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Posted to commits@commons.apache.org by ki...@apache.org on 2020/04/19 06:40:41 UTC

[commons-collections] branch master updated: Simplify several assertions in CollectionUtilsTest.

This is an automated email from the ASF dual-hosted git repository.

kinow pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/commons-collections.git


The following commit(s) were added to refs/heads/master by this push:
     new e22691f  Simplify several assertions in CollectionUtilsTest.
     new 477db84  Merge branch 'pr-158'
e22691f is described below

commit e22691f8108abd2a7a45f6ac3fd61b3e2d0affc3
Author: Isira Seneviratne <is...@gmail.com>
AuthorDate: Sun Apr 19 07:29:15 2020 +0530

    Simplify several assertions in CollectionUtilsTest.
    
    Also remove use of Integer constructor as it has been deprecated since Java 9.
---
 .../commons/collections4/CollectionUtilsTest.java  | 231 ++++++-----
 .../commons/collections4/ComparatorUtilsTest.java  |  14 +-
 .../commons/collections4/FactoryUtilsTest.java     |   9 +-
 .../commons/collections4/IterableUtilsTest.java    |  10 +-
 .../commons/collections4/MultiMapUtilsTest.java    |  30 +-
 .../commons/collections4/PredicateUtilsTest.java   | 279 +++++++-------
 .../apache/commons/collections4/SetUtilsTest.java  |  28 +-
 .../commons/collections4/TransformerUtilsTest.java |  61 +--
 .../commons/collections4/bag/AbstractBagTest.java  | 107 +++---
 .../collections4/bag/CollectionBagTest.java        |   2 +-
 .../collections4/bag/CollectionSortedBagTest.java  |   2 +-
 .../collections4/bag/PredicatedBagTest.java        |  18 +-
 .../collections4/bag/PredicatedSortedBagTest.java  |   2 +-
 .../collections4/bag/TransformedBagTest.java       |  18 +-
 .../collections4/bag/TransformedSortedBagTest.java |   8 +-
 .../collections4/bidimap/AbstractBidiMapTest.java  |  74 ++--
 .../bidimap/AbstractSortedBidiMapTest.java         | 424 ++++++++++-----------
 .../collection/AbstractCollectionTest.java         |  72 ++--
 .../collection/CompositeCollectionTest.java        |  35 +-
 .../collection/PredicatedCollectionTest.java       |  20 +-
 .../collection/TransformedCollectionTest.java      |  21 +-
 .../comparators/AbstractComparatorTest.java        |  15 +-
 .../comparators/BooleanComparatorTest.java         |  17 +-
 .../comparators/ComparatorChainTest.java           |  81 ++--
 .../comparators/FixedOrderComparatorTest.java      |  13 +-
 .../functors/AbstractPredicateTest.java            |   4 +-
 .../functors/ComparatorPredicateTest.java          |  30 +-
 .../collections4/functors/EqualPredicateTest.java  |   6 +-
 .../collections4/functors/NullPredicateTest.java   |   4 +-
 29 files changed, 760 insertions(+), 875 deletions(-)

diff --git a/src/test/java/org/apache/commons/collections4/CollectionUtilsTest.java b/src/test/java/org/apache/commons/collections4/CollectionUtilsTest.java
index 3f69ebc..ed84795 100644
--- a/src/test/java/org/apache/commons/collections4/CollectionUtilsTest.java
+++ b/src/test/java/org/apache/commons/collections4/CollectionUtilsTest.java
@@ -19,6 +19,7 @@ package org.apache.commons.collections4;
 import static org.apache.commons.collections4.functors.EqualPredicate.equalPredicate;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertNotSame;
 import static org.junit.Assert.assertNull;
 import static org.junit.Assert.assertSame;
 import static org.junit.Assert.assertTrue;
@@ -304,19 +305,19 @@ public class CollectionUtilsTest extends MockTestCase {
         multiples.add("3");
         multiples.add("1");
 
-        assertTrue("containsAll({1},{1,3}) should return false.", !CollectionUtils.containsAll(one, odds));
+        assertFalse("containsAll({1},{1,3}) should return false.", CollectionUtils.containsAll(one, odds));
         assertTrue("containsAll({1,3},{1}) should return true.", CollectionUtils.containsAll(odds, one));
-        assertTrue("containsAll({3},{1,3}) should return false.", !CollectionUtils.containsAll(three, odds));
+        assertFalse("containsAll({3},{1,3}) should return false.", CollectionUtils.containsAll(three, odds));
         assertTrue("containsAll({1,3},{3}) should return true.", CollectionUtils.containsAll(odds, three));
         assertTrue("containsAll({2},{2}) should return true.", CollectionUtils.containsAll(two, two));
         assertTrue("containsAll({1,3},{1,3}) should return true.", CollectionUtils.containsAll(odds, odds));
 
-        assertTrue("containsAll({2},{1,3}) should return false.", !CollectionUtils.containsAll(two, odds));
-        assertTrue("containsAll({1,3},{2}) should return false.", !CollectionUtils.containsAll(odds, two));
-        assertTrue("containsAll({1},{3}) should return false.", !CollectionUtils.containsAll(one, three));
-        assertTrue("containsAll({3},{1}) should return false.", !CollectionUtils.containsAll(three, one));
+        assertFalse("containsAll({2},{1,3}) should return false.", CollectionUtils.containsAll(two, odds));
+        assertFalse("containsAll({1,3},{2}) should return false.", CollectionUtils.containsAll(odds, two));
+        assertFalse("containsAll({1},{3}) should return false.", CollectionUtils.containsAll(one, three));
+        assertFalse("containsAll({3},{1}) should return false.", CollectionUtils.containsAll(three, one));
         assertTrue("containsAll({1,3},{}) should return true.", CollectionUtils.containsAll(odds, empty));
-        assertTrue("containsAll({},{1,3}) should return false.", !CollectionUtils.containsAll(empty, odds));
+        assertFalse("containsAll({},{1,3}) should return false.", CollectionUtils.containsAll(empty, odds));
         assertTrue("containsAll({},{}) should return true.", CollectionUtils.containsAll(empty, empty));
 
         assertTrue("containsAll({1,3},{1,3,1}) should return true.", CollectionUtils.containsAll(odds, multiples));
@@ -343,13 +344,13 @@ public class CollectionUtilsTest extends MockTestCase {
         assertTrue("containsAny({2},{2}) should return true.", CollectionUtils.containsAny(two, two));
         assertTrue("containsAny({1,3},{1,3}) should return true.", CollectionUtils.containsAny(odds, odds));
 
-        assertTrue("containsAny({2},{1,3}) should return false.", !CollectionUtils.containsAny(two, odds));
-        assertTrue("containsAny({1,3},{2}) should return false.", !CollectionUtils.containsAny(odds, two));
-        assertTrue("containsAny({1},{3}) should return false.", !CollectionUtils.containsAny(one, three));
-        assertTrue("containsAny({3},{1}) should return false.", !CollectionUtils.containsAny(three, one));
-        assertTrue("containsAny({1,3},{}) should return false.", !CollectionUtils.containsAny(odds, empty));
-        assertTrue("containsAny({},{1,3}) should return false.", !CollectionUtils.containsAny(empty, odds));
-        assertTrue("containsAny({},{}) should return false.", !CollectionUtils.containsAny(empty, empty));
+        assertFalse("containsAny({2},{1,3}) should return false.", CollectionUtils.containsAny(two, odds));
+        assertFalse("containsAny({1,3},{2}) should return false.", CollectionUtils.containsAny(odds, two));
+        assertFalse("containsAny({1},{3}) should return false.", CollectionUtils.containsAny(one, three));
+        assertFalse("containsAny({3},{1}) should return false.", CollectionUtils.containsAny(three, one));
+        assertFalse("containsAny({1,3},{}) should return false.", CollectionUtils.containsAny(odds, empty));
+        assertFalse("containsAny({},{1,3}) should return false.", CollectionUtils.containsAny(empty, odds));
+        assertFalse("containsAny({},{}) should return false.", CollectionUtils.containsAny(empty, empty));
     }
 
     @Test(expected = NullPointerException.class)
@@ -400,13 +401,13 @@ public class CollectionUtilsTest extends MockTestCase {
         assertTrue("containsAny({2},{2}) should return true.", CollectionUtils.containsAny(two, twoArr));
         assertTrue("containsAny({1,3},{1,3}) should return true.", CollectionUtils.containsAny(odds, oddsArr));
 
-        assertTrue("containsAny({2},{1,3}) should return false.", !CollectionUtils.containsAny(two, oddsArr));
-        assertTrue("containsAny({1,3},{2}) should return false.", !CollectionUtils.containsAny(odds, twoArr));
-        assertTrue("containsAny({1},{3}) should return false.", !CollectionUtils.containsAny(one, threeArr));
-        assertTrue("containsAny({3},{1}) should return false.", !CollectionUtils.containsAny(three, oneArr));
-        assertTrue("containsAny({1,3},{}) should return false.", !CollectionUtils.containsAny(odds, emptyArr));
-        assertTrue("containsAny({},{1,3}) should return false.", !CollectionUtils.containsAny(empty, oddsArr));
-        assertTrue("containsAny({},{}) should return false.", !CollectionUtils.containsAny(empty, emptyArr));
+        assertFalse("containsAny({2},{1,3}) should return false.", CollectionUtils.containsAny(two, oddsArr));
+        assertFalse("containsAny({1,3},{2}) should return false.", CollectionUtils.containsAny(odds, twoArr));
+        assertFalse("containsAny({1},{3}) should return false.", CollectionUtils.containsAny(one, threeArr));
+        assertFalse("containsAny({3},{1}) should return false.", CollectionUtils.containsAny(three, oneArr));
+        assertFalse("containsAny({1,3},{}) should return false.", CollectionUtils.containsAny(odds, emptyArr));
+        assertFalse("containsAny({},{1,3}) should return false.", CollectionUtils.containsAny(empty, oddsArr));
+        assertFalse("containsAny({},{}) should return false.", CollectionUtils.containsAny(empty, emptyArr));
     }
 
     @Test(expected = NullPointerException.class)
@@ -601,47 +602,47 @@ public class CollectionUtilsTest extends MockTestCase {
 
     @Test
     public void testIsSubCollection() {
-        assertTrue(!CollectionUtils.isSubCollection(collectionA, collectionC));
-        assertTrue(!CollectionUtils.isSubCollection(collectionC, collectionA));
+        assertFalse(CollectionUtils.isSubCollection(collectionA, collectionC));
+        assertFalse(CollectionUtils.isSubCollection(collectionC, collectionA));
     }
 
     @Test
     public void testIsSubCollection2() {
         final Collection<Integer> c = new ArrayList<>();
         assertTrue(CollectionUtils.isSubCollection(c, collectionA));
-        assertTrue(!CollectionUtils.isSubCollection(collectionA, c));
+        assertFalse(CollectionUtils.isSubCollection(collectionA, c));
         c.add(1);
         assertTrue(CollectionUtils.isSubCollection(c, collectionA));
-        assertTrue(!CollectionUtils.isSubCollection(collectionA, c));
+        assertFalse(CollectionUtils.isSubCollection(collectionA, c));
         c.add(2);
         assertTrue(CollectionUtils.isSubCollection(c, collectionA));
-        assertTrue(!CollectionUtils.isSubCollection(collectionA, c));
+        assertFalse(CollectionUtils.isSubCollection(collectionA, c));
         c.add(2);
         assertTrue(CollectionUtils.isSubCollection(c, collectionA));
-        assertTrue(!CollectionUtils.isSubCollection(collectionA, c));
+        assertFalse(CollectionUtils.isSubCollection(collectionA, c));
         c.add(3);
         assertTrue(CollectionUtils.isSubCollection(c, collectionA));
-        assertTrue(!CollectionUtils.isSubCollection(collectionA, c));
+        assertFalse(CollectionUtils.isSubCollection(collectionA, c));
         c.add(3);
         assertTrue(CollectionUtils.isSubCollection(c, collectionA));
-        assertTrue(!CollectionUtils.isSubCollection(collectionA, c));
+        assertFalse(CollectionUtils.isSubCollection(collectionA, c));
         c.add(3);
         assertTrue(CollectionUtils.isSubCollection(c, collectionA));
-        assertTrue(!CollectionUtils.isSubCollection(collectionA, c));
+        assertFalse(CollectionUtils.isSubCollection(collectionA, c));
         c.add(4);
         assertTrue(CollectionUtils.isSubCollection(c, collectionA));
-        assertTrue(!CollectionUtils.isSubCollection(collectionA, c));
+        assertFalse(CollectionUtils.isSubCollection(collectionA, c));
         c.add(4);
         assertTrue(CollectionUtils.isSubCollection(c, collectionA));
-        assertTrue(!CollectionUtils.isSubCollection(collectionA, c));
+        assertFalse(CollectionUtils.isSubCollection(collectionA, c));
         c.add(4);
         assertTrue(CollectionUtils.isSubCollection(c, collectionA));
-        assertTrue(!CollectionUtils.isSubCollection(collectionA, c));
+        assertFalse(CollectionUtils.isSubCollection(collectionA, c));
         c.add(4);
         assertTrue(CollectionUtils.isSubCollection(c, collectionA));
         assertTrue(CollectionUtils.isSubCollection(collectionA, c));
         c.add(5);
-        assertTrue(!CollectionUtils.isSubCollection(c, collectionA));
+        assertFalse(CollectionUtils.isSubCollection(c, collectionA));
         assertTrue(CollectionUtils.isSubCollection(collectionA, c));
     }
 
@@ -667,8 +668,8 @@ public class CollectionUtilsTest extends MockTestCase {
 
     @Test
     public void testIsEqualCollection() {
-        assertTrue(!CollectionUtils.isEqualCollection(collectionA, collectionC));
-        assertTrue(!CollectionUtils.isEqualCollection(collectionC, collectionA));
+        assertFalse(CollectionUtils.isEqualCollection(collectionA, collectionC));
+        assertFalse(CollectionUtils.isEqualCollection(collectionC, collectionA));
     }
 
     @Test
@@ -688,20 +689,20 @@ public class CollectionUtilsTest extends MockTestCase {
         assertTrue(CollectionUtils.isEqualCollection(a, b));
         assertTrue(CollectionUtils.isEqualCollection(b, a));
         a.add("1");
-        assertTrue(!CollectionUtils.isEqualCollection(a, b));
-        assertTrue(!CollectionUtils.isEqualCollection(b, a));
+        assertFalse(CollectionUtils.isEqualCollection(a, b));
+        assertFalse(CollectionUtils.isEqualCollection(b, a));
         b.add("1");
         assertTrue(CollectionUtils.isEqualCollection(a, b));
         assertTrue(CollectionUtils.isEqualCollection(b, a));
         a.add("2");
-        assertTrue(!CollectionUtils.isEqualCollection(a, b));
-        assertTrue(!CollectionUtils.isEqualCollection(b, a));
+        assertFalse(CollectionUtils.isEqualCollection(a, b));
+        assertFalse(CollectionUtils.isEqualCollection(b, a));
         b.add("2");
         assertTrue(CollectionUtils.isEqualCollection(a, b));
         assertTrue(CollectionUtils.isEqualCollection(b, a));
         a.add("1");
-        assertTrue(!CollectionUtils.isEqualCollection(a, b));
-        assertTrue(!CollectionUtils.isEqualCollection(b, a));
+        assertFalse(CollectionUtils.isEqualCollection(a, b));
+        assertFalse(CollectionUtils.isEqualCollection(b, a));
         b.add("1");
         assertTrue(CollectionUtils.isEqualCollection(a, b));
         assertTrue(CollectionUtils.isEqualCollection(b, a));
@@ -791,22 +792,22 @@ public class CollectionUtilsTest extends MockTestCase {
     public void testIsProperSubCollection() {
         final Collection<String> a = new ArrayList<>();
         final Collection<String> b = new ArrayList<>();
-        assertTrue(!CollectionUtils.isProperSubCollection(a, b));
+        assertFalse(CollectionUtils.isProperSubCollection(a, b));
         b.add("1");
         assertTrue(CollectionUtils.isProperSubCollection(a, b));
-        assertTrue(!CollectionUtils.isProperSubCollection(b, a));
-        assertTrue(!CollectionUtils.isProperSubCollection(b, b));
-        assertTrue(!CollectionUtils.isProperSubCollection(a, a));
+        assertFalse(CollectionUtils.isProperSubCollection(b, a));
+        assertFalse(CollectionUtils.isProperSubCollection(b, b));
+        assertFalse(CollectionUtils.isProperSubCollection(a, a));
         a.add("1");
         a.add("2");
         b.add("2");
-        assertTrue(!CollectionUtils.isProperSubCollection(b, a));
-        assertTrue(!CollectionUtils.isProperSubCollection(a, b));
+        assertFalse(CollectionUtils.isProperSubCollection(b, a));
+        assertFalse(CollectionUtils.isProperSubCollection(a, b));
         a.add("1");
         assertTrue(CollectionUtils.isProperSubCollection(b, a));
         assertTrue(CollectionUtils.isProperSubCollection(CollectionUtils.intersection(collectionA, collectionC), collectionA));
         assertTrue(CollectionUtils.isProperSubCollection(CollectionUtils.subtract(a, b), a));
-        assertTrue(!CollectionUtils.isProperSubCollection(a, CollectionUtils.subtract(a, b)));
+        assertFalse(CollectionUtils.isProperSubCollection(a, CollectionUtils.subtract(a, b)));
     }
 
     @Test(expected = NullPointerException.class)
@@ -828,10 +829,10 @@ public class CollectionUtilsTest extends MockTestCase {
     public void find() {
         Predicate<Number> testPredicate = equalPredicate((Number) 4);
         Integer test = CollectionUtils.find(collectionA, testPredicate);
-        assertTrue(test.equals(4));
+        assertEquals(4, (int) test);
         testPredicate = equalPredicate((Number) 45);
         test = CollectionUtils.find(collectionA, testPredicate);
-        assertTrue(test == null);
+        assertNull(test);
         assertNull(CollectionUtils.find(null, testPredicate));
         assertNull(CollectionUtils.find(collectionA, null));
     }
@@ -900,7 +901,7 @@ public class CollectionUtilsTest extends MockTestCase {
         col.add(collectionB);
         lastElement = CollectionUtils.forAllButLastDo(col, testClosure);
         assertSame(lastElement, collectionB);
-        assertTrue(!collectionB.isEmpty() );
+        assertFalse(collectionB.isEmpty());
 
         col.clear();
         lastElement = CollectionUtils.forAllButLastDo(col, testClosure);
@@ -1008,7 +1009,7 @@ public class CollectionUtilsTest extends MockTestCase {
         } catch (final IndexOutOfBoundsException e) {
             // expected
         }
-        assertTrue(!iterator.hasNext());
+        assertFalse(iterator.hasNext());
     }
 
     @Test
@@ -1030,7 +1031,7 @@ public class CollectionUtilsTest extends MockTestCase {
         } catch (final IndexOutOfBoundsException e) {
             // expected
         }
-        assertTrue(!en.hasMoreElements());
+        assertFalse(en.hasMoreElements());
     }
 
     @Test(expected = IndexOutOfBoundsException.class)
@@ -1157,15 +1158,15 @@ public class CollectionUtilsTest extends MockTestCase {
     // -----------------------------------------------------------------------
     @Test
     public void testSizeIsEmpty_Null() {
-        assertEquals(true, CollectionUtils.sizeIsEmpty(null));
+        assertTrue(CollectionUtils.sizeIsEmpty(null));
     }
 
     @Test
     public void testSizeIsEmpty_List() {
         final List<String> list = new ArrayList<>();
-        assertEquals(true, CollectionUtils.sizeIsEmpty(list));
+        assertTrue(CollectionUtils.sizeIsEmpty(list));
         list.add("a");
-        assertEquals(false, CollectionUtils.sizeIsEmpty(list));
+        assertFalse(CollectionUtils.sizeIsEmpty(list));
     }
 
     @Test
@@ -1179,49 +1180,49 @@ public class CollectionUtilsTest extends MockTestCase {
     @Test
     public void testSizeIsEmpty_Array() {
         final Object[] objectArray = new Object[0];
-        assertEquals(true, CollectionUtils.sizeIsEmpty(objectArray));
+        assertTrue(CollectionUtils.sizeIsEmpty(objectArray));
 
         final String[] stringArray = new String[3];
-        assertEquals(false, CollectionUtils.sizeIsEmpty(stringArray));
+        assertFalse(CollectionUtils.sizeIsEmpty(stringArray));
         stringArray[0] = "a";
         stringArray[1] = "b";
         stringArray[2] = "c";
-        assertEquals(false, CollectionUtils.sizeIsEmpty(stringArray));
+        assertFalse(CollectionUtils.sizeIsEmpty(stringArray));
     }
 
     @Test
     public void testSizeIsEmpty_PrimitiveArray() {
         final int[] intArray = new int[0];
-        assertEquals(true, CollectionUtils.sizeIsEmpty(intArray));
+        assertTrue(CollectionUtils.sizeIsEmpty(intArray));
 
         final double[] doubleArray = new double[3];
-        assertEquals(false, CollectionUtils.sizeIsEmpty(doubleArray));
+        assertFalse(CollectionUtils.sizeIsEmpty(doubleArray));
         doubleArray[0] = 0.0d;
         doubleArray[1] = 1.0d;
         doubleArray[2] = 2.5d;
-        assertEquals(false, CollectionUtils.sizeIsEmpty(doubleArray));
+        assertFalse(CollectionUtils.sizeIsEmpty(doubleArray));
     }
 
     @Test
     public void testSizeIsEmpty_Enumeration() {
         final Vector<String> list = new Vector<>();
-        assertEquals(true, CollectionUtils.sizeIsEmpty(list.elements()));
+        assertTrue(CollectionUtils.sizeIsEmpty(list.elements()));
         list.add("a");
-        assertEquals(false, CollectionUtils.sizeIsEmpty(list.elements()));
+        assertFalse(CollectionUtils.sizeIsEmpty(list.elements()));
         final Enumeration<String> en = list.elements();
         en.nextElement();
-        assertEquals(true, CollectionUtils.sizeIsEmpty(en));
+        assertTrue(CollectionUtils.sizeIsEmpty(en));
     }
 
     @Test
     public void testSizeIsEmpty_Iterator() {
         final List<String> list = new ArrayList<>();
-        assertEquals(true, CollectionUtils.sizeIsEmpty(list.iterator()));
+        assertTrue(CollectionUtils.sizeIsEmpty(list.iterator()));
         list.add("a");
-        assertEquals(false, CollectionUtils.sizeIsEmpty(list.iterator()));
+        assertFalse(CollectionUtils.sizeIsEmpty(list.iterator()));
         final Iterator<String> it = list.iterator();
         it.next();
-        assertEquals(true, CollectionUtils.sizeIsEmpty(it));
+        assertTrue(CollectionUtils.sizeIsEmpty(it));
     }
 
     @Test
@@ -1236,40 +1237,32 @@ public class CollectionUtilsTest extends MockTestCase {
     // -----------------------------------------------------------------------
     @Test
     public void testIsEmptyWithEmptyCollection() {
-        final Collection<Object> coll = new ArrayList<>();
-        assertEquals(true, CollectionUtils.isEmpty(coll));
+        assertTrue(CollectionUtils.isEmpty(new ArrayList<>()));
     }
 
     @Test
     public void testIsEmptyWithNonEmptyCollection() {
-        final Collection<String> coll = new ArrayList<>();
-        coll.add("item");
-        assertEquals(false, CollectionUtils.isEmpty(coll));
+        assertFalse(CollectionUtils.isEmpty(Collections.singletonList("item")));
     }
 
     @Test
     public void testIsEmptyWithNull() {
-        final Collection<?> coll = null;
-        assertEquals(true, CollectionUtils.isEmpty(coll));
+        assertTrue(CollectionUtils.isEmpty(null));
     }
 
     @Test
     public void testIsNotEmptyWithEmptyCollection() {
-        final Collection<Object> coll = new ArrayList<>();
-        assertEquals(false, CollectionUtils.isNotEmpty(coll));
+        assertFalse(CollectionUtils.isNotEmpty(new ArrayList<>()));
     }
 
     @Test
     public void testIsNotEmptyWithNonEmptyCollection() {
-        final Collection<String> coll = new ArrayList<>();
-        coll.add("item");
-        assertEquals(true, CollectionUtils.isNotEmpty(coll));
+        assertTrue(CollectionUtils.isNotEmpty(Collections.singletonList("item")));
     }
 
     @Test
     public void testIsNotEmptyWithNull() {
-        final Collection<?> coll = null;
-        assertEquals(false, CollectionUtils.isNotEmpty(coll));
+        assertFalse(CollectionUtils.isNotEmpty(null));
     }
 
     // -----------------------------------------------------------------------
@@ -1349,7 +1342,7 @@ public class CollectionUtilsTest extends MockTestCase {
         assertFalse(CollectionUtils.exists(list, EQUALS_TWO));
 
         list.add(2);
-        assertEquals(true, CollectionUtils.exists(list, EQUALS_TWO));
+        assertTrue(CollectionUtils.exists(list, EQUALS_TWO));
     }
 
     @Test
@@ -1504,9 +1497,9 @@ public class CollectionUtilsTest extends MockTestCase {
         assertEquals(3, set.size());
         assertFalse(CollectionUtils.addIgnoreNull(set, "1"));
         assertEquals(3, set.size());
-        assertEquals(true, CollectionUtils.addIgnoreNull(set, "4"));
+        assertTrue(CollectionUtils.addIgnoreNull(set, "4"));
         assertEquals(4, set.size());
-        assertEquals(true, set.contains("4"));
+        assertTrue(set.contains("4"));
     }
 
     @Test(expected = NullPointerException.class)
@@ -1543,11 +1536,11 @@ public class CollectionUtilsTest extends MockTestCase {
         assertFalse(CollectionUtils.isFull(set));
 
         final CircularFifoQueue<String> buf = new CircularFifoQueue<>(set);
-        assertEquals(false, CollectionUtils.isFull(buf));
+        assertFalse(CollectionUtils.isFull(buf));
         buf.remove("2");
         assertFalse(CollectionUtils.isFull(buf));
         buf.add("2");
-        assertEquals(false, CollectionUtils.isFull(buf));
+        assertFalse(CollectionUtils.isFull(buf));
     }
 
     @Test(expected = NullPointerException.class)
@@ -1585,15 +1578,11 @@ public class CollectionUtilsTest extends MockTestCase {
     @Test
     public void intersectionUsesMethodEquals() {
         // Let elta and eltb be objects...
-        final Integer elta = new Integer(17); // Cannot use valueOf here
-        final Integer eltb = new Integer(17);
-
-        // ...which are equal...
-        assertEquals(elta, eltb);
-        assertEquals(eltb, elta);
+        final Integer elta = 17;
+        final Integer eltb = 17;
 
-        // ...but not the same (==).
-        assertTrue(elta != eltb);
+        // ...which are the same (==)
+        assertSame(elta, eltb);
 
         // Let cola and colb be collections...
         final Collection<Number> cola = new ArrayList<>();
@@ -1613,7 +1602,7 @@ public class CollectionUtilsTest extends MockTestCase {
         // or eltb, although this isn't strictly part of the
         // contract.
         final Object eltc = intersection.iterator().next();
-        assertTrue(eltc == elta && eltc != eltb || eltc != elta && eltc == eltb);
+        assertTrue(eltc == elta && eltc == eltb);
 
         // In any event, this element remains equal,
         // to both elta and eltb.
@@ -1638,17 +1627,17 @@ public class CollectionUtilsTest extends MockTestCase {
 
         final Collection<String> result = CollectionUtils.retainAll(base, sub);
         assertEquals(2, result.size());
-        assertEquals(true, result.contains("A"));
+        assertTrue(result.contains("A"));
         assertFalse(result.contains("B"));
-        assertEquals(true, result.contains("C"));
+        assertTrue(result.contains("C"));
         assertEquals(3, base.size());
-        assertEquals(true, base.contains("A"));
-        assertEquals(true, base.contains("B"));
-        assertEquals(true, base.contains("C"));
+        assertTrue(base.contains("A"));
+        assertTrue(base.contains("B"));
+        assertTrue(base.contains("C"));
         assertEquals(3, sub.size());
-        assertEquals(true, sub.contains("A"));
-        assertEquals(true, sub.contains("C"));
-        assertEquals(true, sub.contains("X"));
+        assertTrue(sub.contains("A"));
+        assertTrue(sub.contains("C"));
+        assertTrue(sub.contains("X"));
     }
 
     @Test(expected = NullPointerException.class)
@@ -1788,16 +1777,16 @@ public class CollectionUtilsTest extends MockTestCase {
         final Collection<String> result = CollectionUtils.removeAll(base, sub);
         assertEquals(1, result.size());
         assertFalse(result.contains("A"));
-        assertEquals(true, result.contains("B"));
+        assertTrue(result.contains("B"));
         assertFalse(result.contains("C"));
         assertEquals(3, base.size());
-        assertEquals(true, base.contains("A"));
-        assertEquals(true, base.contains("B"));
-        assertEquals(true, base.contains("C"));
+        assertTrue(base.contains("A"));
+        assertTrue(base.contains("B"));
+        assertTrue(base.contains("C"));
         assertEquals(3, sub.size());
-        assertEquals(true, sub.contains("A"));
-        assertEquals(true, sub.contains("C"));
-        assertEquals(true, sub.contains("X"));
+        assertTrue(sub.contains("A"));
+        assertTrue(sub.contains("C"));
+        assertTrue(sub.contains("X"));
     }
 
     @Test(expected = NullPointerException.class)
@@ -1841,9 +1830,9 @@ public class CollectionUtilsTest extends MockTestCase {
         list.add("2");
         list.add("3");
         final Collection<Object> result = CollectionUtils.transformingCollection(list, TRANSFORM_TO_INTEGER);
-        assertEquals(true, result.contains("1")); // untransformed
-        assertEquals(true, result.contains("2")); // untransformed
-        assertEquals(true, result.contains("3")); // untransformed
+        assertTrue(result.contains("1")); // untransformed
+        assertTrue(result.contains("2")); // untransformed
+        assertTrue(result.contains("3")); // untransformed
     }
 
     @Test
@@ -2196,13 +2185,13 @@ public class CollectionUtilsTest extends MockTestCase {
         assertTrue(result.contains("BB"));
         assertFalse(result.contains("CA"));
         assertEquals(3, base.size());
-        assertEquals(true, base.contains("AC"));
-        assertEquals(true, base.contains("BB"));
-        assertEquals(true, base.contains("CA"));
+        assertTrue(base.contains("AC"));
+        assertTrue(base.contains("BB"));
+        assertTrue(base.contains("CA"));
         assertEquals(3, remove.size());
-        assertEquals(true, remove.contains("AA"));
-        assertEquals(true, remove.contains("CX"));
-        assertEquals(true, remove.contains("XZ"));
+        assertTrue(remove.contains("AA"));
+        assertTrue(remove.contains("CX"));
+        assertTrue(remove.contains("XZ"));
 
         try {
             CollectionUtils.removeAll(null, null, DefaultEquator.defaultEquator());
diff --git a/src/test/java/org/apache/commons/collections4/ComparatorUtilsTest.java b/src/test/java/org/apache/commons/collections4/ComparatorUtilsTest.java
index 040974a..ae9af09 100644
--- a/src/test/java/org/apache/commons/collections4/ComparatorUtilsTest.java
+++ b/src/test/java/org/apache/commons/collections4/ComparatorUtilsTest.java
@@ -29,17 +29,16 @@ import org.junit.Test;
  *
  */
 public class ComparatorUtilsTest {
-
     @Test
     public void booleanComparator() {
         Comparator<Boolean> comp = ComparatorUtils.booleanComparator(true);
         assertTrue(comp.compare(Boolean.TRUE, Boolean.FALSE) < 0);
-        assertTrue(comp.compare(Boolean.TRUE, Boolean.TRUE) == 0);
+        assertEquals(0, comp.compare(Boolean.TRUE, Boolean.TRUE));
         assertTrue(comp.compare(Boolean.FALSE, Boolean.TRUE) > 0);
 
         comp = ComparatorUtils.booleanComparator(false);
         assertTrue(comp.compare(Boolean.TRUE, Boolean.FALSE) > 0);
-        assertTrue(comp.compare(Boolean.TRUE, Boolean.TRUE) == 0);
+        assertEquals(0, comp.compare(Boolean.TRUE, Boolean.TRUE));
         assertTrue(comp.compare(Boolean.FALSE, Boolean.TRUE) < 0);
     }
 
@@ -47,9 +46,9 @@ public class ComparatorUtilsTest {
     public void chainedComparator() {
         // simple test: chain 2 natural comparators
         final Comparator<Integer> comp = ComparatorUtils.chainedComparator(ComparatorUtils.<Integer>naturalComparator(),
-                                                                     ComparatorUtils.<Integer>naturalComparator());
+                ComparatorUtils.naturalComparator());
         assertTrue(comp.compare(1, 2) < 0);
-        assertTrue(comp.compare(1, 1) == 0);
+        assertEquals(0, comp.compare(1, 1));
         assertTrue(comp.compare(2, 1) > 0);
     }
 
@@ -109,7 +108,7 @@ public class ComparatorUtilsTest {
     public void nullLowComparator() {
         final Comparator<Integer> comp = ComparatorUtils.nullLowComparator(null);
         assertTrue(comp.compare(null, 10) < 0);
-        assertTrue(comp.compare(null, null) == 0);
+        assertEquals(0, comp.compare(null, null));
         assertTrue(comp.compare(10, null) > 0);
     }
 
@@ -117,8 +116,7 @@ public class ComparatorUtilsTest {
     public void nullHighComparator() {
         final Comparator<Integer> comp = ComparatorUtils.nullHighComparator(null);
         assertTrue(comp.compare(null, 10) > 0);
-        assertTrue(comp.compare(null, null) == 0);
+        assertEquals(0, comp.compare(null, null));
         assertTrue(comp.compare(10, null) < 0);
     }
-
 }
diff --git a/src/test/java/org/apache/commons/collections4/FactoryUtilsTest.java b/src/test/java/org/apache/commons/collections4/FactoryUtilsTest.java
index 437dcd6..b003a94 100644
--- a/src/test/java/org/apache/commons/collections4/FactoryUtilsTest.java
+++ b/src/test/java/org/apache/commons/collections4/FactoryUtilsTest.java
@@ -18,6 +18,7 @@ package org.apache.commons.collections4;
 
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertNotSame;
 import static org.junit.Assert.assertNull;
 import static org.junit.Assert.assertSame;
 import static org.junit.Assert.assertTrue;
@@ -103,7 +104,7 @@ public class FactoryUtilsTest {
         final Factory<Date> factory = FactoryUtils.prototypeFactory(proto);
         assertNotNull(factory);
         final Date created = factory.create();
-        assertTrue(proto != created);
+        assertNotSame(proto, created);
         assertEquals(proto, created);
     }
 
@@ -113,17 +114,17 @@ public class FactoryUtilsTest {
         final Factory<Object> factory = FactoryUtils.<Object>prototypeFactory(proto);
         assertNotNull(factory);
         final Object created = factory.create();
-        assertTrue(proto != created);
+        assertNotSame(proto, created);
         assertEquals(proto, created);
     }
 
     @Test
     public void testPrototypeFactoryPublicSerialization() throws Exception {
-        final Integer proto = Integer.valueOf(9);
+        final Integer proto = 9;
         final Factory<Integer> factory = FactoryUtils.prototypeFactory(proto);
         assertNotNull(factory);
         final Integer created = factory.create();
-        assertTrue(proto != created);
+        assertNotSame(proto, created);
         assertEquals(proto, created);
     }
 
diff --git a/src/test/java/org/apache/commons/collections4/IterableUtilsTest.java b/src/test/java/org/apache/commons/collections4/IterableUtilsTest.java
index b826f72..b26d9c1 100644
--- a/src/test/java/org/apache/commons/collections4/IterableUtilsTest.java
+++ b/src/test/java/org/apache/commons/collections4/IterableUtilsTest.java
@@ -266,12 +266,12 @@ public class IterableUtilsTest {
 
     @Test
     public void find() {
-        Predicate<Number> testPredicate = equalPredicate((Number) 4);
+        Predicate<Number> testPredicate = equalPredicate(4);
         Integer test = IterableUtils.find(iterableA, testPredicate);
-        assertTrue(test.equals(4));
-        testPredicate = equalPredicate((Number) 45);
+        assertEquals(4, (int) test);
+        testPredicate = equalPredicate(45);
         test = IterableUtils.find(iterableA, testPredicate);
-        assertTrue(test == null);
+        assertNull(test);
         assertNull(IterableUtils.find(null, testPredicate));
         try {
             IterableUtils.find(iterableA, null);
@@ -344,7 +344,7 @@ public class IterableUtilsTest {
         assertFalse(IterableUtils.matchesAny(list, EQUALS_TWO));
 
         list.add(2);
-        assertEquals(true, IterableUtils.matchesAny(list, EQUALS_TWO));
+        assertTrue(IterableUtils.matchesAny(list, EQUALS_TWO));
     }
 
     @Test
diff --git a/src/test/java/org/apache/commons/collections4/MultiMapUtilsTest.java b/src/test/java/org/apache/commons/collections4/MultiMapUtilsTest.java
index 4806ba0..fca9123 100644
--- a/src/test/java/org/apache/commons/collections4/MultiMapUtilsTest.java
+++ b/src/test/java/org/apache/commons/collections4/MultiMapUtilsTest.java
@@ -22,7 +22,9 @@ import static org.junit.Assert.assertNull;
 import static org.junit.Assert.assertTrue;
 import static org.junit.Assert.fail;
 
+import java.util.Arrays;
 import java.util.Collection;
+import java.util.HashSet;
 import java.util.List;
 import java.util.Set;
 
@@ -70,61 +72,54 @@ public class MultiMapUtilsTest {
 
     @Test
     public void testIsEmptyWithEmptyMap() {
-        final MultiValuedMap<Object, Object> map = new ArrayListValuedHashMap<>();
-        assertEquals(true, MultiMapUtils.isEmpty(map));
+        assertTrue(MultiMapUtils.isEmpty(new ArrayListValuedHashMap<>()));
     }
 
     @Test
     public void testIsEmptyWithNonEmptyMap() {
         final MultiValuedMap<String, String> map = new ArrayListValuedHashMap<>();
         map.put("item", "value");
-        assertEquals(false, MultiMapUtils.isEmpty(map));
+        assertFalse(MultiMapUtils.isEmpty(map));
     }
 
     @Test
     public void testIsEmptyWithNull() {
-        final MultiValuedMap<Object, Object> map = null;
-        assertEquals(true, MultiMapUtils.isEmpty(map));
+        assertTrue(MultiMapUtils.isEmpty(null));
     }
 
     @Test
     public void testGetCollection() {
         assertNull(MultiMapUtils.getCollection(null, "key1"));
 
-        final String values[] = { "v1", "v2", "v3" };
+        final String[] values = { "v1", "v2", "v3" };
         final MultiValuedMap<String, String> map = new ArrayListValuedHashMap<>();
         for (final String val : values) {
             map.put("key1", val);
         }
 
         final Collection<String> col = MultiMapUtils.getCollection(map, "key1");
-        for (final String val : values) {
-            assertTrue(col.contains(val));
-        }
+        assertEquals(Arrays.asList(values), col);
     }
 
     @Test
     public void testGetValuesAsList() {
         assertNull(MultiMapUtils.getValuesAsList(null, "key1"));
 
-        final String values[] = { "v1", "v2", "v3" };
+        final String[] values = { "v1", "v2", "v3" };
         final MultiValuedMap<String, String> map = new ArrayListValuedHashMap<>();
         for (final String val : values) {
             map.put("key1", val);
         }
 
         final List<String> list = MultiMapUtils.getValuesAsList(map, "key1");
-        int i = 0;
-        for (final String val : list) {
-            assertTrue(val.equals(values[i++]));
-        }
+        assertEquals(Arrays.asList(values), list);
     }
 
     @Test
     public void testGetValuesAsSet() {
         assertNull(MultiMapUtils.getValuesAsList(null, "key1"));
 
-        final String values[] = { "v1", "v2", "v3" };
+        final String[] values = { "v1", "v2", "v3" };
         final MultiValuedMap<String, String> map = new ArrayListValuedHashMap<>();
         for (final String val : values) {
             map.put("key1", val);
@@ -132,10 +127,7 @@ public class MultiMapUtilsTest {
         }
 
         final Set<String> set = MultiMapUtils.getValuesAsSet(map, "key1");
-        assertEquals(3, set.size());
-        for (final String val : values) {
-            assertTrue(set.contains(val));
-        }
+        assertEquals(new HashSet<>(Arrays.asList(values)), set);
     }
 
     @Test
diff --git a/src/test/java/org/apache/commons/collections4/PredicateUtilsTest.java b/src/test/java/org/apache/commons/collections4/PredicateUtilsTest.java
index 3613a8c..5cb4971 100644
--- a/src/test/java/org/apache/commons/collections4/PredicateUtilsTest.java
+++ b/src/test/java/org/apache/commons/collections4/PredicateUtilsTest.java
@@ -21,6 +21,7 @@ import static org.apache.commons.collections4.functors.TruePredicate.*;
 import static org.junit.Assert.*;
 
 import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.Collection;
 import java.util.Collections;
 import java.util.HashMap;
@@ -71,10 +72,10 @@ public class PredicateUtilsTest extends AbstractPredicateTest {
     public void testIsNotNullPredicate() {
         assertNotNull(PredicateUtils.notNullPredicate());
         assertSame(PredicateUtils.notNullPredicate(), PredicateUtils.notNullPredicate());
-        assertEquals(false, PredicateUtils.notNullPredicate().evaluate(null));
-        assertEquals(true, PredicateUtils.notNullPredicate().evaluate(cObject));
-        assertEquals(true, PredicateUtils.notNullPredicate().evaluate(cString));
-        assertEquals(true, PredicateUtils.notNullPredicate().evaluate(cInteger));
+        assertFalse(PredicateUtils.notNullPredicate().evaluate(null));
+        assertTrue(PredicateUtils.notNullPredicate().evaluate(cObject));
+        assertTrue(PredicateUtils.notNullPredicate().evaluate(cString));
+        assertTrue(PredicateUtils.notNullPredicate().evaluate(cInteger));
     }
 
     // identityPredicate
@@ -83,12 +84,12 @@ public class PredicateUtilsTest extends AbstractPredicateTest {
     @Test
     public void testIdentityPredicate() {
         assertSame(nullPredicate(), PredicateUtils.identityPredicate(null));
-        assertNotNull(PredicateUtils.identityPredicate(Integer.valueOf(6)));
-        assertEquals(false, PredicateUtils.identityPredicate(Integer.valueOf(6)).evaluate(null));
-        assertEquals(false, PredicateUtils.<Object>identityPredicate(Integer.valueOf(6)).evaluate(cObject));
-        assertEquals(false, PredicateUtils.<Object>identityPredicate(Integer.valueOf(6)).evaluate(cString));
-        assertEquals(false, PredicateUtils.identityPredicate(new Integer(6)).evaluate(cInteger)); // Cannot use valueOf here
-        assertEquals(true, PredicateUtils.identityPredicate(cInteger).evaluate(cInteger));
+        assertNotNull(PredicateUtils.identityPredicate(6));
+        assertFalse(PredicateUtils.identityPredicate(6).evaluate(null));
+        assertFalse(PredicateUtils.<Object>identityPredicate(6).evaluate(cObject));
+        assertFalse(PredicateUtils.<Object>identityPredicate(6).evaluate(cString));
+        assertTrue(PredicateUtils.identityPredicate(6).evaluate(cInteger)); // Cannot use valueOf here
+        assertTrue(PredicateUtils.identityPredicate(cInteger).evaluate(cInteger));
     }
 
     // truePredicate
@@ -98,10 +99,10 @@ public class PredicateUtilsTest extends AbstractPredicateTest {
     public void testTruePredicate() {
         assertNotNull(TruePredicate.truePredicate());
         assertSame(TruePredicate.truePredicate(), TruePredicate.truePredicate());
-        assertEquals(true, TruePredicate.truePredicate().evaluate(null));
-        assertEquals(true, TruePredicate.truePredicate().evaluate(cObject));
-        assertEquals(true, TruePredicate.truePredicate().evaluate(cString));
-        assertEquals(true, TruePredicate.truePredicate().evaluate(cInteger));
+        assertTrue(truePredicate().evaluate(null));
+        assertTrue(truePredicate().evaluate(cObject));
+        assertTrue(truePredicate().evaluate(cString));
+        assertTrue(truePredicate().evaluate(cInteger));
     }
 
     // falsePredicate
@@ -111,10 +112,10 @@ public class PredicateUtilsTest extends AbstractPredicateTest {
     public void testFalsePredicate() {
         assertNotNull(FalsePredicate.falsePredicate());
         assertSame(FalsePredicate.falsePredicate(), FalsePredicate.falsePredicate());
-        assertEquals(false, FalsePredicate.falsePredicate().evaluate(null));
-        assertEquals(false, FalsePredicate.falsePredicate().evaluate(cObject));
-        assertEquals(false, FalsePredicate.falsePredicate().evaluate(cString));
-        assertEquals(false, FalsePredicate.falsePredicate().evaluate(cInteger));
+        assertFalse(FalsePredicate.falsePredicate().evaluate(null));
+        assertFalse(FalsePredicate.falsePredicate().evaluate(cObject));
+        assertFalse(FalsePredicate.falsePredicate().evaluate(cString));
+        assertFalse(FalsePredicate.falsePredicate().evaluate(cInteger));
     }
 
     // notPredicate
@@ -123,10 +124,10 @@ public class PredicateUtilsTest extends AbstractPredicateTest {
     @Test
     public void testNotPredicate() {
         assertNotNull(PredicateUtils.notPredicate(TruePredicate.truePredicate()));
-        assertEquals(false, PredicateUtils.notPredicate(TruePredicate.truePredicate()).evaluate(null));
-        assertEquals(false, PredicateUtils.notPredicate(TruePredicate.truePredicate()).evaluate(cObject));
-        assertEquals(false, PredicateUtils.notPredicate(TruePredicate.truePredicate()).evaluate(cString));
-        assertEquals(false, PredicateUtils.notPredicate(TruePredicate.truePredicate()).evaluate(cInteger));
+        assertFalse(PredicateUtils.notPredicate(truePredicate()).evaluate(null));
+        assertFalse(PredicateUtils.notPredicate(truePredicate()).evaluate(cObject));
+        assertFalse(PredicateUtils.notPredicate(truePredicate()).evaluate(cString));
+        assertFalse(PredicateUtils.notPredicate(truePredicate()).evaluate(cInteger));
     }
 
     @Test(expected=NullPointerException.class)
@@ -139,10 +140,10 @@ public class PredicateUtilsTest extends AbstractPredicateTest {
 
     @Test
     public void testAndPredicate() {
-        assertEquals(true, PredicateUtils.andPredicate(TruePredicate.truePredicate(), TruePredicate.truePredicate()).evaluate(null));
-        assertEquals(false, PredicateUtils.andPredicate(TruePredicate.truePredicate(), FalsePredicate.falsePredicate()).evaluate(null));
-        assertEquals(false, PredicateUtils.andPredicate(FalsePredicate.falsePredicate(), TruePredicate.truePredicate()).evaluate(null));
-        assertEquals(false, PredicateUtils.andPredicate(FalsePredicate.falsePredicate(), FalsePredicate.falsePredicate()).evaluate(null));
+        assertTrue(PredicateUtils.andPredicate(truePredicate(), truePredicate()).evaluate(null));
+        assertFalse(PredicateUtils.andPredicate(truePredicate(), FalsePredicate.falsePredicate()).evaluate(null));
+        assertFalse(PredicateUtils.andPredicate(FalsePredicate.falsePredicate(), truePredicate()).evaluate(null));
+        assertFalse(PredicateUtils.andPredicate(FalsePredicate.falsePredicate(), FalsePredicate.falsePredicate()).evaluate(null));
     }
 
     @Test(expected=NullPointerException.class)
@@ -156,43 +157,39 @@ public class PredicateUtilsTest extends AbstractPredicateTest {
     @SuppressWarnings("unchecked")
     @Test
     public void testAllPredicate() {
-        assertTrue(AllPredicate.allPredicate(new Predicate[] {}), null);
-        assertEquals(true, AllPredicate.allPredicate(new Predicate[] {
-                TruePredicate.truePredicate(), TruePredicate.truePredicate(), TruePredicate.truePredicate()}).evaluate(null));
-        assertEquals(false, AllPredicate.allPredicate(new Predicate[] {
-                TruePredicate.truePredicate(), FalsePredicate.falsePredicate(), TruePredicate.truePredicate()}).evaluate(null));
-        assertEquals(false, AllPredicate.allPredicate(new Predicate[] {
-                FalsePredicate.falsePredicate(), FalsePredicate.falsePredicate(), TruePredicate.truePredicate()}).evaluate(null));
-        assertEquals(false, AllPredicate.allPredicate(new Predicate[] {
-                FalsePredicate.falsePredicate(), FalsePredicate.falsePredicate(), FalsePredicate.falsePredicate()}).evaluate(null));
+        assertPredicateTrue(AllPredicate.allPredicate(), null);
+        assertTrue(AllPredicate.allPredicate(truePredicate(), truePredicate(), truePredicate()).evaluate(null));
+        assertFalse(AllPredicate.allPredicate(truePredicate(), FalsePredicate.falsePredicate(), truePredicate()).evaluate(null));
+        assertFalse(AllPredicate.allPredicate(FalsePredicate.falsePredicate(), FalsePredicate.falsePredicate(), truePredicate()).evaluate(null));
+        assertFalse(AllPredicate.allPredicate(FalsePredicate.falsePredicate(), FalsePredicate.falsePredicate(), FalsePredicate.falsePredicate()).evaluate(null));
         final Collection<Predicate<Object>> coll = new ArrayList<>();
         coll.add(TruePredicate.truePredicate());
         coll.add(TruePredicate.truePredicate());
         coll.add(TruePredicate.truePredicate());
-        assertEquals(true, AllPredicate.allPredicate(coll).evaluate(null));
+        assertTrue(AllPredicate.allPredicate(coll).evaluate(null));
         coll.clear();
         coll.add(TruePredicate.truePredicate());
         coll.add(FalsePredicate.falsePredicate());
         coll.add(TruePredicate.truePredicate());
-        assertEquals(false, AllPredicate.allPredicate(coll).evaluate(null));
+        assertFalse(AllPredicate.allPredicate(coll).evaluate(null));
         coll.clear();
         coll.add(FalsePredicate.falsePredicate());
         coll.add(FalsePredicate.falsePredicate());
         coll.add(TruePredicate.truePredicate());
-        assertEquals(false, AllPredicate.allPredicate(coll).evaluate(null));
+        assertFalse(AllPredicate.allPredicate(coll).evaluate(null));
         coll.clear();
         coll.add(FalsePredicate.falsePredicate());
         coll.add(FalsePredicate.falsePredicate());
         coll.add(FalsePredicate.falsePredicate());
-        assertEquals(false, AllPredicate.allPredicate(coll).evaluate(null));
+        assertFalse(AllPredicate.allPredicate(coll).evaluate(null));
         coll.clear();
         coll.add(FalsePredicate.falsePredicate());
-        assertFalse(AllPredicate.allPredicate(coll), null);
+        assertPredicateFalse(AllPredicate.allPredicate(coll), null);
         coll.clear();
         coll.add(TruePredicate.truePredicate());
-        assertTrue(AllPredicate.allPredicate(coll), null);
+        assertPredicateTrue(AllPredicate.allPredicate(coll), null);
         coll.clear();
-        assertTrue(AllPredicate.allPredicate(coll), null);
+        assertPredicateTrue(AllPredicate.allPredicate(coll), null);
     }
 
     @Test(expected=NullPointerException.class)
@@ -206,10 +203,9 @@ public class PredicateUtilsTest extends AbstractPredicateTest {
         AllPredicate.<Object>allPredicate(new Predicate[] { null });
     }
 
-    @SuppressWarnings("unchecked")
     @Test(expected=NullPointerException.class)
     public void testAllPredicateEx3() {
-        AllPredicate.allPredicate(new Predicate[] { null, null });
+        AllPredicate.allPredicate(null, null);
     }
 
     @Test(expected=NullPointerException.class)
@@ -219,7 +215,7 @@ public class PredicateUtilsTest extends AbstractPredicateTest {
 
     @Test
     public void testAllPredicateEx5() {
-        AllPredicate.allPredicate(Collections.<Predicate<Object>>emptyList());
+        AllPredicate.allPredicate(Collections.emptyList());
     }
 
     @Test(expected=NullPointerException.class)
@@ -235,10 +231,10 @@ public class PredicateUtilsTest extends AbstractPredicateTest {
 
     @Test
     public void testOrPredicate() {
-        assertEquals(true, PredicateUtils.orPredicate(TruePredicate.truePredicate(), TruePredicate.truePredicate()).evaluate(null));
-        assertEquals(true, PredicateUtils.orPredicate(TruePredicate.truePredicate(), FalsePredicate.falsePredicate()).evaluate(null));
-        assertEquals(true, PredicateUtils.orPredicate(FalsePredicate.falsePredicate(), TruePredicate.truePredicate()).evaluate(null));
-        assertEquals(false, PredicateUtils.orPredicate(FalsePredicate.falsePredicate(), FalsePredicate.falsePredicate()).evaluate(null));
+        assertTrue(PredicateUtils.orPredicate(truePredicate(), truePredicate()).evaluate(null));
+        assertTrue(PredicateUtils.orPredicate(truePredicate(), FalsePredicate.falsePredicate()).evaluate(null));
+        assertTrue(PredicateUtils.orPredicate(FalsePredicate.falsePredicate(), truePredicate()).evaluate(null));
+        assertFalse(PredicateUtils.orPredicate(FalsePredicate.falsePredicate(), FalsePredicate.falsePredicate()).evaluate(null));
     }
 
     @Test(expected=NullPointerException.class)
@@ -252,44 +248,40 @@ public class PredicateUtilsTest extends AbstractPredicateTest {
     @SuppressWarnings("unchecked")
     @Test
     public void testAnyPredicate() {
-        assertFalse(PredicateUtils.anyPredicate(new Predicate[] {}), null);
-
-        assertEquals(true, PredicateUtils.anyPredicate(new Predicate[] {
-                TruePredicate.truePredicate(), TruePredicate.truePredicate(), TruePredicate.truePredicate()}).evaluate(null));
-        assertEquals(true, PredicateUtils.anyPredicate(new Predicate[] {
-                TruePredicate.truePredicate(), FalsePredicate.falsePredicate(), TruePredicate.truePredicate()}).evaluate(null));
-        assertEquals(true, PredicateUtils.anyPredicate(new Predicate[] {
-                FalsePredicate.falsePredicate(), FalsePredicate.falsePredicate(), TruePredicate.truePredicate()}).evaluate(null));
-        assertEquals(false, PredicateUtils.anyPredicate(new Predicate[] {
-                FalsePredicate.falsePredicate(), FalsePredicate.falsePredicate(), FalsePredicate.falsePredicate()}).evaluate(null));
+        assertPredicateFalse(PredicateUtils.anyPredicate(), null);
+
+        assertTrue(PredicateUtils.anyPredicate(truePredicate(), truePredicate(), truePredicate()).evaluate(null));
+        assertTrue(PredicateUtils.anyPredicate(truePredicate(), FalsePredicate.falsePredicate(), truePredicate()).evaluate(null));
+        assertTrue(PredicateUtils.anyPredicate(FalsePredicate.falsePredicate(), FalsePredicate.falsePredicate(), truePredicate()).evaluate(null));
+        assertFalse(PredicateUtils.anyPredicate(FalsePredicate.falsePredicate(), FalsePredicate.falsePredicate(), FalsePredicate.falsePredicate()).evaluate(null));
         final Collection<Predicate<Object>> coll = new ArrayList<>();
         coll.add(TruePredicate.truePredicate());
         coll.add(TruePredicate.truePredicate());
         coll.add(TruePredicate.truePredicate());
-        assertEquals(true, PredicateUtils.anyPredicate(coll).evaluate(null));
+        assertTrue(PredicateUtils.anyPredicate(coll).evaluate(null));
         coll.clear();
         coll.add(TruePredicate.truePredicate());
         coll.add(FalsePredicate.falsePredicate());
         coll.add(TruePredicate.truePredicate());
-        assertEquals(true, PredicateUtils.anyPredicate(coll).evaluate(null));
+        assertTrue(PredicateUtils.anyPredicate(coll).evaluate(null));
         coll.clear();
         coll.add(FalsePredicate.falsePredicate());
         coll.add(FalsePredicate.falsePredicate());
         coll.add(TruePredicate.truePredicate());
-        assertEquals(true, PredicateUtils.anyPredicate(coll).evaluate(null));
+        assertTrue(PredicateUtils.anyPredicate(coll).evaluate(null));
         coll.clear();
         coll.add(FalsePredicate.falsePredicate());
         coll.add(FalsePredicate.falsePredicate());
         coll.add(FalsePredicate.falsePredicate());
-        assertEquals(false, PredicateUtils.anyPredicate(coll).evaluate(null));
+        assertFalse(PredicateUtils.anyPredicate(coll).evaluate(null));
         coll.clear();
         coll.add(FalsePredicate.falsePredicate());
-        assertFalse(PredicateUtils.anyPredicate(coll), null);
+        assertPredicateFalse(PredicateUtils.anyPredicate(coll), null);
         coll.clear();
         coll.add(TruePredicate.truePredicate());
-        assertTrue(PredicateUtils.anyPredicate(coll), null);
+        assertPredicateTrue(PredicateUtils.anyPredicate(coll), null);
         coll.clear();
-        assertFalse(PredicateUtils.anyPredicate(coll), null);
+        assertPredicateFalse(PredicateUtils.anyPredicate(coll), null);
     }
 
     @Test(expected=NullPointerException.class)
@@ -303,10 +295,9 @@ public class PredicateUtilsTest extends AbstractPredicateTest {
         PredicateUtils.anyPredicate(new Predicate[] {null});
     }
 
-    @SuppressWarnings("unchecked")
     @Test(expected=NullPointerException.class)
     public void testAnyPredicateEx3() {
-        PredicateUtils.anyPredicate(new Predicate[] {null, null});
+        PredicateUtils.anyPredicate(null, null);
     }
 
     @Test(expected=NullPointerException.class)
@@ -316,7 +307,7 @@ public class PredicateUtilsTest extends AbstractPredicateTest {
 
     @Test
     public void testAnyPredicateEx5() {
-        PredicateUtils.anyPredicate(Collections.<Predicate<Object>>emptyList());
+        PredicateUtils.anyPredicate(Collections.emptyList());
     }
 
     @Test(expected=NullPointerException.class)
@@ -332,10 +323,10 @@ public class PredicateUtilsTest extends AbstractPredicateTest {
 
     @Test
     public void testEitherPredicate() {
-        assertEquals(false, PredicateUtils.eitherPredicate(TruePredicate.truePredicate(), TruePredicate.truePredicate()).evaluate(null));
-        assertEquals(true, PredicateUtils.eitherPredicate(TruePredicate.truePredicate(), FalsePredicate.falsePredicate()).evaluate(null));
-        assertEquals(true, PredicateUtils.eitherPredicate(FalsePredicate.falsePredicate(), TruePredicate.truePredicate()).evaluate(null));
-        assertEquals(false, PredicateUtils.eitherPredicate(FalsePredicate.falsePredicate(), FalsePredicate.falsePredicate()).evaluate(null));
+        assertFalse(PredicateUtils.eitherPredicate(truePredicate(), truePredicate()).evaluate(null));
+        assertTrue(PredicateUtils.eitherPredicate(truePredicate(), FalsePredicate.falsePredicate()).evaluate(null));
+        assertTrue(PredicateUtils.eitherPredicate(FalsePredicate.falsePredicate(), truePredicate()).evaluate(null));
+        assertFalse(PredicateUtils.eitherPredicate(FalsePredicate.falsePredicate(), FalsePredicate.falsePredicate()).evaluate(null));
     }
 
     @Test(expected=NullPointerException.class)
@@ -349,47 +340,41 @@ public class PredicateUtilsTest extends AbstractPredicateTest {
     @SuppressWarnings("unchecked")
     @Test
     public void testOnePredicate() {
-        assertFalse(PredicateUtils.onePredicate((Predicate<Object>[]) new Predicate[] {}), null);
-        assertEquals(false, PredicateUtils.onePredicate(new Predicate[] {
-            TruePredicate.truePredicate(), TruePredicate.truePredicate(), TruePredicate.truePredicate()}).evaluate(null));
-        assertEquals(false, PredicateUtils.onePredicate(new Predicate[] {
-                TruePredicate.truePredicate(), FalsePredicate.falsePredicate(), TruePredicate.truePredicate()}).evaluate(null));
-        assertEquals(true, PredicateUtils.onePredicate(new Predicate[] {
-                TruePredicate.truePredicate(), FalsePredicate.falsePredicate(), FalsePredicate.falsePredicate()}).evaluate(null));
-        assertEquals(true, PredicateUtils.onePredicate(new Predicate[] {
-                FalsePredicate.falsePredicate(), TruePredicate.truePredicate(), FalsePredicate.falsePredicate()}).evaluate(null));
-        assertEquals(true, PredicateUtils.onePredicate(new Predicate[] {
-                FalsePredicate.falsePredicate(), FalsePredicate.falsePredicate(), TruePredicate.truePredicate()}).evaluate(null));
-        assertEquals(false, PredicateUtils.onePredicate(new Predicate[] {
-                FalsePredicate.falsePredicate(), FalsePredicate.falsePredicate(), FalsePredicate.falsePredicate()}).evaluate(null));
+        assertPredicateFalse(PredicateUtils.onePredicate((Predicate<Object>[]) new Predicate[] {}), null);
+        assertFalse(PredicateUtils.onePredicate(truePredicate(), truePredicate(), truePredicate()).evaluate(null));
+        assertFalse(PredicateUtils.onePredicate(truePredicate(), FalsePredicate.falsePredicate(), truePredicate()).evaluate(null));
+        assertTrue(PredicateUtils.onePredicate(truePredicate(), FalsePredicate.falsePredicate(), FalsePredicate.falsePredicate()).evaluate(null));
+        assertTrue(PredicateUtils.onePredicate(FalsePredicate.falsePredicate(), truePredicate(), FalsePredicate.falsePredicate()).evaluate(null));
+        assertTrue(PredicateUtils.onePredicate(FalsePredicate.falsePredicate(), FalsePredicate.falsePredicate(), truePredicate()).evaluate(null));
+        assertFalse(PredicateUtils.onePredicate(FalsePredicate.falsePredicate(), FalsePredicate.falsePredicate(), FalsePredicate.falsePredicate()).evaluate(null));
         final Collection<Predicate<Object>> coll = new ArrayList<>();
         coll.add(TruePredicate.truePredicate());
         coll.add(TruePredicate.truePredicate());
         coll.add(TruePredicate.truePredicate());
-        assertEquals(false, PredicateUtils.onePredicate(coll).evaluate(null));
+        assertFalse(PredicateUtils.onePredicate(coll).evaluate(null));
         coll.clear();
         coll.add(TruePredicate.truePredicate());
         coll.add(FalsePredicate.falsePredicate());
         coll.add(TruePredicate.truePredicate());
-        assertEquals(false, PredicateUtils.onePredicate(coll).evaluate(null));
+        assertFalse(PredicateUtils.onePredicate(coll).evaluate(null));
         coll.clear();
         coll.add(FalsePredicate.falsePredicate());
         coll.add(FalsePredicate.falsePredicate());
         coll.add(TruePredicate.truePredicate());
-        assertEquals(true, PredicateUtils.onePredicate(coll).evaluate(null));
+        assertTrue(PredicateUtils.onePredicate(coll).evaluate(null));
         coll.clear();
         coll.add(FalsePredicate.falsePredicate());
         coll.add(FalsePredicate.falsePredicate());
         coll.add(FalsePredicate.falsePredicate());
-        assertEquals(false, PredicateUtils.onePredicate(coll).evaluate(null));
+        assertFalse(PredicateUtils.onePredicate(coll).evaluate(null));
         coll.clear();
         coll.add(FalsePredicate.falsePredicate());
-        assertFalse(PredicateUtils.onePredicate(coll), null);
+        assertPredicateFalse(PredicateUtils.onePredicate(coll), null);
         coll.clear();
         coll.add(TruePredicate.truePredicate());
-        assertTrue(PredicateUtils.onePredicate(coll), null);
+        assertPredicateTrue(PredicateUtils.onePredicate(coll), null);
         coll.clear();
-        assertFalse(PredicateUtils.onePredicate(coll), null);
+        assertPredicateFalse(PredicateUtils.onePredicate(coll), null);
     }
 
     @Test(expected=NullPointerException.class)
@@ -403,10 +388,9 @@ public class PredicateUtilsTest extends AbstractPredicateTest {
         PredicateUtils.onePredicate(new Predicate[] {null});
     }
 
-    @SuppressWarnings("unchecked")
     @Test(expected=NullPointerException.class)
     public void testOnePredicateEx3() {
-        PredicateUtils.onePredicate(new Predicate[] {null, null});
+        PredicateUtils.onePredicate(null, null);
     }
 
     @Test(expected=NullPointerException.class)
@@ -422,10 +406,7 @@ public class PredicateUtilsTest extends AbstractPredicateTest {
 
     @Test(expected=NullPointerException.class)
     public void testOnePredicateEx6() {
-        final Collection<Predicate<Object>> coll = new ArrayList<>();
-        coll.add(null);
-        coll.add(null);
-        PredicateUtils.onePredicate(coll);
+        PredicateUtils.onePredicate(Arrays.asList(null, null));
     }
 
     // neitherPredicate
@@ -433,10 +414,10 @@ public class PredicateUtilsTest extends AbstractPredicateTest {
 
     @Test
     public void testNeitherPredicate() {
-        assertEquals(false, PredicateUtils.neitherPredicate(TruePredicate.truePredicate(), TruePredicate.truePredicate()).evaluate(null));
-        assertEquals(false, PredicateUtils.neitherPredicate(TruePredicate.truePredicate(), FalsePredicate.falsePredicate()).evaluate(null));
-        assertEquals(false, PredicateUtils.neitherPredicate(FalsePredicate.falsePredicate(), TruePredicate.truePredicate()).evaluate(null));
-        assertEquals(true, PredicateUtils.neitherPredicate(FalsePredicate.falsePredicate(), FalsePredicate.falsePredicate()).evaluate(null));
+        assertFalse(PredicateUtils.neitherPredicate(truePredicate(), truePredicate()).evaluate(null));
+        assertFalse(PredicateUtils.neitherPredicate(truePredicate(), FalsePredicate.falsePredicate()).evaluate(null));
+        assertFalse(PredicateUtils.neitherPredicate(FalsePredicate.falsePredicate(), truePredicate()).evaluate(null));
+        assertTrue(PredicateUtils.neitherPredicate(FalsePredicate.falsePredicate(), FalsePredicate.falsePredicate()).evaluate(null));
     }
 
     @Test(expected=NullPointerException.class)
@@ -450,43 +431,39 @@ public class PredicateUtilsTest extends AbstractPredicateTest {
     @SuppressWarnings("unchecked")
     @Test
     public void testNonePredicate() {
-        assertTrue(PredicateUtils.nonePredicate(new Predicate[] {}), null);
-        assertEquals(false, PredicateUtils.nonePredicate(new Predicate[] {
-                TruePredicate.truePredicate(), TruePredicate.truePredicate(), TruePredicate.truePredicate() }).evaluate(null));
-        assertEquals(false, PredicateUtils.nonePredicate(new Predicate[] {
-                TruePredicate.truePredicate(), FalsePredicate.falsePredicate(), TruePredicate.truePredicate() }).evaluate(null));
-        assertEquals(false, PredicateUtils.nonePredicate(new Predicate[] {
-                FalsePredicate.falsePredicate(), FalsePredicate.falsePredicate(), TruePredicate.truePredicate() }).evaluate(null));
-        assertEquals(true, PredicateUtils.nonePredicate(new Predicate[] {
-                FalsePredicate.falsePredicate(), FalsePredicate.falsePredicate(), FalsePredicate.falsePredicate() }).evaluate(null));
+        assertPredicateTrue(PredicateUtils.nonePredicate(), null);
+        assertFalse(PredicateUtils.nonePredicate(truePredicate(), truePredicate(), truePredicate()).evaluate(null));
+        assertFalse(PredicateUtils.nonePredicate(truePredicate(), FalsePredicate.falsePredicate(), truePredicate()).evaluate(null));
+        assertFalse(PredicateUtils.nonePredicate(FalsePredicate.falsePredicate(), FalsePredicate.falsePredicate(), truePredicate()).evaluate(null));
+        assertTrue(PredicateUtils.nonePredicate(FalsePredicate.falsePredicate(), FalsePredicate.falsePredicate(), FalsePredicate.falsePredicate()).evaluate(null));
         final Collection<Predicate<Object>> coll = new ArrayList<>();
         coll.add(TruePredicate.truePredicate());
         coll.add(TruePredicate.truePredicate());
         coll.add(TruePredicate.truePredicate());
-        assertEquals(false, PredicateUtils.nonePredicate(coll).evaluate(null));
+        assertFalse(PredicateUtils.nonePredicate(coll).evaluate(null));
         coll.clear();
         coll.add(TruePredicate.truePredicate());
         coll.add(FalsePredicate.falsePredicate());
         coll.add(TruePredicate.truePredicate());
-        assertEquals(false, PredicateUtils.nonePredicate(coll).evaluate(null));
+        assertFalse(PredicateUtils.nonePredicate(coll).evaluate(null));
         coll.clear();
         coll.add(FalsePredicate.falsePredicate());
         coll.add(FalsePredicate.falsePredicate());
         coll.add(TruePredicate.truePredicate());
-        assertEquals(false, PredicateUtils.nonePredicate(coll).evaluate(null));
+        assertFalse(PredicateUtils.nonePredicate(coll).evaluate(null));
         coll.clear();
         coll.add(FalsePredicate.falsePredicate());
         coll.add(FalsePredicate.falsePredicate());
         coll.add(FalsePredicate.falsePredicate());
-        assertEquals(true, PredicateUtils.nonePredicate(coll).evaluate(null));
+        assertTrue(PredicateUtils.nonePredicate(coll).evaluate(null));
         coll.clear();
         coll.add(FalsePredicate.falsePredicate());
-        assertTrue(PredicateUtils.nonePredicate(coll), null);
+        assertPredicateTrue(PredicateUtils.nonePredicate(coll), null);
         coll.clear();
         coll.add(TruePredicate.truePredicate());
-        assertFalse(PredicateUtils.nonePredicate(coll), null);
+        assertPredicateFalse(PredicateUtils.nonePredicate(coll), null);
         coll.clear();
-        assertTrue(PredicateUtils.nonePredicate(coll), null);
+        assertPredicateTrue(PredicateUtils.nonePredicate(coll), null);
     }
 
     @Test(expected=NullPointerException.class)
@@ -503,7 +480,7 @@ public class PredicateUtilsTest extends AbstractPredicateTest {
     @SuppressWarnings("unchecked")
     @Test(expected=NullPointerException.class)
     public void testNonePredicateEx3() {
-        PredicateUtils.nonePredicate(new Predicate[] {null, null});
+        PredicateUtils.nonePredicate(null, null);
     }
 
     @Test(expected=NullPointerException.class)
@@ -513,7 +490,7 @@ public class PredicateUtilsTest extends AbstractPredicateTest {
 
     @Test
     public void testNonePredicateEx5() {
-        PredicateUtils.nonePredicate(Collections.<Predicate<Object>>emptyList());
+        PredicateUtils.nonePredicate(Collections.emptyList());
     }
 
     @Test(expected=NullPointerException.class)
@@ -530,10 +507,10 @@ public class PredicateUtilsTest extends AbstractPredicateTest {
     @Test
     public void testInstanceOfPredicate() {
         assertNotNull(PredicateUtils.instanceofPredicate(String.class));
-        assertEquals(false, PredicateUtils.instanceofPredicate(String.class).evaluate(null));
-        assertEquals(false, PredicateUtils.instanceofPredicate(String.class).evaluate(cObject));
-        assertEquals(true, PredicateUtils.instanceofPredicate(String.class).evaluate(cString));
-        assertEquals(false, PredicateUtils.instanceofPredicate(String.class).evaluate(cInteger));
+        assertFalse(PredicateUtils.instanceofPredicate(String.class).evaluate(null));
+        assertFalse(PredicateUtils.instanceofPredicate(String.class).evaluate(cObject));
+        assertTrue(PredicateUtils.instanceofPredicate(String.class).evaluate(cString));
+        assertFalse(PredicateUtils.instanceofPredicate(String.class).evaluate(cInteger));
     }
 
     // uniquePredicate
@@ -542,12 +519,12 @@ public class PredicateUtilsTest extends AbstractPredicateTest {
     @Test
     public void testUniquePredicate() {
         final Predicate<Object> p = PredicateUtils.uniquePredicate();
-        assertEquals(true, p.evaluate(new Object()));
-        assertEquals(true, p.evaluate(new Object()));
-        assertEquals(true, p.evaluate(new Object()));
-        assertEquals(true, p.evaluate(cString));
-        assertEquals(false, p.evaluate(cString));
-        assertEquals(false, p.evaluate(cString));
+        assertTrue(p.evaluate(new Object()));
+        assertTrue(p.evaluate(new Object()));
+        assertTrue(p.evaluate(new Object()));
+        assertTrue(p.evaluate(cString));
+        assertFalse(p.evaluate(cString));
+        assertFalse(p.evaluate(cString));
     }
 
     // asPredicate(Transformer)
@@ -555,8 +532,8 @@ public class PredicateUtilsTest extends AbstractPredicateTest {
 
     @Test
     public void testAsPredicateTransformer() {
-        assertEquals(false, PredicateUtils.asPredicate(TransformerUtils.<Boolean>nopTransformer()).evaluate(false));
-        assertEquals(true, PredicateUtils.asPredicate(TransformerUtils.<Boolean>nopTransformer()).evaluate(true));
+        assertFalse(PredicateUtils.asPredicate(TransformerUtils.nopTransformer()).evaluate(false));
+        assertTrue(PredicateUtils.asPredicate(TransformerUtils.nopTransformer()).evaluate(true));
     }
 
     @Test(expected=NullPointerException.class)
@@ -566,7 +543,7 @@ public class PredicateUtilsTest extends AbstractPredicateTest {
 
     @Test(expected=FunctorException.class)
     public void testAsPredicateTransformerEx2() {
-        PredicateUtils.asPredicate(TransformerUtils.<Boolean>nopTransformer()).evaluate(null);
+        PredicateUtils.asPredicate(TransformerUtils.nopTransformer()).evaluate(null);
     }
 
     // invokerPredicate
@@ -575,9 +552,9 @@ public class PredicateUtilsTest extends AbstractPredicateTest {
     @Test
     public void testInvokerPredicate() {
         final List<Object> list = new ArrayList<>();
-        assertEquals(true, PredicateUtils.invokerPredicate("isEmpty").evaluate(list));
+        assertTrue(PredicateUtils.invokerPredicate("isEmpty").evaluate(list));
         list.add(new Object());
-        assertEquals(false, PredicateUtils.invokerPredicate("isEmpty").evaluate(list));
+        assertFalse(PredicateUtils.invokerPredicate("isEmpty").evaluate(list));
     }
 
     @Test(expected=NullPointerException.class)
@@ -601,11 +578,11 @@ public class PredicateUtilsTest extends AbstractPredicateTest {
     @Test
     public void testInvokerPredicate2() {
         final List<String> list = new ArrayList<>();
-        assertEquals(false, PredicateUtils.invokerPredicate(
-            "contains", new Class[] {Object.class}, new Object[] {cString}).evaluate(list));
+        assertFalse(PredicateUtils.invokerPredicate(
+                "contains", new Class[]{Object.class}, new Object[]{cString}).evaluate(list));
         list.add(cString);
-        assertEquals(true, PredicateUtils.invokerPredicate(
-            "contains", new Class[] {Object.class}, new Object[] {cString}).evaluate(list));
+        assertTrue(PredicateUtils.invokerPredicate(
+                "contains", new Class[]{Object.class}, new Object[]{cString}).evaluate(list));
     }
 
     @Test(expected=NullPointerException.class)
@@ -629,7 +606,7 @@ public class PredicateUtilsTest extends AbstractPredicateTest {
 
     @Test(expected=FunctorException.class)
     public void testNullIsExceptionPredicate() {
-        assertEquals(true, PredicateUtils.nullIsExceptionPredicate(TruePredicate.truePredicate()).evaluate(new Object()));
+        assertTrue(PredicateUtils.nullIsExceptionPredicate(truePredicate()).evaluate(new Object()));
         PredicateUtils.nullIsExceptionPredicate(TruePredicate.truePredicate()).evaluate(null);
     }
 
@@ -643,9 +620,9 @@ public class PredicateUtilsTest extends AbstractPredicateTest {
 
     @Test
     public void testNullIsTruePredicate() {
-        assertEquals(true, PredicateUtils.nullIsTruePredicate(TruePredicate.truePredicate()).evaluate(null));
-        assertEquals(true, PredicateUtils.nullIsTruePredicate(TruePredicate.truePredicate()).evaluate(new Object()));
-        assertEquals(false, PredicateUtils.nullIsTruePredicate(FalsePredicate.falsePredicate()).evaluate(new Object()));
+        assertTrue(PredicateUtils.nullIsTruePredicate(truePredicate()).evaluate(null));
+        assertTrue(PredicateUtils.nullIsTruePredicate(truePredicate()).evaluate(new Object()));
+        assertFalse(PredicateUtils.nullIsTruePredicate(FalsePredicate.falsePredicate()).evaluate(new Object()));
     }
 
     @Test(expected=NullPointerException.class)
@@ -658,9 +635,9 @@ public class PredicateUtilsTest extends AbstractPredicateTest {
 
     @Test
     public void testNullIsFalsePredicate() {
-        assertEquals(false, PredicateUtils.nullIsFalsePredicate(TruePredicate.truePredicate()).evaluate(null));
-        assertEquals(true, PredicateUtils.nullIsFalsePredicate(TruePredicate.truePredicate()).evaluate(new Object()));
-        assertEquals(false, PredicateUtils.nullIsFalsePredicate(FalsePredicate.falsePredicate()).evaluate(new Object()));
+        assertFalse(PredicateUtils.nullIsFalsePredicate(truePredicate()).evaluate(null));
+        assertTrue(PredicateUtils.nullIsFalsePredicate(truePredicate()).evaluate(new Object()));
+        assertFalse(PredicateUtils.nullIsFalsePredicate(FalsePredicate.falsePredicate()).evaluate(new Object()));
     }
 
     @Test(expected=NullPointerException.class)
@@ -673,16 +650,16 @@ public class PredicateUtilsTest extends AbstractPredicateTest {
 
     @Test
     public void testTransformedPredicate() {
-        assertEquals(true, PredicateUtils.transformedPredicate(
+        assertTrue(PredicateUtils.transformedPredicate(
                 TransformerUtils.nopTransformer(),
-                TruePredicate.truePredicate()).evaluate(new Object()));
+                truePredicate()).evaluate(new Object()));
 
         final Map<Object, Object> map = new HashMap<>();
         map.put(Boolean.TRUE, "Hello");
         final Transformer<Object, Object> t = TransformerUtils.mapTransformer(map);
         final Predicate<Object> p = EqualPredicate.<Object>equalPredicate("Hello");
-        assertEquals(false, PredicateUtils.transformedPredicate(t, p).evaluate(null));
-        assertEquals(true, PredicateUtils.transformedPredicate(t, p).evaluate(Boolean.TRUE));
+        assertFalse(PredicateUtils.transformedPredicate(t, p).evaluate(null));
+        assertTrue(PredicateUtils.transformedPredicate(t, p).evaluate(Boolean.TRUE));
         try {
             PredicateUtils.transformedPredicate(null, null);
             fail();
diff --git a/src/test/java/org/apache/commons/collections4/SetUtilsTest.java b/src/test/java/org/apache/commons/collections4/SetUtilsTest.java
index 123d66c..7936129 100644
--- a/src/test/java/org/apache/commons/collections4/SetUtilsTest.java
+++ b/src/test/java/org/apache/commons/collections4/SetUtilsTest.java
@@ -18,6 +18,8 @@ package org.apache.commons.collections4;
 
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertNotEquals;
+import static org.junit.Assert.assertNull;
 import static org.junit.Assert.assertSame;
 import static org.junit.Assert.assertTrue;
 import static org.junit.Assert.fail;
@@ -161,13 +163,13 @@ public class SetUtilsTest {
         final Set<String> a = new HashSet<>(data);
         final Set<String> b = new HashSet<>(data);
 
-        assertEquals(true, a.equals(b));
-        assertEquals(true, SetUtils.isEqualSet(a, b));
+        assertEquals(a, b);
+        assertTrue(SetUtils.isEqualSet(a, b));
         a.clear();
-        assertEquals(false, SetUtils.isEqualSet(a, b));
-        assertEquals(false, SetUtils.isEqualSet(a, null));
-        assertEquals(false, SetUtils.isEqualSet(null, b));
-        assertEquals(true, SetUtils.isEqualSet(null, null));
+        assertFalse(SetUtils.isEqualSet(a, b));
+        assertFalse(SetUtils.isEqualSet(a, null));
+        assertFalse(SetUtils.isEqualSet(null, b));
+        assertTrue(SetUtils.isEqualSet(null, null));
     }
 
     @Test
@@ -177,12 +179,12 @@ public class SetUtilsTest {
         final Set<String> a = new HashSet<>(data);
         final Set<String> b = new HashSet<>(data);
 
-        assertEquals(true, a.hashCode() == b.hashCode());
-        assertEquals(true, a.hashCode() == SetUtils.hashCodeForSet(a));
-        assertEquals(true, b.hashCode() == SetUtils.hashCodeForSet(b));
-        assertEquals(true, SetUtils.hashCodeForSet(a) == SetUtils.hashCodeForSet(b));
+        assertEquals(a.hashCode(), b.hashCode());
+        assertEquals(a.hashCode(), SetUtils.hashCodeForSet(a));
+        assertEquals(b.hashCode(), SetUtils.hashCodeForSet(b));
+        assertEquals(SetUtils.hashCodeForSet(a), SetUtils.hashCodeForSet(b));
         a.clear();
-        assertEquals(false, SetUtils.hashCodeForSet(a) == SetUtils.hashCodeForSet(b));
+        assertNotEquals(SetUtils.hashCodeForSet(a), SetUtils.hashCodeForSet(b));
         assertEquals(0, SetUtils.hashCodeForSet(null));
     }
 
@@ -208,7 +210,7 @@ public class SetUtilsTest {
         assertTrue("set contains null", set4.contains(null));
 
         final Set<?> set5 = SetUtils.hashSet((Object[]) null);
-        assertEquals("set is null", null, set5);
+        assertNull("set is null", set5);
     }
 
     @Test
@@ -269,7 +271,7 @@ public class SetUtilsTest {
         assertTrue("set contains null", set4.contains(null));
 
         final Set<?> set5 = SetUtils.unmodifiableSet((Object[]) null);
-        assertEquals("set is null", null, set5);
+        assertNull("set is null", set5);
     }
 
     @Test
diff --git a/src/test/java/org/apache/commons/collections4/TransformerUtilsTest.java b/src/test/java/org/apache/commons/collections4/TransformerUtilsTest.java
index b9f9679..196d74c 100644
--- a/src/test/java/org/apache/commons/collections4/TransformerUtilsTest.java
+++ b/src/test/java/org/apache/commons/collections4/TransformerUtilsTest.java
@@ -18,6 +18,7 @@ package org.apache.commons.collections4;
 
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertNull;
 import static org.junit.Assert.assertSame;
 import static org.junit.Assert.fail;
 
@@ -75,10 +76,10 @@ public class TransformerUtilsTest {
     public void testNullTransformer() {
         assertNotNull(TransformerUtils.nullTransformer());
         assertSame(TransformerUtils.nullTransformer(), TransformerUtils.nullTransformer());
-        assertEquals(null, TransformerUtils.nullTransformer().transform(null));
-        assertEquals(null, TransformerUtils.nullTransformer().transform(cObject));
-        assertEquals(null, TransformerUtils.nullTransformer().transform(cString));
-        assertEquals(null, TransformerUtils.nullTransformer().transform(cInteger));
+        assertNull(TransformerUtils.nullTransformer().transform(null));
+        assertNull(TransformerUtils.nullTransformer().transform(cObject));
+        assertNull(TransformerUtils.nullTransformer().transform(cString));
+        assertNull(TransformerUtils.nullTransformer().transform(cInteger));
     }
 
     // nopTransformer
@@ -88,7 +89,7 @@ public class TransformerUtilsTest {
     public void testNopTransformer() {
         assertNotNull(TransformerUtils.nullTransformer());
         assertSame(TransformerUtils.nullTransformer(), TransformerUtils.nullTransformer());
-        assertEquals(null, TransformerUtils.nopTransformer().transform(null));
+        assertNull(TransformerUtils.nopTransformer().transform(null));
         assertEquals(cObject, TransformerUtils.nopTransformer().transform(cObject));
         assertEquals(cString, TransformerUtils.nopTransformer().transform(cString));
         assertEquals(cInteger, TransformerUtils.nopTransformer().transform(cInteger));
@@ -111,7 +112,7 @@ public class TransformerUtilsTest {
 
     @Test
     public void testCloneTransformer() {
-        assertEquals(null, TransformerUtils.cloneTransformer().transform(null));
+        assertNull(TransformerUtils.cloneTransformer().transform(null));
         assertEquals(cString, TransformerUtils.cloneTransformer().transform(cString));
         assertEquals(cInteger, TransformerUtils.cloneTransformer().transform(cInteger));
         try {
@@ -135,7 +136,7 @@ public class TransformerUtilsTest {
         assertEquals(Integer.valueOf(0), TransformerUtils.mapTransformer(map).transform(null));
         assertEquals(Integer.valueOf(1), TransformerUtils.mapTransformer(map).transform(cObject));
         assertEquals(Integer.valueOf(2), TransformerUtils.mapTransformer(map).transform(cString));
-        assertEquals(null, TransformerUtils.mapTransformer(map).transform(cInteger));
+        assertNull(TransformerUtils.mapTransformer(map).transform(cInteger));
         assertSame(ConstantTransformer.NULL_INSTANCE, TransformerUtils.mapTransformer(null));
     }
 
@@ -144,7 +145,7 @@ public class TransformerUtilsTest {
 
     @Test
     public void testExecutorTransformer() {
-        assertEquals(null, TransformerUtils.asTransformer(ClosureUtils.nopClosure()).transform(null));
+        assertNull(TransformerUtils.asTransformer(ClosureUtils.nopClosure()).transform(null));
         assertEquals(cObject, TransformerUtils.asTransformer(ClosureUtils.nopClosure()).transform(cObject));
         assertEquals(cString, TransformerUtils.asTransformer(ClosureUtils.nopClosure()).transform(cString));
         assertEquals(cInteger, TransformerUtils.asTransformer(ClosureUtils.nopClosure()).transform(cInteger));
@@ -178,10 +179,10 @@ public class TransformerUtilsTest {
 
     @Test
     public void testFactoryTransformer() {
-        assertEquals(null, TransformerUtils.asTransformer(FactoryUtils.nullFactory()).transform(null));
-        assertEquals(null, TransformerUtils.asTransformer(FactoryUtils.nullFactory()).transform(cObject));
-        assertEquals(null, TransformerUtils.asTransformer(FactoryUtils.nullFactory()).transform(cString));
-        assertEquals(null, TransformerUtils.asTransformer(FactoryUtils.nullFactory()).transform(cInteger));
+        assertNull(TransformerUtils.asTransformer(FactoryUtils.nullFactory()).transform(null));
+        assertNull(TransformerUtils.asTransformer(FactoryUtils.nullFactory()).transform(cObject));
+        assertNull(TransformerUtils.asTransformer(FactoryUtils.nullFactory()).transform(cString));
+        assertNull(TransformerUtils.asTransformer(FactoryUtils.nullFactory()).transform(cInteger));
         try {
             TransformerUtils.asTransformer((Factory<Object>) null);
         } catch (final NullPointerException ex) {
@@ -249,13 +250,13 @@ public class TransformerUtilsTest {
 
         final Predicate<Integer> lessThanFivePredicate = value -> value < 5;
         // if/else tests
-        assertEquals("A", TransformerUtils.<Integer, String>ifTransformer(lessThanFivePredicate, a, b).transform(1));
-        assertEquals("B", TransformerUtils.<Integer, String>ifTransformer(lessThanFivePredicate, a, b).transform(5));
+        assertEquals("A", TransformerUtils.ifTransformer(lessThanFivePredicate, a, b).transform(1));
+        assertEquals("B", TransformerUtils.ifTransformer(lessThanFivePredicate, a, b).transform(5));
 
         // if tests
         final Predicate<String> equalsAPredicate = EqualPredicate.equalPredicate("A");
-        assertEquals("C", TransformerUtils.<String>ifTransformer(equalsAPredicate, c).transform("A"));
-        assertEquals("B", TransformerUtils.<String>ifTransformer(equalsAPredicate, c).transform("B"));
+        assertEquals("C", TransformerUtils.ifTransformer(equalsAPredicate, c).transform("A"));
+        assertEquals("B", TransformerUtils.ifTransformer(equalsAPredicate, c).transform("B"));
 
         try {
             TransformerUtils.ifTransformer(null, null);
@@ -288,9 +289,9 @@ public class TransformerUtilsTest {
         assertEquals("A", TransformerUtils.switchTransformer(TruePredicate.truePredicate(), a, b).transform(null));
         assertEquals("B", TransformerUtils.switchTransformer(FalsePredicate.falsePredicate(), a, b).transform(null));
 
-        assertEquals(null, TransformerUtils.<Object, String>switchTransformer(
-            new Predicate[] { EqualPredicate.equalPredicate("HELLO"), EqualPredicate.equalPredicate("THERE") },
-            new Transformer[] { a, b }).transform("WELL"));
+        assertNull(TransformerUtils.<Object, String>switchTransformer(
+                new Predicate[]{EqualPredicate.equalPredicate("HELLO"), EqualPredicate.equalPredicate("THERE")},
+                new Transformer[]{a, b}).transform("WELL"));
         assertEquals("A", TransformerUtils.switchTransformer(
             new Predicate[] { EqualPredicate.equalPredicate("HELLO"), EqualPredicate.equalPredicate("THERE") },
             new Transformer[] { a, b }).transform("HELLO"));
@@ -305,7 +306,7 @@ public class TransformerUtilsTest {
         Map<Predicate<String>, Transformer<String, String>> map = new HashMap<>();
         map.put(EqualPredicate.equalPredicate("HELLO"), a);
         map.put(EqualPredicate.equalPredicate("THERE"), b);
-        assertEquals(null, TransformerUtils.switchTransformer(map).transform("WELL"));
+        assertNull(TransformerUtils.switchTransformer(map).transform("WELL"));
         assertEquals("A", TransformerUtils.switchTransformer(map).transform("HELLO"));
         assertEquals("B", TransformerUtils.switchTransformer(map).transform("THERE"));
         map.put(null, c);
@@ -322,11 +323,11 @@ public class TransformerUtilsTest {
             fail();
         } catch (final NullPointerException ex) {}
         try {
-            TransformerUtils.switchTransformer((Predicate[]) null, (Transformer[]) null);
+            TransformerUtils.switchTransformer(null, (Transformer[]) null);
             fail();
         } catch (final NullPointerException ex) {}
         try {
-            TransformerUtils.switchTransformer((Map<Predicate<Object>, Transformer<Object, Object>>) null);
+            TransformerUtils.switchTransformer(null);
             fail();
         } catch (final NullPointerException ex) {}
         try {
@@ -353,7 +354,7 @@ public class TransformerUtilsTest {
         Map<String, Transformer<String, String>> map = new HashMap<>();
         map.put("HELLO", a);
         map.put("THERE", b);
-        assertEquals(null, TransformerUtils.switchMapTransformer(map).transform("WELL"));
+        assertNull(TransformerUtils.switchMapTransformer(map).transform("WELL"));
         assertEquals("A", TransformerUtils.switchMapTransformer(map).transform("HELLO"));
         assertEquals("B", TransformerUtils.switchMapTransformer(map).transform("THERE"));
         map.put(null, c);
@@ -376,10 +377,10 @@ public class TransformerUtilsTest {
     @Test
     public void testInvokerTransformer() {
         final List<Object> list = new ArrayList<>();
-        assertEquals(Integer.valueOf(0), TransformerUtils.invokerTransformer("size").transform(list));
+        assertEquals(0, TransformerUtils.invokerTransformer("size").transform(list));
         list.add(new Object());
-        assertEquals(Integer.valueOf(1), TransformerUtils.invokerTransformer("size").transform(list));
-        assertEquals(null, TransformerUtils.invokerTransformer("size").transform(null));
+        assertEquals(1, TransformerUtils.invokerTransformer("size").transform(list));
+        assertNull(TransformerUtils.invokerTransformer("size").transform(null));
 
         try {
             TransformerUtils.invokerTransformer(null);
@@ -402,8 +403,8 @@ public class TransformerUtilsTest {
         list.add(cString);
         assertEquals(Boolean.TRUE, TransformerUtils.invokerTransformer("contains",
                 new Class[] { Object.class }, new Object[] { cString }).transform(list));
-        assertEquals(null, TransformerUtils.invokerTransformer("contains",
-                new Class[] { Object.class }, new Object[] { cString }).transform(null));
+        assertNull(TransformerUtils.invokerTransformer("contains",
+                new Class[]{Object.class}, new Object[]{cString}).transform(null));
 
         try {
             TransformerUtils.invokerTransformer(null, null, null);
@@ -438,7 +439,7 @@ public class TransformerUtilsTest {
         assertEquals( "StringValueTransformer should return \"null\" when given a null argument.", "null",
             TransformerUtils.stringValueTransformer().transform(null));
         assertEquals( "StringValueTransformer should return toString value", "6",
-            TransformerUtils.stringValueTransformer().transform(Integer.valueOf(6)));
+            TransformerUtils.stringValueTransformer().transform(6));
     }
 
     // instantiateFactory
@@ -464,7 +465,7 @@ public class TransformerUtilsTest {
         trans = TransformerUtils.instantiateTransformer();
         assertEquals("", trans.transform(String.class));
 
-        trans = TransformerUtils.instantiateTransformer(new Class[] { Long.TYPE }, new Object[] { new Long(1000L) });
+        trans = TransformerUtils.instantiateTransformer(new Class[] { Long.TYPE }, new Object[] {1000L});
         assertEquals(new Date(1000L), trans.transform(Date.class));
     }
 
diff --git a/src/test/java/org/apache/commons/collections4/bag/AbstractBagTest.java b/src/test/java/org/apache/commons/collections4/bag/AbstractBagTest.java
index e6cadd8..969280d 100644
--- a/src/test/java/org/apache/commons/collections4/bag/AbstractBagTest.java
+++ b/src/test/java/org/apache/commons/collections4/bag/AbstractBagTest.java
@@ -33,6 +33,8 @@ import org.apache.commons.collections4.BulkTest;
 import org.apache.commons.collections4.collection.AbstractCollectionTest;
 import org.apache.commons.collections4.set.AbstractSetTest;
 
+import static org.junit.Assert.assertNotEquals;
+
 /**
  * Abstract test class for {@link org.apache.commons.collections4.Bag Bag} methods and contracts.
  * <p>
@@ -76,8 +78,7 @@ public abstract class AbstractBagTest<T> extends AbstractCollectionTest<T> {
      */
     @Override
     public Collection<T> makeConfirmedCollection() {
-        final ArrayList<T> list = new ArrayList<>();
-        return list;
+        return new ArrayList<>();
     }
 
     /**
@@ -155,18 +156,18 @@ public abstract class AbstractBagTest<T> extends AbstractCollectionTest<T> {
     @SuppressWarnings("unchecked")
     public void testBagEqualsSelf() {
         final Bag<T> bag = makeObject();
-        assertTrue(bag.equals(bag));
+        assertEquals(bag, bag);
 
         if (!isAddSupported()) {
             return;
         }
 
         bag.add((T) "elt");
-        assertTrue(bag.equals(bag));
+        assertEquals(bag, bag);
         bag.add((T) "elt"); // again
-        assertTrue(bag.equals(bag));
+        assertEquals(bag, bag);
         bag.add((T) "elt2");
-        assertTrue(bag.equals(bag));
+        assertEquals(bag, bag);
     }
 
     @SuppressWarnings("unchecked")
@@ -223,20 +224,20 @@ public abstract class AbstractBagTest<T> extends AbstractCollectionTest<T> {
 
         final Bag<T> bag = makeObject();
 
-        assertEquals("Bag does not have at least 1 'A'", false, bag.contains("A"));
-        assertEquals("Bag does not have at least 1 'B'", false, bag.contains("B"));
+        assertFalse("Bag does not have at least 1 'A'", bag.contains("A"));
+        assertFalse("Bag does not have at least 1 'B'", bag.contains("B"));
 
         bag.add((T) "A");  // bag 1A
-        assertEquals("Bag has at least 1 'A'", true, bag.contains("A"));
-        assertEquals("Bag does not have at least 1 'B'", false, bag.contains("B"));
+        assertTrue("Bag has at least 1 'A'", bag.contains("A"));
+        assertFalse("Bag does not have at least 1 'B'", bag.contains("B"));
 
         bag.add((T) "A");  // bag 2A
-        assertEquals("Bag has at least 1 'A'", true, bag.contains("A"));
-        assertEquals("Bag does not have at least 1 'B'", false, bag.contains("B"));
+        assertTrue("Bag has at least 1 'A'", bag.contains("A"));
+        assertFalse("Bag does not have at least 1 'B'", bag.contains("B"));
 
         bag.add((T) "B");  // bag 2A,1B
-        assertEquals("Bag has at least 1 'A'", true, bag.contains("A"));
-        assertEquals("Bag has at least 1 'B'", true, bag.contains("B"));
+        assertTrue("Bag has at least 1 'A'", bag.contains("A"));
+        assertTrue("Bag has at least 1 'B'", bag.contains("B"));
     }
 
     @SuppressWarnings("unchecked")
@@ -258,39 +259,39 @@ public abstract class AbstractBagTest<T> extends AbstractCollectionTest<T> {
         known1A1B.add("A");
         known1A1B.add("B");
 
-        assertEquals("Bag containsAll of empty", true, bag.containsAll(known));
-        assertEquals("Bag does not containsAll of 1 'A'", false, bag.containsAll(known1A));
-        assertEquals("Bag does not containsAll of 2 'A'", false, bag.containsAll(known2A));
-        assertEquals("Bag does not containsAll of 1 'B'", false, bag.containsAll(known1B));
-        assertEquals("Bag does not containsAll of 1 'A' 1 'B'", false, bag.containsAll(known1A1B));
+        assertTrue("Bag containsAll of empty", bag.containsAll(known));
+        assertFalse("Bag does not containsAll of 1 'A'", bag.containsAll(known1A));
+        assertFalse("Bag does not containsAll of 2 'A'", bag.containsAll(known2A));
+        assertFalse("Bag does not containsAll of 1 'B'", bag.containsAll(known1B));
+        assertFalse("Bag does not containsAll of 1 'A' 1 'B'", bag.containsAll(known1A1B));
 
         bag.add((T) "A");  // bag 1A
-        assertEquals("Bag containsAll of empty", true, bag.containsAll(known));
-        assertEquals("Bag containsAll of 1 'A'", true, bag.containsAll(known1A));
-        assertEquals("Bag does not containsAll of 2 'A'", false, bag.containsAll(known2A));
-        assertEquals("Bag does not containsAll of 1 'B'", false, bag.containsAll(known1B));
-        assertEquals("Bag does not containsAll of 1 'A' 1 'B'", false, bag.containsAll(known1A1B));
+        assertTrue("Bag containsAll of empty", bag.containsAll(known));
+        assertTrue("Bag containsAll of 1 'A'", bag.containsAll(known1A));
+        assertFalse("Bag does not containsAll of 2 'A'", bag.containsAll(known2A));
+        assertFalse("Bag does not containsAll of 1 'B'", bag.containsAll(known1B));
+        assertFalse("Bag does not containsAll of 1 'A' 1 'B'", bag.containsAll(known1A1B));
 
         bag.add((T) "A");  // bag 2A
-        assertEquals("Bag containsAll of empty", true, bag.containsAll(known));
-        assertEquals("Bag containsAll of 1 'A'", true, bag.containsAll(known1A));
-        assertEquals("Bag containsAll of 2 'A'", true, bag.containsAll(known2A));
-        assertEquals("Bag does not containsAll of 1 'B'", false, bag.containsAll(known1B));
-        assertEquals("Bag does not containsAll of 1 'A' 1 'B'", false, bag.containsAll(known1A1B));
+        assertTrue("Bag containsAll of empty", bag.containsAll(known));
+        assertTrue("Bag containsAll of 1 'A'", bag.containsAll(known1A));
+        assertTrue("Bag containsAll of 2 'A'", bag.containsAll(known2A));
+        assertFalse("Bag does not containsAll of 1 'B'", bag.containsAll(known1B));
+        assertFalse("Bag does not containsAll of 1 'A' 1 'B'", bag.containsAll(known1A1B));
 
         bag.add((T) "A");  // bag 3A
-        assertEquals("Bag containsAll of empty", true, bag.containsAll(known));
-        assertEquals("Bag containsAll of 1 'A'", true, bag.containsAll(known1A));
-        assertEquals("Bag containsAll of 2 'A'", true, bag.containsAll(known2A));
-        assertEquals("Bag does not containsAll of 1 'B'", false, bag.containsAll(known1B));
-        assertEquals("Bag does not containsAll of 1 'A' 1 'B'", false, bag.containsAll(known1A1B));
+        assertTrue("Bag containsAll of empty", bag.containsAll(known));
+        assertTrue("Bag containsAll of 1 'A'", bag.containsAll(known1A));
+        assertTrue("Bag containsAll of 2 'A'", bag.containsAll(known2A));
+        assertFalse("Bag does not containsAll of 1 'B'", bag.containsAll(known1B));
+        assertFalse("Bag does not containsAll of 1 'A' 1 'B'", bag.containsAll(known1A1B));
 
         bag.add((T) "B");  // bag 3A1B
-        assertEquals("Bag containsAll of empty", true, bag.containsAll(known));
-        assertEquals("Bag containsAll of 1 'A'", true, bag.containsAll(known1A));
-        assertEquals("Bag containsAll of 2 'A'", true, bag.containsAll(known2A));
-        assertEquals("Bag containsAll of 1 'B'", true, bag.containsAll(known1B));
-        assertEquals("Bag containsAll of 1 'A' 1 'B'", true, bag.containsAll(known1A1B));
+        assertTrue("Bag containsAll of empty", bag.containsAll(known));
+        assertTrue("Bag containsAll of 1 'A'", bag.containsAll(known1A));
+        assertTrue("Bag containsAll of 2 'A'", bag.containsAll(known2A));
+        assertTrue("Bag containsAll of 1 'B'", bag.containsAll(known1B));
+        assertTrue("Bag containsAll of 1 'A' 1 'B'", bag.containsAll(known1A1B));
     }
 
     @SuppressWarnings("unchecked")
@@ -452,18 +453,18 @@ public abstract class AbstractBagTest<T> extends AbstractCollectionTest<T> {
         assertEquals(2, bag.size());
         final Iterator<T> it = bag.iterator();
         assertEquals("A", it.next());
-        assertEquals(true, it.hasNext());
+        assertTrue(it.hasNext());
         it.remove();
         assertEquals(1, bag.size());
-        assertEquals(true, it.hasNext());
+        assertTrue(it.hasNext());
         assertEquals("A", it.next());
-        assertEquals(false, it.hasNext());
+        assertFalse(it.hasNext());
         it.remove();
         assertEquals(0, bag.size());
-        assertEquals(false, it.hasNext());
+        assertFalse(it.hasNext());
 
         final Iterator<T> it2 = bag.iterator();
-        assertEquals(false, it2.hasNext());
+        assertFalse(it2.hasNext());
     }
 
     @SuppressWarnings("unchecked")
@@ -523,11 +524,11 @@ public abstract class AbstractBagTest<T> extends AbstractCollectionTest<T> {
 
         final Bag<T> bag = makeObject();
         final Bag<T> bag2 = makeObject();
-        assertEquals(true, bag.equals(bag2));
+        assertEquals(bag, bag2);
         bag.add((T) "A");
-        assertEquals(false, bag.equals(bag2));
+        assertNotEquals(bag, bag2);
         bag2.add((T) "A");
-        assertEquals(true, bag.equals(bag2));
+        assertEquals(bag, bag2);
         bag.add((T) "A");
         bag.add((T) "B");
         bag.add((T) "B");
@@ -536,7 +537,7 @@ public abstract class AbstractBagTest<T> extends AbstractCollectionTest<T> {
         bag2.add((T) "B");
         bag2.add((T) "B");
         bag2.add((T) "C");
-        assertEquals(true, bag.equals(bag2));
+        assertEquals(bag, bag2);
     }
 
     @SuppressWarnings("unchecked")
@@ -547,11 +548,11 @@ public abstract class AbstractBagTest<T> extends AbstractCollectionTest<T> {
 
         final Bag<T> bag = makeObject();
         final Bag<T> bag2 = new HashBag<>();
-        assertEquals(true, bag.equals(bag2));
+        assertEquals(bag, bag2);
         bag.add((T) "A");
-        assertEquals(false, bag.equals(bag2));
+        assertNotEquals(bag, bag2);
         bag2.add((T) "A");
-        assertEquals(true, bag.equals(bag2));
+        assertEquals(bag, bag2);
         bag.add((T) "A");
         bag.add((T) "B");
         bag.add((T) "B");
@@ -560,7 +561,7 @@ public abstract class AbstractBagTest<T> extends AbstractCollectionTest<T> {
         bag2.add((T) "B");
         bag2.add((T) "B");
         bag2.add((T) "C");
-        assertEquals(true, bag.equals(bag2));
+        assertEquals(bag, bag2);
     }
 
     @SuppressWarnings("unchecked")
@@ -684,7 +685,7 @@ public abstract class AbstractBagTest<T> extends AbstractCollectionTest<T> {
         final Bag<T> bag = makeObject();
         if (bag instanceof Serializable && !skipSerializedCanonicalTests() && isTestSerialization()) {
             final Bag<?> bag2 = (Bag<?>) readExternalFormFromDisk(getCanonicalEmptyCollectionName(bag));
-            assertTrue("Bag is empty", bag2.size() == 0);
+            assertTrue("Bag is empty", bag2.isEmpty());
             assertEquals(bag, bag2);
         }
     }
diff --git a/src/test/java/org/apache/commons/collections4/bag/CollectionBagTest.java b/src/test/java/org/apache/commons/collections4/bag/CollectionBagTest.java
index e1135f6..53baa37 100644
--- a/src/test/java/org/apache/commons/collections4/bag/CollectionBagTest.java
+++ b/src/test/java/org/apache/commons/collections4/bag/CollectionBagTest.java
@@ -96,7 +96,7 @@ public class CollectionBagTest<T> extends AbstractCollectionTest<T> {
         final Bag<T> bag = makeObject();
         if (bag instanceof Serializable && !skipSerializedCanonicalTests() && isTestSerialization()) {
             final Bag<?> bag2 = (Bag<?>) readExternalFormFromDisk(getCanonicalEmptyCollectionName(bag));
-            assertTrue("Bag is empty", bag2.size() == 0);
+            assertTrue("Bag is empty", bag2.isEmpty());
             assertEquals(bag, bag2);
         }
     }
diff --git a/src/test/java/org/apache/commons/collections4/bag/CollectionSortedBagTest.java b/src/test/java/org/apache/commons/collections4/bag/CollectionSortedBagTest.java
index 4c21dbc..1cb9f6c 100644
--- a/src/test/java/org/apache/commons/collections4/bag/CollectionSortedBagTest.java
+++ b/src/test/java/org/apache/commons/collections4/bag/CollectionSortedBagTest.java
@@ -136,7 +136,7 @@ public class CollectionSortedBagTest<T> extends AbstractCollectionTest<T> {
         final Bag<T> bag = makeObject();
         if (bag instanceof Serializable && !skipSerializedCanonicalTests() && isTestSerialization()) {
             final Bag<?> bag2 = (Bag<?>) readExternalFormFromDisk(getCanonicalEmptyCollectionName(bag));
-            assertTrue("Bag is empty", bag2.size() == 0);
+            assertEquals("Bag is empty", 0, bag2.size());
             assertEquals(bag, bag2);
         }
     }
diff --git a/src/test/java/org/apache/commons/collections4/bag/PredicatedBagTest.java b/src/test/java/org/apache/commons/collections4/bag/PredicatedBagTest.java
index 4a1f3a9..0aed058 100644
--- a/src/test/java/org/apache/commons/collections4/bag/PredicatedBagTest.java
+++ b/src/test/java/org/apache/commons/collections4/bag/PredicatedBagTest.java
@@ -72,28 +72,26 @@ public class PredicatedBagTest<T> extends AbstractBagTest<T> {
         for (int i = 0; i < els.length; i++) {
             bag.add(els[i]);
             assertEquals(i + 1, bag.size());
-            assertEquals(true, bag.contains(els[i]));
+            assertTrue(bag.contains(els[i]));
         }
-        Set<T> set = ((PredicatedBag<T>) bag).uniqueSet();
+        Set<T> set = bag.uniqueSet();
         assertTrue("Unique set contains the first element", set.contains(els[0]));
-        assertEquals(true, bag.remove(els[0]));
-        set = ((PredicatedBag<T>) bag).uniqueSet();
-        assertTrue("Unique set now does not contain the first element",
-            !set.contains(els[0]));
+        assertTrue(bag.remove(els[0]));
+        set = bag.uniqueSet();
+        assertFalse("Unique set now does not contain the first element", set.contains(els[0]));
     }
 
     @SuppressWarnings("unchecked")
     public void testIllegalAdd() {
         final Bag<T> bag = makeTestBag();
-        final Integer i = Integer.valueOf(3);
+        final Integer i = 3;
         try {
             bag.add((T) i);
             fail("Integer should fail string predicate.");
         } catch (final IllegalArgumentException e) {
             // expected
         }
-        assertTrue("Collection shouldn't contain illegal element",
-            !bag.contains(i));
+        assertFalse("Collection shouldn't contain illegal element", bag.contains(i));
     }
 
     @SuppressWarnings("unchecked")
@@ -101,7 +99,7 @@ public class PredicatedBagTest<T> extends AbstractBagTest<T> {
         final HashBag<Object> elements = new HashBag<>();
         elements.add("one");
         elements.add("two");
-        elements.add(Integer.valueOf(3));
+        elements.add(3);
         elements.add("four");
         try {
             decorateBag((HashBag<T>) elements, stringPredicate());
diff --git a/src/test/java/org/apache/commons/collections4/bag/PredicatedSortedBagTest.java b/src/test/java/org/apache/commons/collections4/bag/PredicatedSortedBagTest.java
index 4989189..ae1e160 100644
--- a/src/test/java/org/apache/commons/collections4/bag/PredicatedSortedBagTest.java
+++ b/src/test/java/org/apache/commons/collections4/bag/PredicatedSortedBagTest.java
@@ -91,7 +91,7 @@ public class PredicatedSortedBagTest<T> extends AbstractSortedBagTest<T> {
         assertEquals("first element", bag.first(), one);
         assertEquals("last element", bag.last(), two);
         final Comparator<? super T> c = bag.comparator();
-        assertTrue("natural order, so comparator should be null", c == null);
+        assertNull("natural order, so comparator should be null", c);
     }
 
     @Override
diff --git a/src/test/java/org/apache/commons/collections4/bag/TransformedBagTest.java b/src/test/java/org/apache/commons/collections4/bag/TransformedBagTest.java
index adafe88..36a6eb9 100644
--- a/src/test/java/org/apache/commons/collections4/bag/TransformedBagTest.java
+++ b/src/test/java/org/apache/commons/collections4/bag/TransformedBagTest.java
@@ -53,17 +53,17 @@ public class TransformedBagTest<T> extends AbstractBagTest<T> {
         //T had better be Object!
         final Bag<T> bag = TransformedBag.transformingBag(new HashBag<T>(),
                 (Transformer<T, T>) TransformedCollectionTest.STRING_TO_INTEGER_TRANSFORMER);
-        assertEquals(0, bag.size());
+        assertTrue(bag.isEmpty());
         final Object[] els = new Object[] {"1", "3", "5", "7", "2", "4", "6"};
         for (int i = 0; i < els.length; i++) {
             bag.add((T) els[i]);
             assertEquals(i + 1, bag.size());
-            assertEquals(true, bag.contains(Integer.valueOf((String) els[i])));
-            assertEquals(false, bag.contains(els[i]));
+            assertTrue(bag.contains(Integer.valueOf((String) els[i])));
+            assertFalse(bag.contains(els[i]));
         }
 
-        assertEquals(false, bag.remove(els[0]));
-        assertEquals(true, bag.remove(Integer.valueOf((String) els[0])));
+        assertFalse(bag.remove(els[0]));
+        assertTrue(bag.remove(Integer.valueOf((String) els[0])));
     }
 
     @SuppressWarnings("unchecked")
@@ -77,12 +77,12 @@ public class TransformedBagTest<T> extends AbstractBagTest<T> {
                 (Transformer<T, T>) TransformedCollectionTest.STRING_TO_INTEGER_TRANSFORMER);
         assertEquals(els.length, bag.size());
         for (final Object el : els) {
-            assertEquals(true, bag.contains(Integer.valueOf((String) el)));
-            assertEquals(false, bag.contains(el));
+            assertTrue(bag.contains(Integer.valueOf((String) el)));
+            assertFalse(bag.contains(el));
         }
 
-        assertEquals(false, bag.remove(els[0]));
-        assertEquals(true, bag.remove(Integer.valueOf((String) els[0])));
+        assertFalse(bag.remove(els[0]));
+        assertTrue(bag.remove(Integer.valueOf((String) els[0])));
     }
 
     @Override
diff --git a/src/test/java/org/apache/commons/collections4/bag/TransformedSortedBagTest.java b/src/test/java/org/apache/commons/collections4/bag/TransformedSortedBagTest.java
index 65c1426..1d8d2ec 100644
--- a/src/test/java/org/apache/commons/collections4/bag/TransformedSortedBagTest.java
+++ b/src/test/java/org/apache/commons/collections4/bag/TransformedSortedBagTest.java
@@ -55,10 +55,10 @@ public class TransformedSortedBagTest<T> extends AbstractSortedBagTest<T> {
         for (int i = 0; i < els.length; i++) {
             bag.add((T) els[i]);
             assertEquals(i + 1, bag.size());
-            assertEquals(true, bag.contains(Integer.valueOf((String) els[i])));
+            assertTrue(bag.contains(Integer.valueOf((String) els[i])));
         }
 
-        assertEquals(true, bag.remove(Integer.valueOf((String) els[0])));
+        assertTrue(bag.remove(Integer.valueOf((String) els[0])));
 
     }
 
@@ -71,10 +71,10 @@ public class TransformedSortedBagTest<T> extends AbstractSortedBagTest<T> {
         final SortedBag<T> bag = TransformedSortedBag.transformedSortedBag(originalBag, (Transformer<T, T>) TransformedCollectionTest.STRING_TO_INTEGER_TRANSFORMER);
         assertEquals(els.length, bag.size());
         for (final Object el : els) {
-            assertEquals(true, bag.contains(Integer.valueOf((String) el)));
+            assertTrue(bag.contains(Integer.valueOf((String) el)));
         }
 
-        assertEquals(true, bag.remove(Integer.valueOf((String) els[0])));
+        assertTrue(bag.remove(Integer.valueOf((String) els[0])));
     }
 
     @Override
diff --git a/src/test/java/org/apache/commons/collections4/bidimap/AbstractBidiMapTest.java b/src/test/java/org/apache/commons/collections4/bidimap/AbstractBidiMapTest.java
index 5d9a001..2e50270 100644
--- a/src/test/java/org/apache/commons/collections4/bidimap/AbstractBidiMapTest.java
+++ b/src/test/java/org/apache/commons/collections4/bidimap/AbstractBidiMapTest.java
@@ -132,10 +132,10 @@ public abstract class AbstractBidiMapTest<K, V> extends AbstractIterableMapTest<
         final Set<V> keys2 = map2.keySet();
         final Collection<V> values1 = map1.values();
         final Collection<K> values2 = map2.values();
-        assertEquals(true, keys1.containsAll(values2));
-        assertEquals(true, values2.containsAll(keys1));
-        assertEquals(true, values1.containsAll(keys2));
-        assertEquals(true, keys2.containsAll(values1));
+        assertTrue(keys1.containsAll(values2));
+        assertTrue(values2.containsAll(keys1));
+        assertTrue(values1.containsAll(keys2));
+        assertTrue(keys2.containsAll(values1));
     }
 
     // testGetKey
@@ -254,18 +254,18 @@ public abstract class AbstractBidiMapTest<K, V> extends AbstractIterableMapTest<
         removeValue(makeFullMap(), getSampleValues()[0]);
         removeValue(makeFullMap().inverseBidiMap(), getSampleKeys()[0]);
 
-        assertEquals(null, makeFullMap().removeValue("NotPresent"));
+        assertNull(makeFullMap().removeValue("NotPresent"));
     }
 
     private void remove(final BidiMap<?, ?> map, final Object key) {
         final Object value = map.remove(key);
-        assertTrue("Key was not removed.", !map.containsKey(key));
+        assertFalse("Key was not removed.", map.containsKey(key));
         assertNull("Value was not removed.", map.getKey(value));
     }
 
     private void removeValue(final BidiMap<?, ?> map, final Object value) {
         final Object key = map.removeValue(value);
-        assertTrue("Key was not removed.", !map.containsKey(key));
+        assertFalse("Key was not removed.", map.containsKey(key));
         assertNull("Value was not removed.", map.getKey(value));
     }
 
@@ -274,13 +274,13 @@ public abstract class AbstractBidiMapTest<K, V> extends AbstractIterableMapTest<
         resetFull();
         final Iterator<K> keys = map.keySet().iterator();
         final Iterator<V> values = map.values().iterator();
-        for (; keys.hasNext() && values.hasNext();) {
+        while (keys.hasNext() && values.hasNext()) {
             final K key = keys.next();
             final V value = values.next();
             assertSame(map.get(key), value);
         }
-        assertEquals(false, keys.hasNext());
-        assertEquals(false, values.hasNext());
+        assertFalse(keys.hasNext());
+        assertFalse(values.hasNext());
     }
 
     //-----------------------------------------------------------------------
@@ -296,15 +296,11 @@ public abstract class AbstractBidiMapTest<K, V> extends AbstractIterableMapTest<
     private void removeByKeySet(final BidiMap<?, ?> map, final Object key, final Object value) {
         map.keySet().remove(key);
 
-        assertTrue("Key was not removed.", !map.containsKey(key));
-        assertTrue("Value was not removed.", !map.containsValue(value));
+        assertFalse("Key was not removed.", map.containsKey(key));
+        assertFalse("Value was not removed.", map.containsValue(value));
 
-        assertTrue(
-            "Key was not removed from inverse map.",
-            !map.inverseBidiMap().containsValue(key));
-        assertTrue(
-            "Value was not removed from inverse map.",
-            !map.inverseBidiMap().containsKey(value));
+        assertFalse("Key was not removed from inverse map.", map.inverseBidiMap().containsValue(key));
+        assertFalse("Value was not removed from inverse map.", map.inverseBidiMap().containsKey(value));
     }
 
     //-----------------------------------------------------------------------
@@ -322,15 +318,11 @@ public abstract class AbstractBidiMapTest<K, V> extends AbstractIterableMapTest<
         temp.put(key, value);
         map.entrySet().remove(temp.entrySet().iterator().next());
 
-        assertTrue("Key was not removed.", !map.containsKey(key));
-        assertTrue("Value was not removed.", !map.containsValue(value));
+        assertFalse("Key was not removed.", map.containsKey(key));
+        assertFalse("Value was not removed.", map.containsValue(value));
 
-        assertTrue(
-            "Key was not removed from inverse map.",
-            !map.inverseBidiMap().containsValue(key));
-        assertTrue(
-            "Value was not removed from inverse map.",
-            !map.inverseBidiMap().containsKey(value));
+        assertFalse("Key was not removed from inverse map.", map.inverseBidiMap().containsValue(key));
+        assertFalse("Value was not removed from inverse map.", map.inverseBidiMap().containsKey(value));
     }
 
     /**
@@ -394,11 +386,11 @@ public abstract class AbstractBidiMapTest<K, V> extends AbstractIterableMapTest<
             entryConfirmed2.setValue(newValue1);
             AbstractBidiMapTest.this.getConfirmed().remove(key1);
             assertEquals(newValue1, entry2.getValue());
-            assertEquals(true, AbstractBidiMapTest.this.getMap().containsKey(entry2.getKey()));
-            assertEquals(true, AbstractBidiMapTest.this.getMap().containsValue(newValue1));
+            assertTrue(AbstractBidiMapTest.this.getMap().containsKey(entry2.getKey()));
+            assertTrue(AbstractBidiMapTest.this.getMap().containsValue(newValue1));
             assertEquals(newValue1, AbstractBidiMapTest.this.getMap().get(entry2.getKey()));
-            assertEquals(false, AbstractBidiMapTest.this.getMap().containsKey(key1));
-            assertEquals(false, AbstractBidiMapTest.this.getMap().containsValue(newValue2));
+            assertFalse(AbstractBidiMapTest.this.getMap().containsKey(key1));
+            assertFalse(AbstractBidiMapTest.this.getMap().containsValue(newValue2));
             TestBidiMapEntrySet.this.verify();
 
             // check for ConcurrentModification
@@ -541,7 +533,7 @@ public abstract class AbstractBidiMapTest<K, V> extends AbstractIterableMapTest<
         resetFull();
         final BidiMap<K, V> bidi = getMap();
         final MapIterator<K, V> it = bidi.mapIterator();
-        assertEquals(true, it.hasNext());
+        assertTrue(it.hasNext());
         final K key1 = it.next();
 
         if (!isSetValueSupported()) {
@@ -557,8 +549,8 @@ public abstract class AbstractBidiMapTest<K, V> extends AbstractIterableMapTest<
         confirmed.put(key1, newValue1);
         assertSame(key1, it.getKey());
         assertSame(newValue1, it.getValue());
-        assertEquals(true, bidi.containsKey(key1));
-        assertEquals(true, bidi.containsValue(newValue1));
+        assertTrue(bidi.containsKey(key1));
+        assertTrue(bidi.containsValue(newValue1));
         assertEquals(newValue1, bidi.get(key1));
         verify();
 
@@ -566,8 +558,8 @@ public abstract class AbstractBidiMapTest<K, V> extends AbstractIterableMapTest<
         confirmed.put(key1, newValue1);
         assertSame(key1, it.getKey());
         assertSame(newValue1, it.getValue());
-        assertEquals(true, bidi.containsKey(key1));
-        assertEquals(true, bidi.containsValue(newValue1));
+        assertTrue(bidi.containsKey(key1));
+        assertTrue(bidi.containsValue(newValue1));
         assertEquals(newValue1, bidi.get(key1));
         verify();
 
@@ -576,8 +568,8 @@ public abstract class AbstractBidiMapTest<K, V> extends AbstractIterableMapTest<
         confirmed.put(key2, newValue2);
         assertSame(key2, it.getKey());
         assertSame(newValue2, it.getValue());
-        assertEquals(true, bidi.containsKey(key2));
-        assertEquals(true, bidi.containsValue(newValue2));
+        assertTrue(bidi.containsKey(key2));
+        assertTrue(bidi.containsValue(newValue2));
         assertEquals(newValue2, bidi.get(key2));
         verify();
 
@@ -592,11 +584,11 @@ public abstract class AbstractBidiMapTest<K, V> extends AbstractIterableMapTest<
         confirmed.put(key2, newValue1);
         AbstractBidiMapTest.this.getConfirmed().remove(key1);
         assertEquals(newValue1, it.getValue());
-        assertEquals(true, bidi.containsKey(it.getKey()));
-        assertEquals(true, bidi.containsValue(newValue1));
+        assertTrue(bidi.containsKey(it.getKey()));
+        assertTrue(bidi.containsValue(newValue1));
         assertEquals(newValue1, bidi.get(it.getKey()));
-        assertEquals(false, bidi.containsKey(key1));
-        assertEquals(false, bidi.containsValue(newValue2));
+        assertFalse(bidi.containsKey(key1));
+        assertFalse(bidi.containsValue(newValue2));
         verify();
 
         // check for ConcurrentModification
diff --git a/src/test/java/org/apache/commons/collections4/bidimap/AbstractSortedBidiMapTest.java b/src/test/java/org/apache/commons/collections4/bidimap/AbstractSortedBidiMapTest.java
index 1fa7153..6a9a619 100644
--- a/src/test/java/org/apache/commons/collections4/bidimap/AbstractSortedBidiMapTest.java
+++ b/src/test/java/org/apache/commons/collections4/bidimap/AbstractSortedBidiMapTest.java
@@ -53,7 +53,7 @@ public abstract class AbstractSortedBidiMapTest<K extends Comparable<K>, V exten
         sortedValues.addAll(map.values());
         sortedValues = Collections.unmodifiableList(sortedValues);
 
-        sortedNewValues.addAll(this.<V>getAsList(getNewSampleValues()));
+        sortedNewValues.addAll(getAsList(getNewSampleValues()));
     }
 
 //    public AbstractTestSortedBidiMap() {
@@ -116,14 +116,14 @@ public abstract class AbstractSortedBidiMapTest<K extends Comparable<K>, V exten
 
         final SortedMap<K, V> head = sm.headMap(toKey);
         assertEquals(1, head.size());
-        assertEquals(true, sm.containsKey(first));
-        assertEquals(true, head.containsKey(first));
-        assertEquals(true, sm.containsValue(firstValue));
-        assertEquals(true, head.containsValue(firstValue));
-        assertEquals(true, sm.containsKey(second));
-        assertEquals(false, head.containsKey(second));
-        assertEquals(true, sm.containsValue(secondValue));
-        assertEquals(false, head.containsValue(secondValue));
+        assertTrue(sm.containsKey(first));
+        assertTrue(head.containsKey(first));
+        assertTrue(sm.containsValue(firstValue));
+        assertTrue(head.containsValue(firstValue));
+        assertTrue(sm.containsKey(second));
+        assertFalse(head.containsKey(second));
+        assertTrue(sm.containsValue(secondValue));
+        assertFalse(head.containsValue(secondValue));
     }
 
     //-----------------------------------------------------------------------
@@ -151,26 +151,26 @@ public abstract class AbstractSortedBidiMapTest<K extends Comparable<K>, V exten
         assertEquals(size - 2, sm.size());
         assertEquals(size - 2, sm.inverseBidiMap().size());
 
-        assertEquals(false, sm.containsKey(first));
-        assertEquals(false, sm.containsValue(firstValue));
-        assertEquals(false, sm.inverseBidiMap().containsKey(firstValue));
-        assertEquals(false, sm.inverseBidiMap().containsValue(first));
-        assertEquals(false, sub.containsKey(first));
-        assertEquals(false, sub.containsValue(firstValue));
-
-        assertEquals(false, sm.containsKey(second));
-        assertEquals(false, sm.containsValue(secondValue));
-        assertEquals(false, sm.inverseBidiMap().containsKey(secondValue));
-        assertEquals(false, sm.inverseBidiMap().containsValue(second));
-        assertEquals(false, sub.containsKey(second));
-        assertEquals(false, sub.containsValue(secondValue));
-
-        assertEquals(true, sm.containsKey(toKey));
-        assertEquals(true, sm.containsValue(toKeyValue));
-        assertEquals(true, sm.inverseBidiMap().containsKey(toKeyValue));
-        assertEquals(true, sm.inverseBidiMap().containsValue(toKey));
-        assertEquals(false, sub.containsKey(toKey));
-        assertEquals(false, sub.containsValue(toKeyValue));
+        assertFalse(sm.containsKey(first));
+        assertFalse(sm.containsValue(firstValue));
+        assertFalse(sm.inverseBidiMap().containsKey(firstValue));
+        assertFalse(sm.inverseBidiMap().containsValue(first));
+        assertFalse(sub.containsKey(first));
+        assertFalse(sub.containsValue(firstValue));
+
+        assertFalse(sm.containsKey(second));
+        assertFalse(sm.containsValue(secondValue));
+        assertFalse(sm.inverseBidiMap().containsKey(secondValue));
+        assertFalse(sm.inverseBidiMap().containsValue(second));
+        assertFalse(sub.containsKey(second));
+        assertFalse(sub.containsValue(secondValue));
+
+        assertTrue(sm.containsKey(toKey));
+        assertTrue(sm.containsValue(toKeyValue));
+        assertTrue(sm.inverseBidiMap().containsKey(toKeyValue));
+        assertTrue(sm.inverseBidiMap().containsValue(toKey));
+        assertFalse(sub.containsKey(toKey));
+        assertFalse(sub.containsValue(toKeyValue));
     }
 
     //-----------------------------------------------------------------------
@@ -189,32 +189,32 @@ public abstract class AbstractSortedBidiMapTest<K extends Comparable<K>, V exten
         final int size = sm.size();
         final SortedMap<K, V> sub = sm.headMap(toKey);
         assertEquals(2, sub.size());
-        assertEquals(true, sm.containsKey(first));
-        assertEquals(true, sub.containsKey(first));
-        assertEquals(true, sm.containsKey(second));
-        assertEquals(true, sub.containsKey(second));
+        assertTrue(sm.containsKey(first));
+        assertTrue(sub.containsKey(first));
+        assertTrue(sm.containsKey(second));
+        assertTrue(sub.containsKey(second));
 
         final V firstValue = sub.remove(first);
         assertEquals(1, sub.size());
         assertEquals(size - 1, sm.size());
         assertEquals(size - 1, sm.inverseBidiMap().size());
-        assertEquals(false, sm.containsKey(first));
-        assertEquals(false, sm.containsValue(firstValue));
-        assertEquals(false, sm.inverseBidiMap().containsKey(firstValue));
-        assertEquals(false, sm.inverseBidiMap().containsValue(first));
-        assertEquals(false, sub.containsKey(first));
-        assertEquals(false, sub.containsValue(firstValue));
+        assertFalse(sm.containsKey(first));
+        assertFalse(sm.containsValue(firstValue));
+        assertFalse(sm.inverseBidiMap().containsKey(firstValue));
+        assertFalse(sm.inverseBidiMap().containsValue(first));
+        assertFalse(sub.containsKey(first));
+        assertFalse(sub.containsValue(firstValue));
 
         final V secondValue = sub.remove(second);
         assertEquals(0, sub.size());
         assertEquals(size - 2, sm.size());
         assertEquals(size - 2, sm.inverseBidiMap().size());
-        assertEquals(false, sm.containsKey(second));
-        assertEquals(false, sm.containsValue(secondValue));
-        assertEquals(false, sm.inverseBidiMap().containsKey(secondValue));
-        assertEquals(false, sm.inverseBidiMap().containsValue(second));
-        assertEquals(false, sub.containsKey(second));
-        assertEquals(false, sub.containsValue(secondValue));
+        assertFalse(sm.containsKey(second));
+        assertFalse(sm.containsValue(secondValue));
+        assertFalse(sm.inverseBidiMap().containsKey(secondValue));
+        assertFalse(sm.inverseBidiMap().containsValue(second));
+        assertFalse(sub.containsKey(second));
+        assertFalse(sub.containsValue(secondValue));
     }
 
     //-----------------------------------------------------------------------
@@ -239,36 +239,36 @@ public abstract class AbstractSortedBidiMapTest<K extends Comparable<K>, V exten
         final Iterator<Map.Entry<K, V>> it2 = set.iterator();
         final Map.Entry<K, V> firstEntry = cloneMapEntry(it2.next());
         final Map.Entry<K, V> secondEntry = cloneMapEntry(it2.next());
-        assertEquals(true, sm.containsKey(first));
-        assertEquals(true, sub.containsKey(first));
-        assertEquals(true, set.contains(firstEntry));
-        assertEquals(true, sm.containsKey(second));
-        assertEquals(true, sub.containsKey(second));
-        assertEquals(true, set.contains(secondEntry));
+        assertTrue(sm.containsKey(first));
+        assertTrue(sub.containsKey(first));
+        assertTrue(set.contains(firstEntry));
+        assertTrue(sm.containsKey(second));
+        assertTrue(sub.containsKey(second));
+        assertTrue(set.contains(secondEntry));
 
         set.remove(firstEntry);
         assertEquals(1, sub.size());
         assertEquals(size - 1, sm.size());
         assertEquals(size - 1, sm.inverseBidiMap().size());
-        assertEquals(false, sm.containsKey(firstEntry.getKey()));
-        assertEquals(false, sm.containsValue(firstEntry.getValue()));
-        assertEquals(false, sm.inverseBidiMap().containsKey(firstEntry.getValue()));
-        assertEquals(false, sm.inverseBidiMap().containsValue(firstEntry.getKey()));
-        assertEquals(false, sub.containsKey(firstEntry.getKey()));
-        assertEquals(false, sub.containsValue(firstEntry.getValue()));
-        assertEquals(false, set.contains(firstEntry));
+        assertFalse(sm.containsKey(firstEntry.getKey()));
+        assertFalse(sm.containsValue(firstEntry.getValue()));
+        assertFalse(sm.inverseBidiMap().containsKey(firstEntry.getValue()));
+        assertFalse(sm.inverseBidiMap().containsValue(firstEntry.getKey()));
+        assertFalse(sub.containsKey(firstEntry.getKey()));
+        assertFalse(sub.containsValue(firstEntry.getValue()));
+        assertFalse(set.contains(firstEntry));
 
         set.remove(secondEntry);
         assertEquals(0, sub.size());
         assertEquals(size - 2, sm.size());
         assertEquals(size - 2, sm.inverseBidiMap().size());
-        assertEquals(false, sm.containsKey(secondEntry.getKey()));
-        assertEquals(false, sm.containsValue(secondEntry.getValue()));
-        assertEquals(false, sm.inverseBidiMap().containsKey(secondEntry.getValue()));
-        assertEquals(false, sm.inverseBidiMap().containsValue(secondEntry.getKey()));
-        assertEquals(false, sub.containsKey(secondEntry.getKey()));
-        assertEquals(false, sub.containsValue(secondEntry.getValue()));
-        assertEquals(false, set.contains(secondEntry));
+        assertFalse(sm.containsKey(secondEntry.getKey()));
+        assertFalse(sm.containsValue(secondEntry.getValue()));
+        assertFalse(sm.inverseBidiMap().containsKey(secondEntry.getValue()));
+        assertFalse(sm.inverseBidiMap().containsValue(secondEntry.getKey()));
+        assertFalse(sub.containsKey(secondEntry.getKey()));
+        assertFalse(sub.containsValue(secondEntry.getValue()));
+        assertFalse(set.contains(secondEntry));
     }
 
     //-----------------------------------------------------------------------
@@ -286,18 +286,18 @@ public abstract class AbstractSortedBidiMapTest<K extends Comparable<K>, V exten
 
         final SortedMap<K, V> sub = sm.tailMap(fromKey);
         assertEquals(sm.size() - 1, sub.size());
-        assertEquals(true, sm.containsKey(first));
-        assertEquals(false, sub.containsKey(first));
-        assertEquals(true, sm.containsValue(firstValue));
-        assertEquals(false, sub.containsValue(firstValue));
-        assertEquals(true, sm.containsKey(fromKey));
-        assertEquals(true, sub.containsKey(fromKey));
-        assertEquals(true, sm.containsValue(fromKeyValue));
-        assertEquals(true, sub.containsValue(fromKeyValue));
-        assertEquals(true, sm.containsKey(second));
-        assertEquals(true, sub.containsKey(second));
-        assertEquals(true, sm.containsValue(secondValue));
-        assertEquals(true, sub.containsValue(secondValue));
+        assertTrue(sm.containsKey(first));
+        assertFalse(sub.containsKey(first));
+        assertTrue(sm.containsValue(firstValue));
+        assertFalse(sub.containsValue(firstValue));
+        assertTrue(sm.containsKey(fromKey));
+        assertTrue(sub.containsKey(fromKey));
+        assertTrue(sm.containsValue(fromKeyValue));
+        assertTrue(sub.containsValue(fromKeyValue));
+        assertTrue(sm.containsKey(second));
+        assertTrue(sub.containsKey(second));
+        assertTrue(sm.containsValue(secondValue));
+        assertTrue(sub.containsValue(secondValue));
     }
 
     //-----------------------------------------------------------------------
@@ -327,26 +327,26 @@ public abstract class AbstractSortedBidiMapTest<K extends Comparable<K>, V exten
         assertEquals(3, sm.size());
         assertEquals(3, sm.inverseBidiMap().size());
 
-        assertEquals(true, sm.containsKey(first));
-        assertEquals(true, sm.containsValue(firstValue));
-        assertEquals(true, sm.inverseBidiMap().containsKey(firstValue));
-        assertEquals(true, sm.inverseBidiMap().containsValue(first));
-        assertEquals(false, sub.containsKey(first));
-        assertEquals(false, sub.containsValue(firstValue));
-
-        assertEquals(false, sm.containsKey(fromKey));
-        assertEquals(false, sm.containsValue(fromKeyValue));
-        assertEquals(false, sm.inverseBidiMap().containsKey(fromKeyValue));
-        assertEquals(false, sm.inverseBidiMap().containsValue(fromKey));
-        assertEquals(false, sub.containsKey(fromKey));
-        assertEquals(false, sub.containsValue(fromKeyValue));
-
-        assertEquals(false, sm.containsKey(second));
-        assertEquals(false, sm.containsValue(secondValue));
-        assertEquals(false, sm.inverseBidiMap().containsKey(secondValue));
-        assertEquals(false, sm.inverseBidiMap().containsValue(second));
-        assertEquals(false, sub.containsKey(second));
-        assertEquals(false, sub.containsValue(secondValue));
+        assertTrue(sm.containsKey(first));
+        assertTrue(sm.containsValue(firstValue));
+        assertTrue(sm.inverseBidiMap().containsKey(firstValue));
+        assertTrue(sm.inverseBidiMap().containsValue(first));
+        assertFalse(sub.containsKey(first));
+        assertFalse(sub.containsValue(firstValue));
+
+        assertFalse(sm.containsKey(fromKey));
+        assertFalse(sm.containsValue(fromKeyValue));
+        assertFalse(sm.inverseBidiMap().containsKey(fromKeyValue));
+        assertFalse(sm.inverseBidiMap().containsValue(fromKey));
+        assertFalse(sub.containsKey(fromKey));
+        assertFalse(sub.containsValue(fromKeyValue));
+
+        assertFalse(sm.containsKey(second));
+        assertFalse(sm.containsValue(secondValue));
+        assertFalse(sm.inverseBidiMap().containsKey(secondValue));
+        assertFalse(sm.inverseBidiMap().containsValue(second));
+        assertFalse(sub.containsKey(second));
+        assertFalse(sub.containsValue(secondValue));
     }
 
     //-----------------------------------------------------------------------
@@ -366,32 +366,32 @@ public abstract class AbstractSortedBidiMapTest<K extends Comparable<K>, V exten
 
         final int size = sm.size();
         final SortedMap<K, V> sub = sm.tailMap(fromKey);
-        assertEquals(true, sm.containsKey(first));
-        assertEquals(true, sub.containsKey(first));
-        assertEquals(true, sm.containsKey(second));
-        assertEquals(true, sub.containsKey(second));
+        assertTrue(sm.containsKey(first));
+        assertTrue(sub.containsKey(first));
+        assertTrue(sm.containsKey(second));
+        assertTrue(sub.containsKey(second));
 
         final Object firstValue = sub.remove(first);
         assertEquals(size - 3, sub.size());
         assertEquals(size - 1, sm.size());
         assertEquals(size - 1, sm.inverseBidiMap().size());
-        assertEquals(false, sm.containsKey(first));
-        assertEquals(false, sm.containsValue(firstValue));
-        assertEquals(false, sm.inverseBidiMap().containsKey(firstValue));
-        assertEquals(false, sm.inverseBidiMap().containsValue(first));
-        assertEquals(false, sub.containsKey(first));
-        assertEquals(false, sub.containsValue(firstValue));
+        assertFalse(sm.containsKey(first));
+        assertFalse(sm.containsValue(firstValue));
+        assertFalse(sm.inverseBidiMap().containsKey(firstValue));
+        assertFalse(sm.inverseBidiMap().containsValue(first));
+        assertFalse(sub.containsKey(first));
+        assertFalse(sub.containsValue(firstValue));
 
         final Object secondValue = sub.remove(second);
         assertEquals(size - 4, sub.size());
         assertEquals(size - 2, sm.size());
         assertEquals(size - 2, sm.inverseBidiMap().size());
-        assertEquals(false, sm.containsKey(second));
-        assertEquals(false, sm.containsValue(secondValue));
-        assertEquals(false, sm.inverseBidiMap().containsKey(secondValue));
-        assertEquals(false, sm.inverseBidiMap().containsValue(second));
-        assertEquals(false, sub.containsKey(second));
-        assertEquals(false, sub.containsValue(secondValue));
+        assertFalse(sm.containsKey(second));
+        assertFalse(sm.containsValue(secondValue));
+        assertFalse(sm.inverseBidiMap().containsKey(secondValue));
+        assertFalse(sm.inverseBidiMap().containsValue(second));
+        assertFalse(sub.containsKey(second));
+        assertFalse(sub.containsValue(secondValue));
     }
 
     //-----------------------------------------------------------------------
@@ -416,36 +416,36 @@ public abstract class AbstractSortedBidiMapTest<K extends Comparable<K>, V exten
         it2.next();
         final Map.Entry<K, V> firstEntry = cloneMapEntry(it2.next());
         final Map.Entry<K, V> secondEntry = cloneMapEntry(it2.next());
-        assertEquals(true, sm.containsKey(first));
-        assertEquals(true, sub.containsKey(first));
-        assertEquals(true, set.contains(firstEntry));
-        assertEquals(true, sm.containsKey(second));
-        assertEquals(true, sub.containsKey(second));
-        assertEquals(true, set.contains(secondEntry));
+        assertTrue(sm.containsKey(first));
+        assertTrue(sub.containsKey(first));
+        assertTrue(set.contains(firstEntry));
+        assertTrue(sm.containsKey(second));
+        assertTrue(sub.containsKey(second));
+        assertTrue(set.contains(secondEntry));
 
         set.remove(firstEntry);
         assertEquals(size - 3, sub.size());
         assertEquals(size - 1, sm.size());
         assertEquals(size - 1, sm.inverseBidiMap().size());
-        assertEquals(false, sm.containsKey(firstEntry.getKey()));
-        assertEquals(false, sm.containsValue(firstEntry.getValue()));
-        assertEquals(false, sm.inverseBidiMap().containsKey(firstEntry.getValue()));
-        assertEquals(false, sm.inverseBidiMap().containsValue(firstEntry.getKey()));
-        assertEquals(false, sub.containsKey(firstEntry.getKey()));
-        assertEquals(false, sub.containsValue(firstEntry.getValue()));
-        assertEquals(false, set.contains(firstEntry));
+        assertFalse(sm.containsKey(firstEntry.getKey()));
+        assertFalse(sm.containsValue(firstEntry.getValue()));
+        assertFalse(sm.inverseBidiMap().containsKey(firstEntry.getValue()));
+        assertFalse(sm.inverseBidiMap().containsValue(firstEntry.getKey()));
+        assertFalse(sub.containsKey(firstEntry.getKey()));
+        assertFalse(sub.containsValue(firstEntry.getValue()));
+        assertFalse(set.contains(firstEntry));
 
         set.remove(secondEntry);
         assertEquals(size - 4, sub.size());
         assertEquals(size - 2, sm.size());
         assertEquals(size - 2, sm.inverseBidiMap().size());
-        assertEquals(false, sm.containsKey(secondEntry.getKey()));
-        assertEquals(false, sm.containsValue(secondEntry.getValue()));
-        assertEquals(false, sm.inverseBidiMap().containsKey(secondEntry.getValue()));
-        assertEquals(false, sm.inverseBidiMap().containsValue(secondEntry.getKey()));
-        assertEquals(false, sub.containsKey(secondEntry.getKey()));
-        assertEquals(false, sub.containsValue(secondEntry.getValue()));
-        assertEquals(false, set.contains(secondEntry));
+        assertFalse(sm.containsKey(secondEntry.getKey()));
+        assertFalse(sm.containsValue(secondEntry.getValue()));
+        assertFalse(sm.inverseBidiMap().containsKey(secondEntry.getValue()));
+        assertFalse(sm.inverseBidiMap().containsValue(secondEntry.getKey()));
+        assertFalse(sub.containsKey(secondEntry.getKey()));
+        assertFalse(sub.containsValue(secondEntry.getValue()));
+        assertFalse(set.contains(secondEntry));
     }
 
     //-----------------------------------------------------------------------
@@ -466,22 +466,22 @@ public abstract class AbstractSortedBidiMapTest<K extends Comparable<K>, V exten
 
         final SortedMap<K, V> sub = sm.subMap(fromKey, toKey);
         assertEquals(2, sub.size());
-        assertEquals(true, sm.containsKey(first));
-        assertEquals(false, sub.containsKey(first));
-        assertEquals(true, sm.containsValue(firstValue));
-        assertEquals(false, sub.containsValue(firstValue));
-        assertEquals(true, sm.containsKey(fromKey));
-        assertEquals(true, sub.containsKey(fromKey));
-        assertEquals(true, sm.containsValue(fromKeyValue));
-        assertEquals(true, sub.containsValue(fromKeyValue));
-        assertEquals(true, sm.containsKey(second));
-        assertEquals(true, sub.containsKey(second));
-        assertEquals(true, sm.containsValue(secondValue));
-        assertEquals(true, sub.containsValue(secondValue));
-        assertEquals(true, sm.containsKey(third));
-        assertEquals(false, sub.containsKey(third));
-        assertEquals(true, sm.containsValue(thirdValue));
-        assertEquals(false, sub.containsValue(thirdValue));
+        assertTrue(sm.containsKey(first));
+        assertFalse(sub.containsKey(first));
+        assertTrue(sm.containsValue(firstValue));
+        assertFalse(sub.containsValue(firstValue));
+        assertTrue(sm.containsKey(fromKey));
+        assertTrue(sub.containsKey(fromKey));
+        assertTrue(sm.containsValue(fromKeyValue));
+        assertTrue(sub.containsValue(fromKeyValue));
+        assertTrue(sm.containsKey(second));
+        assertTrue(sub.containsKey(second));
+        assertTrue(sm.containsValue(secondValue));
+        assertTrue(sub.containsValue(secondValue));
+        assertTrue(sm.containsKey(third));
+        assertFalse(sub.containsKey(third));
+        assertTrue(sm.containsValue(thirdValue));
+        assertFalse(sub.containsValue(thirdValue));
     }
 
     //-----------------------------------------------------------------------
@@ -512,33 +512,33 @@ public abstract class AbstractSortedBidiMapTest<K extends Comparable<K>, V exten
         assertEquals(size - 3, sm.size());
         assertEquals(size - 3, sm.inverseBidiMap().size());
 
-        assertEquals(false, sm.containsKey(fromKey));
-        assertEquals(false, sm.containsValue(fromKeyValue));
-        assertEquals(false, sm.inverseBidiMap().containsKey(fromKeyValue));
-        assertEquals(false, sm.inverseBidiMap().containsValue(fromKey));
-        assertEquals(false, sub.containsKey(fromKey));
-        assertEquals(false, sub.containsValue(fromKeyValue));
-
-        assertEquals(false, sm.containsKey(first));
-        assertEquals(false, sm.containsValue(firstValue));
-        assertEquals(false, sm.inverseBidiMap().containsKey(firstValue));
-        assertEquals(false, sm.inverseBidiMap().containsValue(first));
-        assertEquals(false, sub.containsKey(first));
-        assertEquals(false, sub.containsValue(firstValue));
-
-        assertEquals(false, sm.containsKey(second));
-        assertEquals(false, sm.containsValue(secondValue));
-        assertEquals(false, sm.inverseBidiMap().containsKey(secondValue));
-        assertEquals(false, sm.inverseBidiMap().containsValue(second));
-        assertEquals(false, sub.containsKey(second));
-        assertEquals(false, sub.containsValue(secondValue));
-
-        assertEquals(true, sm.containsKey(toKey));
-        assertEquals(true, sm.containsValue(toKeyValue));
-        assertEquals(true, sm.inverseBidiMap().containsKey(toKeyValue));
-        assertEquals(true, sm.inverseBidiMap().containsValue(toKey));
-        assertEquals(false, sub.containsKey(toKey));
-        assertEquals(false, sub.containsValue(toKeyValue));
+        assertFalse(sm.containsKey(fromKey));
+        assertFalse(sm.containsValue(fromKeyValue));
+        assertFalse(sm.inverseBidiMap().containsKey(fromKeyValue));
+        assertFalse(sm.inverseBidiMap().containsValue(fromKey));
+        assertFalse(sub.containsKey(fromKey));
+        assertFalse(sub.containsValue(fromKeyValue));
+
+        assertFalse(sm.containsKey(first));
+        assertFalse(sm.containsValue(firstValue));
+        assertFalse(sm.inverseBidiMap().containsKey(firstValue));
+        assertFalse(sm.inverseBidiMap().containsValue(first));
+        assertFalse(sub.containsKey(first));
+        assertFalse(sub.containsValue(firstValue));
+
+        assertFalse(sm.containsKey(second));
+        assertFalse(sm.containsValue(secondValue));
+        assertFalse(sm.inverseBidiMap().containsKey(secondValue));
+        assertFalse(sm.inverseBidiMap().containsValue(second));
+        assertFalse(sub.containsKey(second));
+        assertFalse(sub.containsValue(secondValue));
+
+        assertTrue(sm.containsKey(toKey));
+        assertTrue(sm.containsValue(toKeyValue));
+        assertTrue(sm.inverseBidiMap().containsKey(toKeyValue));
+        assertTrue(sm.inverseBidiMap().containsValue(toKey));
+        assertFalse(sub.containsKey(toKey));
+        assertFalse(sub.containsValue(toKeyValue));
     }
 
     //-----------------------------------------------------------------------
@@ -559,32 +559,32 @@ public abstract class AbstractSortedBidiMapTest<K extends Comparable<K>, V exten
 
         final int size = sm.size();
         final SortedMap<K, V> sub = sm.subMap(fromKey, toKey);
-        assertEquals(true, sm.containsKey(first));
-        assertEquals(true, sub.containsKey(first));
-        assertEquals(true, sm.containsKey(second));
-        assertEquals(true, sub.containsKey(second));
+        assertTrue(sm.containsKey(first));
+        assertTrue(sub.containsKey(first));
+        assertTrue(sm.containsKey(second));
+        assertTrue(sub.containsKey(second));
 
         final V firstValue = sub.remove(first);
         assertEquals(2, sub.size());
         assertEquals(size - 1, sm.size());
         assertEquals(size - 1, sm.inverseBidiMap().size());
-        assertEquals(false, sm.containsKey(first));
-        assertEquals(false, sm.containsValue(firstValue));
-        assertEquals(false, sm.inverseBidiMap().containsKey(firstValue));
-        assertEquals(false, sm.inverseBidiMap().containsValue(first));
-        assertEquals(false, sub.containsKey(first));
-        assertEquals(false, sub.containsValue(firstValue));
+        assertFalse(sm.containsKey(first));
+        assertFalse(sm.containsValue(firstValue));
+        assertFalse(sm.inverseBidiMap().containsKey(firstValue));
+        assertFalse(sm.inverseBidiMap().containsValue(first));
+        assertFalse(sub.containsKey(first));
+        assertFalse(sub.containsValue(firstValue));
 
         final V secondValue = sub.remove(second);
         assertEquals(1, sub.size());
         assertEquals(size - 2, sm.size());
         assertEquals(size - 2, sm.inverseBidiMap().size());
-        assertEquals(false, sm.containsKey(second));
-        assertEquals(false, sm.containsValue(secondValue));
-        assertEquals(false, sm.inverseBidiMap().containsKey(secondValue));
-        assertEquals(false, sm.inverseBidiMap().containsValue(second));
-        assertEquals(false, sub.containsKey(second));
-        assertEquals(false, sub.containsValue(secondValue));
+        assertFalse(sm.containsKey(second));
+        assertFalse(sm.containsValue(secondValue));
+        assertFalse(sm.inverseBidiMap().containsKey(secondValue));
+        assertFalse(sm.inverseBidiMap().containsValue(second));
+        assertFalse(sub.containsKey(second));
+        assertFalse(sub.containsValue(secondValue));
     }
 
     //-----------------------------------------------------------------------
@@ -611,36 +611,36 @@ public abstract class AbstractSortedBidiMapTest<K extends Comparable<K>, V exten
         it2.next();
         final Map.Entry<K, V> firstEntry = cloneMapEntry(it2.next());
         final Map.Entry<K, V> secondEntry = cloneMapEntry(it2.next());
-        assertEquals(true, sm.containsKey(first));
-        assertEquals(true, sub.containsKey(first));
-        assertEquals(true, set.contains(firstEntry));
-        assertEquals(true, sm.containsKey(second));
-        assertEquals(true, sub.containsKey(second));
-        assertEquals(true, set.contains(secondEntry));
+        assertTrue(sm.containsKey(first));
+        assertTrue(sub.containsKey(first));
+        assertTrue(set.contains(firstEntry));
+        assertTrue(sm.containsKey(second));
+        assertTrue(sub.containsKey(second));
+        assertTrue(set.contains(secondEntry));
 
         set.remove(firstEntry);
         assertEquals(2, sub.size());
         assertEquals(size - 1, sm.size());
         assertEquals(size - 1, sm.inverseBidiMap().size());
-        assertEquals(false, sm.containsKey(firstEntry.getKey()));
-        assertEquals(false, sm.containsValue(firstEntry.getValue()));
-        assertEquals(false, sm.inverseBidiMap().containsKey(firstEntry.getValue()));
-        assertEquals(false, sm.inverseBidiMap().containsValue(firstEntry.getKey()));
-        assertEquals(false, sub.containsKey(firstEntry.getKey()));
-        assertEquals(false, sub.containsValue(firstEntry.getValue()));
-        assertEquals(false, set.contains(firstEntry));
+        assertFalse(sm.containsKey(firstEntry.getKey()));
+        assertFalse(sm.containsValue(firstEntry.getValue()));
+        assertFalse(sm.inverseBidiMap().containsKey(firstEntry.getValue()));
+        assertFalse(sm.inverseBidiMap().containsValue(firstEntry.getKey()));
+        assertFalse(sub.containsKey(firstEntry.getKey()));
+        assertFalse(sub.containsValue(firstEntry.getValue()));
+        assertFalse(set.contains(firstEntry));
 
         set.remove(secondEntry);
         assertEquals(1, sub.size());
         assertEquals(size - 2, sm.size());
         assertEquals(size - 2, sm.inverseBidiMap().size());
-        assertEquals(false, sm.containsKey(secondEntry.getKey()));
-        assertEquals(false, sm.containsValue(secondEntry.getValue()));
-        assertEquals(false, sm.inverseBidiMap().containsKey(secondEntry.getValue()));
-        assertEquals(false, sm.inverseBidiMap().containsValue(secondEntry.getKey()));
-        assertEquals(false, sub.containsKey(secondEntry.getKey()));
-        assertEquals(false, sub.containsValue(secondEntry.getValue()));
-        assertEquals(false, set.contains(secondEntry));
+        assertFalse(sm.containsKey(secondEntry.getKey()));
+        assertFalse(sm.containsValue(secondEntry.getValue()));
+        assertFalse(sm.inverseBidiMap().containsKey(secondEntry.getValue()));
+        assertFalse(sm.inverseBidiMap().containsValue(secondEntry.getKey()));
+        assertFalse(sub.containsKey(secondEntry.getKey()));
+        assertFalse(sub.containsValue(secondEntry.getValue()));
+        assertFalse(set.contains(secondEntry));
     }
 
     //-----------------------------------------------------------------------
diff --git a/src/test/java/org/apache/commons/collections4/collection/AbstractCollectionTest.java b/src/test/java/org/apache/commons/collections4/collection/AbstractCollectionTest.java
index c402c43..2ef8725 100644
--- a/src/test/java/org/apache/commons/collections4/collection/AbstractCollectionTest.java
+++ b/src/test/java/org/apache/commons/collections4/collection/AbstractCollectionTest.java
@@ -33,6 +33,7 @@ import java.util.Iterator;
 import java.util.List;
 import java.util.Map;
 import java.util.NoSuchElementException;
+import java.util.Objects;
 import java.util.function.Predicate;
 
 import org.apache.commons.collections4.AbstractObjectTest;
@@ -282,7 +283,7 @@ public abstract class AbstractCollectionTest<E> extends AbstractObjectTest {
                     // skip values already matched
                     continue;
                 }
-                if (o == confirmedValues[i] || o != null && o.equals(confirmedValues[i])) {
+                if (Objects.equals(o, confirmedValues[i])) {
                     // values matched
                     matched[i] = true;
                     match = true;
@@ -647,16 +648,14 @@ public abstract class AbstractCollectionTest<E> extends AbstractObjectTest {
         resetEmpty();
         elements = getFullElements();
         for (int i = 0; i < elements.length; i++) {
-            assertTrue("Empty collection shouldn't contain element[" + i + "]",
-                    !getCollection().contains(elements[i]));
+            assertFalse("Empty collection shouldn't contain element[" + i + "]", getCollection().contains(elements[i]));
         }
         // make sure calls to "contains" don't change anything
         verify();
 
         elements = getOtherElements();
         for (int i = 0; i < elements.length; i++) {
-            assertTrue("Empty collection shouldn't contain element[" + i + "]",
-                    !getCollection().contains(elements[i]));
+            assertFalse("Empty collection shouldn't contain element[" + i + "]", getCollection().contains(elements[i]));
         }
         // make sure calls to "contains" don't change anything
         verify();
@@ -673,8 +672,7 @@ public abstract class AbstractCollectionTest<E> extends AbstractObjectTest {
         resetFull();
         elements = getOtherElements();
         for (final Object element : elements) {
-            assertTrue("Full collection shouldn't contain element",
-                    !getCollection().contains(element));
+            assertFalse("Full collection shouldn't contain element", getCollection().contains(element));
         }
     }
 
@@ -687,14 +685,13 @@ public abstract class AbstractCollectionTest<E> extends AbstractObjectTest {
         assertTrue("Every Collection should contain all elements of an " +
                 "empty Collection.", getCollection().containsAll(col));
         col.addAll(Arrays.asList(getOtherElements()));
-        assertTrue("Empty Collection shouldn't contain all elements of " +
-                "a non-empty Collection.", !getCollection().containsAll(col));
+        assertFalse("Empty Collection shouldn't contain all elements of " +
+                "a non-empty Collection.", getCollection().containsAll(col));
         // make sure calls to "containsAll" don't change anything
         verify();
 
         resetFull();
-        assertTrue("Full collection shouldn't contain other elements",
-                !getCollection().containsAll(col));
+        assertFalse("Full collection shouldn't contain other elements", getCollection().containsAll(col));
 
         col.clear();
         col.addAll(Arrays.asList(getFullElements()));
@@ -728,12 +725,12 @@ public abstract class AbstractCollectionTest<E> extends AbstractObjectTest {
      */
     public void testCollectionIsEmpty() {
         resetEmpty();
-        assertEquals("New Collection should be empty.", true, getCollection().isEmpty());
+        assertTrue("New Collection should be empty.", getCollection().isEmpty());
         // make sure calls to "isEmpty() don't change anything
         verify();
 
         resetFull();
-        assertEquals("Full collection shouldn't be empty", false, getCollection().isEmpty());
+        assertFalse("Full collection shouldn't be empty", getCollection().isEmpty());
         // make sure calls to "isEmpty() don't change anything
         verify();
     }
@@ -744,7 +741,7 @@ public abstract class AbstractCollectionTest<E> extends AbstractObjectTest {
     public void testCollectionIterator() {
         resetEmpty();
         Iterator<E> it1 = getCollection().iterator();
-        assertEquals("Iterator for empty Collection shouldn't have next.", false, it1.hasNext());
+        assertFalse("Iterator for empty Collection shouldn't have next.", it1.hasNext());
         try {
             it1.next();
             fail("Iterator at end of Collection should throw "
@@ -761,7 +758,7 @@ public abstract class AbstractCollectionTest<E> extends AbstractObjectTest {
             assertTrue("Iterator for full collection should haveNext", it1.hasNext());
             it1.next();
         }
-        assertTrue("Iterator should be finished", !it1.hasNext());
+        assertFalse("Iterator should be finished", it1.hasNext());
 
         final ArrayList<E> list = new ArrayList<>();
         it1 = getCollection().iterator();
@@ -871,7 +868,7 @@ public abstract class AbstractCollectionTest<E> extends AbstractObjectTest {
 
         resetFull();
         for (final E element : other) {
-            assertTrue("Shouldn't remove nonexistent other element", !getCollection().remove(element));
+            assertFalse("Shouldn't remove nonexistent other element", getCollection().remove(element));
             verify();
         }
 
@@ -916,12 +913,10 @@ public abstract class AbstractCollectionTest<E> extends AbstractObjectTest {
         verify();
 
         resetFull();
-        assertTrue("Full collection removeAll should return false for empty input",
-                   !getCollection().removeAll(Collections.EMPTY_SET));
+        assertFalse("Full collection removeAll should return false for empty input", getCollection().removeAll(Collections.EMPTY_SET));
         verify();
 
-        assertTrue("Full collection removeAll should return false for other elements",
-                   !getCollection().removeAll(Arrays.asList(getOtherElements())));
+        assertFalse("Full collection removeAll should return false for other elements", getCollection().removeAll(Arrays.asList(getOtherElements())));
         verify();
 
         assertTrue("Full collection removeAll should return true for full elements",
@@ -941,7 +936,7 @@ public abstract class AbstractCollectionTest<E> extends AbstractObjectTest {
 
         assertTrue("Collection should shrink after removeAll", getCollection().size() < size);
         for (final E element : all) {
-            assertTrue("Collection shouldn't contain removed element", !getCollection().contains(element));
+            assertFalse("Collection shouldn't contain removed element", getCollection().contains(element));
         }
     }
 
@@ -955,17 +950,14 @@ public abstract class AbstractCollectionTest<E> extends AbstractObjectTest {
         }
 
         resetEmpty();
-        assertTrue("Empty collection removeIf should return false for a predicate that returns only false",
-                !getCollection().removeIf(e -> false));
+        assertFalse("Empty collection removeIf should return false for a predicate that returns only false", getCollection().removeIf(e -> false));
         verify();
 
-        assertTrue("Empty collection removeIf should return false for a predicate that returns only true",
-                !getCollection().removeIf(e -> true));
+        assertFalse("Empty collection removeIf should return false for a predicate that returns only true", getCollection().removeIf(e -> true));
         verify();
 
         resetFull();
-        assertTrue("Full collection removeIf should return false for a predicate that returns only false",
-                !getCollection().removeIf(e -> false));
+        assertFalse("Full collection removeIf should return false for a predicate that returns only false", getCollection().removeIf(e -> false));
         verify();
 
         assertTrue("Full collection removeIf should return true for a predicate that returns only true",
@@ -988,8 +980,8 @@ public abstract class AbstractCollectionTest<E> extends AbstractObjectTest {
         getConfirmed().removeIf(filter);
         verify();
 
-        assertTrue("Collection should shrink after removeIf", getCollection().size() == size - targetCount);
-        assertTrue("Collection shouldn't contain removed element", !getCollection().contains(target));
+        assertEquals("Collection should shrink after removeIf", getCollection().size(), size - targetCount);
+        assertFalse("Collection shouldn't contain removed element", getCollection().contains(target));
     }
 
     /**
@@ -1004,11 +996,10 @@ public abstract class AbstractCollectionTest<E> extends AbstractObjectTest {
         final List<E> elements = Arrays.asList(getFullElements());
         final List<E> other = Arrays.asList(getOtherElements());
 
-        assertTrue("Empty retainAll() should return false",
-                !getCollection().retainAll(Collections.EMPTY_SET));
+        assertFalse("Empty retainAll() should return false", getCollection().retainAll(Collections.EMPTY_SET));
         verify();
 
-        assertTrue("Empty retainAll() should return false", !getCollection().retainAll(elements));
+        assertFalse("Empty retainAll() should return false", getCollection().retainAll(elements));
         verify();
 
         resetFull();
@@ -1024,8 +1015,7 @@ public abstract class AbstractCollectionTest<E> extends AbstractObjectTest {
 
         resetFull();
         int size = getCollection().size();
-        assertTrue("Collection shouldn't change from retainAll elements",
-                   !getCollection().retainAll(elements));
+        assertFalse("Collection shouldn't change from retainAll elements", getCollection().retainAll(elements));
         verify();
         assertEquals("Collection size shouldn't change", size, getCollection().size());
 
@@ -1047,8 +1037,8 @@ public abstract class AbstractCollectionTest<E> extends AbstractObjectTest {
         resetFull();
         final HashSet<E> set = new HashSet<>(elements);
         size = getCollection().size();
-        assertTrue("Collection shouldn't change from retainAll without " +
-                   "duplicate elements", !getCollection().retainAll(set));
+        assertFalse("Collection shouldn't change from retainAll without " +
+                "duplicate elements", getCollection().retainAll(set));
         verify();
         assertEquals("Collection size didn't change from nonduplicate " +
                      "retainAll", size, getCollection().size());
@@ -1093,8 +1083,7 @@ public abstract class AbstractCollectionTest<E> extends AbstractObjectTest {
                 if (matched[j]) {
                     continue;
                 }
-                if (array[i] == confirmedArray[j]
-                        || array[i] != null && array[i].equals(confirmedArray[j])) {
+                if (Objects.equals(array[i], confirmedArray[j])) {
                     matched[j] = true;
                     match = true;
                     break;
@@ -1106,8 +1095,7 @@ public abstract class AbstractCollectionTest<E> extends AbstractObjectTest {
             }
         }
         for (final boolean element : matched) {
-            assertEquals("Collection should return all its elements in " + "toArray", true,
-                    element);
+            assertTrue("Collection should return all its elements in " + "toArray", element);
         }
     }
 
@@ -1174,10 +1162,10 @@ public abstract class AbstractCollectionTest<E> extends AbstractObjectTest {
      */
     public void testCollectionToString() {
         resetEmpty();
-        assertTrue("toString shouldn't return null", getCollection().toString() != null);
+        assertNotNull("toString shouldn't return null", getCollection().toString());
 
         resetFull();
-        assertTrue("toString shouldn't return null", getCollection().toString() != null);
+        assertNotNull("toString shouldn't return null", getCollection().toString());
     }
 
     /**
diff --git a/src/test/java/org/apache/commons/collections4/collection/CompositeCollectionTest.java b/src/test/java/org/apache/commons/collections4/collection/CompositeCollectionTest.java
index b1f2984..a0e8a06 100644
--- a/src/test/java/org/apache/commons/collections4/collection/CompositeCollectionTest.java
+++ b/src/test/java/org/apache/commons/collections4/collection/CompositeCollectionTest.java
@@ -81,9 +81,7 @@ public class CompositeCollectionTest<E> extends AbstractCollectionTest<E> {
      */
     @Override
     public Collection<E> makeConfirmedFullCollection() {
-        final Collection<E> collection = new HashSet<>();
-        collection.addAll(Arrays.asList(getFullElements()));
-        return collection;
+        return new HashSet<>(Arrays.asList(getFullElements()));
     }
     /**
      * Full collection consists of 4 collections, each with one element
@@ -188,8 +186,7 @@ public class CompositeCollectionTest<E> extends AbstractCollectionTest<E> {
         one.add((E) "1");
         two.add((E) "2");
         c.addComposited(one, two);
-        final Collection<E> toCollection = new HashSet<>();
-        toCollection.addAll(c);
+        final Collection<E> toCollection = new HashSet<>(c);
         assertTrue(toCollection.containsAll(c));
         assertEquals(c.size(), toCollection.size());
     }
@@ -281,7 +278,7 @@ public class CompositeCollectionTest<E> extends AbstractCollectionTest<E> {
         c.addComposited(empty);
         assertTrue(c.isEmpty());
         empty.add((E) "a");
-        assertTrue(!c.isEmpty());
+        assertFalse(c.isEmpty());
     }
 
     @SuppressWarnings("unchecked")
@@ -297,8 +294,8 @@ public class CompositeCollectionTest<E> extends AbstractCollectionTest<E> {
         assertTrue(one.contains(next));
         next = i.next();
         i.remove();
-        assertTrue(!c.contains(next));
-        assertTrue(!two.contains(next));
+        assertFalse(c.contains(next));
+        assertFalse(two.contains(next));
     }
 
     @SuppressWarnings("unchecked")
@@ -322,9 +319,9 @@ public class CompositeCollectionTest<E> extends AbstractCollectionTest<E> {
         two.add((E) "1");
         c.addComposited(one, two);
         c.remove("1");
-        assertTrue(!c.contains("1"));
-        assertTrue(!one.contains("1"));
-        assertTrue(!two.contains("1"));
+        assertFalse(c.contains("1"));
+        assertFalse(one.contains("1"));
+        assertFalse(two.contains("1"));
     }
 
     @SuppressWarnings("unchecked")
@@ -341,9 +338,9 @@ public class CompositeCollectionTest<E> extends AbstractCollectionTest<E> {
         assertTrue(!one.contains("1"));
         assertTrue(!two.contains("1"));
         c.removeAll(null);
-        assertTrue(!c.contains("1"));
-        assertTrue(!one.contains("1"));
-        assertTrue(!two.contains("1"));
+        assertFalse(c.contains("1"));
+        assertFalse(one.contains("1"));
+        assertFalse(two.contains("1"));
     }
 
     /**
@@ -388,13 +385,13 @@ public class CompositeCollectionTest<E> extends AbstractCollectionTest<E> {
         two.add((E) "1");
         c.addComposited(one);
         c.retainAll(two);
-        assertTrue(!c.contains("2"));
-        assertTrue(!one.contains("2"));
+        assertFalse(c.contains("2"));
+        assertFalse(one.contains("2"));
         assertTrue(c.contains("1"));
         assertTrue(one.contains("1"));
         c.retainAll(null);
-        assertTrue(!c.contains("2"));
-        assertTrue(!one.contains("2"));
+        assertFalse(c.contains("2"));
+        assertFalse(one.contains("2"));
         assertTrue(c.contains("1"));
         assertTrue(one.contains("1"));
     }
@@ -419,7 +416,7 @@ public class CompositeCollectionTest<E> extends AbstractCollectionTest<E> {
         assertTrue(foo.containsAll(c));
         assertEquals(c.size(), foo.size());
         one.add((E) "3");
-        assertTrue(!foo.containsAll(c));
+        assertFalse(foo.containsAll(c));
     }
 
     /**
diff --git a/src/test/java/org/apache/commons/collections4/collection/PredicatedCollectionTest.java b/src/test/java/org/apache/commons/collections4/collection/PredicatedCollectionTest.java
index 6fe953b..1fdf575 100644
--- a/src/test/java/org/apache/commons/collections4/collection/PredicatedCollectionTest.java
+++ b/src/test/java/org/apache/commons/collections4/collection/PredicatedCollectionTest.java
@@ -62,16 +62,13 @@ public class PredicatedCollectionTest<E> extends AbstractCollectionTest<E> {
 
     @Override
     public Collection<E> makeFullCollection() {
-        final List<E> list = new ArrayList<>();
-        list.addAll(Arrays.asList(getFullElements()));
+        final List<E> list = new ArrayList<>(Arrays.asList(getFullElements()));
         return decorateCollection(list, truePredicate);
     }
 
     @Override
     public Collection<E> makeConfirmedFullCollection() {
-        final List<E> list = new ArrayList<>();
-        list.addAll(Arrays.asList(getFullElements()));
-        return list;
+        return new ArrayList<>(Arrays.asList(getFullElements()));
     }
 
     //-----------------------------------------------------------------------
@@ -85,15 +82,14 @@ public class PredicatedCollectionTest<E> extends AbstractCollectionTest<E> {
     @SuppressWarnings("unchecked")
     public void testIllegalAdd() {
         final Collection<E> c = makeTestCollection();
-        final Integer i = Integer.valueOf(3);
+        final Integer i = 3;
         try {
             c.add((E) i);
             fail("Integer should fail string predicate.");
         } catch (final IllegalArgumentException e) {
             // expected
         }
-        assertTrue("Collection shouldn't contain illegal element",
-            !c.contains(i));
+        assertFalse("Collection shouldn't contain illegal element", c.contains(i));
     }
 
     @SuppressWarnings("unchecked")
@@ -110,10 +106,10 @@ public class PredicatedCollectionTest<E> extends AbstractCollectionTest<E> {
         } catch (final IllegalArgumentException e) {
             // expected
         }
-        assertTrue("Collection shouldn't contain illegal element", !c.contains("one"));
-        assertTrue("Collection shouldn't contain illegal element", !c.contains("two"));
-        assertTrue("Collection shouldn't contain illegal element", !c.contains(Integer.valueOf(3)));
-        assertTrue("Collection shouldn't contain illegal element", !c.contains("four"));
+        assertFalse("Collection shouldn't contain illegal element", c.contains("one"));
+        assertFalse("Collection shouldn't contain illegal element", c.contains("two"));
+        assertFalse("Collection shouldn't contain illegal element", c.contains(3));
+        assertFalse("Collection shouldn't contain illegal element", c.contains("four"));
     }
 
     @Override
diff --git a/src/test/java/org/apache/commons/collections4/collection/TransformedCollectionTest.java b/src/test/java/org/apache/commons/collections4/collection/TransformedCollectionTest.java
index cd81550..0898c6a 100644
--- a/src/test/java/org/apache/commons/collections4/collection/TransformedCollectionTest.java
+++ b/src/test/java/org/apache/commons/collections4/collection/TransformedCollectionTest.java
@@ -63,9 +63,7 @@ public class TransformedCollectionTest extends AbstractCollectionTest<Object> {
 
     @Override
     public Collection<Object> makeConfirmedFullCollection() {
-        final List<Object> list = new ArrayList<>();
-        list.addAll(Arrays.asList(getFullElements()));
-        return list;
+        return new ArrayList<>(Arrays.asList(getFullElements()));
     }
 
     @Override
@@ -75,8 +73,7 @@ public class TransformedCollectionTest extends AbstractCollectionTest<Object> {
 
     @Override
     public Collection<Object> makeFullCollection() {
-        final List<Object> list = new ArrayList<>();
-        list.addAll(Arrays.asList(getFullElements()));
+        final List<Object> list = new ArrayList<>(Arrays.asList(getFullElements()));
         return TransformedCollection.transformingCollection(list, NOOP_TRANSFORMER);
     }
 
@@ -99,11 +96,11 @@ public class TransformedCollectionTest extends AbstractCollectionTest<Object> {
         for (int i = 0; i < elements.length; i++) {
             coll.add(elements[i]);
             assertEquals(i + 1, coll.size());
-            assertEquals(true, coll.contains(Integer.valueOf((String) elements[i])));
-            assertEquals(false, coll.contains(elements[i]));
+            assertTrue(coll.contains(Integer.valueOf((String) elements[i])));
+            assertFalse(coll.contains(elements[i]));
         }
 
-        assertEquals(true, coll.remove(Integer.valueOf((String) elements[0])));
+        assertTrue(coll.remove(Integer.valueOf((String) elements[0])));
     }
 
     public void testTransformedCollection_decorateTransform() {
@@ -113,12 +110,12 @@ public class TransformedCollectionTest extends AbstractCollectionTest<Object> {
         final Collection<Object> collection = TransformedCollection.transformedCollection(originalCollection, TransformedCollectionTest.STRING_TO_INTEGER_TRANSFORMER);
         assertEquals(elements.length, collection.size());
         for (final Object element : elements) {
-            assertEquals(true, collection.contains(Integer.valueOf((String) element)));
-            assertEquals(false, collection.contains(element));
+            assertTrue(collection.contains(Integer.valueOf((String) element)));
+            assertFalse(collection.contains(element));
         }
 
-        assertEquals(false, collection.remove(elements[0]));
-        assertEquals(true, collection.remove(Integer.valueOf((String) elements[0])));
+        assertFalse(collection.remove(elements[0]));
+        assertTrue(collection.remove(Integer.valueOf((String) elements[0])));
     }
 
     @Override
diff --git a/src/test/java/org/apache/commons/collections4/comparators/AbstractComparatorTest.java b/src/test/java/org/apache/commons/collections4/comparators/AbstractComparatorTest.java
index 6309927..c58fc61 100644
--- a/src/test/java/org/apache/commons/collections4/comparators/AbstractComparatorTest.java
+++ b/src/test/java/org/apache/commons/collections4/comparators/AbstractComparatorTest.java
@@ -97,7 +97,7 @@ public abstract class AbstractComparatorTest<T> extends AbstractObjectTest {
      * Sort the list.
      */
     protected void sortObjects(final List<T> list, final Comparator<? super T> comparator) {
-        Collections.sort(list, comparator);
+        list.sort(comparator);
     }
 
     //-----------------------------------------------------------------------
@@ -111,7 +111,7 @@ public abstract class AbstractComparatorTest<T> extends AbstractObjectTest {
 
         final List<T> list2 = new LinkedList<>();
 
-        assertTrue("Comparator cannot sort empty lists", list2.equals(list));
+        assertEquals("Comparator cannot sort empty lists", list2, list);
     }
 
     /**
@@ -127,8 +127,7 @@ public abstract class AbstractComparatorTest<T> extends AbstractObjectTest {
 
         final List<T> orderedList = getComparableObjectsOrdered();
 
-        assertTrue("Comparator did not reorder the List correctly",
-                   orderedList.equals(randomList));
+        assertEquals("Comparator did not reorder the List correctly", orderedList, randomList);
     }
 
     /**
@@ -151,9 +150,7 @@ public abstract class AbstractComparatorTest<T> extends AbstractObjectTest {
         }
         */
 
-        assertTrue("Comparator did not reorder the List correctly",
-                   orderedList.equals(randomList));
-
+        assertEquals("Comparator did not reorder the List correctly", orderedList, randomList);
     }
 
     /**
@@ -216,9 +213,7 @@ public abstract class AbstractComparatorTest<T> extends AbstractObjectTest {
 
             final List<T> orderedList = getComparableObjectsOrdered();
 
-            assertTrue("Comparator did not reorder the List correctly",
-                       orderedList.equals(randomList));
+            assertEquals("Comparator did not reorder the List correctly", orderedList, randomList);
         }
     }
-
 }
diff --git a/src/test/java/org/apache/commons/collections4/comparators/BooleanComparatorTest.java b/src/test/java/org/apache/commons/collections4/comparators/BooleanComparatorTest.java
index 5b5c007..41067b9 100644
--- a/src/test/java/org/apache/commons/collections4/comparators/BooleanComparatorTest.java
+++ b/src/test/java/org/apache/commons/collections4/comparators/BooleanComparatorTest.java
@@ -17,11 +17,14 @@
 package org.apache.commons.collections4.comparators;
 
 import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.Comparator;
 import java.util.List;
 
 import org.junit.Test;
 
+import static org.junit.Assert.assertNotEquals;
+
 /**
  * Tests for {@link BooleanComparator}.
  *
@@ -46,14 +49,8 @@ public class BooleanComparatorTest extends AbstractComparatorTest<Boolean> {
 
     @Override
     public List<Boolean> getComparableObjectsOrdered() {
-        final List<Boolean> list = new ArrayList<>();
-        list.add(new Boolean(false));
-        list.add(Boolean.FALSE);
-        list.add(new Boolean(false));
-        list.add(Boolean.TRUE);
-        list.add(new Boolean(true));
-        list.add(true);
-        return list;
+        return new ArrayList<>(Arrays.asList(Boolean.FALSE, Boolean.FALSE, Boolean.FALSE, Boolean.TRUE, Boolean.TRUE,
+                true));
     }
 
     @Override
@@ -95,8 +92,8 @@ public class BooleanComparatorTest extends AbstractComparatorTest<Boolean> {
         assertEquals(new BooleanComparator(true), BooleanComparator.getTrueFirstComparator());
         assertSame(BooleanComparator.getTrueFirstComparator(), BooleanComparator.booleanComparator(true));
 
-        assertTrue(!new BooleanComparator().equals(new BooleanComparator(true)));
-        assertTrue(!new BooleanComparator(true).equals(new BooleanComparator(false)));
+        assertNotEquals(new BooleanComparator(), new BooleanComparator(true));
+        assertNotEquals(new BooleanComparator(true), new BooleanComparator(false));
     }
 
     // utilities
diff --git a/src/test/java/org/apache/commons/collections4/comparators/ComparatorChainTest.java b/src/test/java/org/apache/commons/collections4/comparators/ComparatorChainTest.java
index c0b4cf4..9ddc8da 100644
--- a/src/test/java/org/apache/commons/collections4/comparators/ComparatorChainTest.java
+++ b/src/test/java/org/apache/commons/collections4/comparators/ComparatorChainTest.java
@@ -17,6 +17,7 @@
 package org.apache.commons.collections4.comparators;
 
 import java.io.Serializable;
+import java.util.Arrays;
 import java.util.Comparator;
 import java.util.LinkedList;
 import java.util.List;
@@ -53,19 +54,19 @@ public class ComparatorChainTest extends AbstractComparatorTest<ComparatorChainT
     @Test
     public void testNoopComparatorChain() {
         final ComparatorChain<Integer> chain = new ComparatorChain<>();
-        final Integer i1 = Integer.valueOf(4);
-        final Integer i2 = Integer.valueOf(6);
-        chain.addComparator(new ComparableComparator<Integer>());
+        final Integer i1 = 4;
+        final Integer i2 = 6;
+        chain.addComparator(new ComparableComparator<>());
 
         final int correctValue = i1.compareTo(i2);
-        assertTrue("Comparison returns the right order", chain.compare(i1, i2) == correctValue);
+        assertEquals("Comparison returns the right order", chain.compare(i1, i2), correctValue);
     }
 
     @Test
     public void testBadNoopComparatorChain() {
         final ComparatorChain<Integer> chain = new ComparatorChain<>();
-        final Integer i1 = Integer.valueOf(4);
-        final Integer i2 = Integer.valueOf(6);
+        final Integer i1 = 4;
+        final Integer i2 = 6;
         try {
             chain.compare(i1, i2);
             fail("An exception should be thrown when a chain contains zero comparators.");
@@ -76,21 +77,21 @@ public class ComparatorChainTest extends AbstractComparatorTest<ComparatorChainT
     @Test
     public void testListComparatorChain() {
         final List<Comparator<Integer>> list = new LinkedList<>();
-        list.add(new ComparableComparator<Integer>());
+        list.add(new ComparableComparator<>());
         final ComparatorChain<Integer> chain = new ComparatorChain<>(list);
-        final Integer i1 = Integer.valueOf(4);
-        final Integer i2 = Integer.valueOf(6);
+        final Integer i1 = 4;
+        final Integer i2 = 6;
 
         final int correctValue = i1.compareTo(i2);
-        assertTrue("Comparison returns the right order", chain.compare(i1, i2) == correctValue);
+        assertEquals("Comparison returns the right order", chain.compare(i1, i2), correctValue);
     }
 
     @Test
     public void testBadListComparatorChain() {
         final List<Comparator<Integer>> list = new LinkedList<>();
         final ComparatorChain<Integer> chain = new ComparatorChain<>(list);
-        final Integer i1 = Integer.valueOf(4);
-        final Integer i2 = Integer.valueOf(6);
+        final Integer i1 = 4;
+        final Integer i2 = 6;
         try {
             chain.compare(i1, i2);
             fail("An exception should be thrown when a chain contains zero comparators.");
@@ -114,24 +115,18 @@ public class ComparatorChainTest extends AbstractComparatorTest<ComparatorChainT
             return 0;
         }, true);
 
-        assertTrue(chain.compare(Integer.valueOf(4), Integer.valueOf(5)) > 0);
-        assertTrue(chain.compare(Integer.valueOf(5), Integer.valueOf(4)) < 0);
-        assertTrue(chain.compare(Integer.valueOf(4), Integer.valueOf(4)) == 0);
+        assertTrue(chain.compare(4, 5) > 0);
+        assertTrue(chain.compare(5, 4) < 0);
+        assertEquals(0, chain.compare(4, 4));
     }
 
     @Override
     public List<PseudoRow> getComparableObjectsOrdered() {
-        final List<PseudoRow> list = new LinkedList<>();
         // this is the correct order assuming a
         // "0th forward, 1st reverse, 2nd forward" sort
-        list.add(new PseudoRow(1, 2, 3));
-        list.add(new PseudoRow(2, 3, 5));
-        list.add(new PseudoRow(2, 2, 4));
-        list.add(new PseudoRow(2, 2, 8));
-        list.add(new PseudoRow(3, 1, 0));
-        list.add(new PseudoRow(4, 4, 4));
-        list.add(new PseudoRow(4, 4, 7));
-        return list;
+        return new LinkedList<>(Arrays.asList(new PseudoRow(1, 2, 3), new PseudoRow(2, 3, 5),
+                new PseudoRow(2, 2, 4), new PseudoRow(2, 2, 8), new PseudoRow(3, 1, 0),
+                new PseudoRow(4, 4, 4), new PseudoRow(4, 4, 7)));
     }
 
     public static class PseudoRow implements Serializable {
@@ -140,7 +135,7 @@ public class ComparatorChainTest extends AbstractComparatorTest<ComparatorChainT
          * Generated serial version ID.
          */
         private static final long serialVersionUID = 8085570439751032499L;
-        public int cols[] = new int[3];
+        public int[] cols = new int[3];
 
         public PseudoRow(final int col1, final int col2, final int col3) {
             cols[0] = col1;
@@ -154,15 +149,7 @@ public class ComparatorChainTest extends AbstractComparatorTest<ComparatorChainT
 
         @Override
         public String toString() {
-            final StringBuilder buf = new StringBuilder();
-            buf.append("[");
-            buf.append(cols[0]);
-            buf.append(",");
-            buf.append(cols[1]);
-            buf.append(",");
-            buf.append(cols[2]);
-            buf.append("]");
-            return buf.toString();
+            return "[" + cols[0] + "," + cols[1] + "," + cols[2] + "]";
         }
 
         @Override
@@ -172,21 +159,9 @@ public class ComparatorChainTest extends AbstractComparatorTest<ComparatorChainT
             }
 
             final PseudoRow row = (PseudoRow) o;
-            if (getColumn(0) != row.getColumn(0)) {
-                return false;
-            }
-
-            if (getColumn(1) != row.getColumn(1)) {
-                return false;
-            }
-
-            if (getColumn(2) != row.getColumn(2)) {
-                return false;
-            }
 
-            return true;
+            return getColumn(0) == row.getColumn(0) && getColumn(1) == row.getColumn(1) && getColumn(2) == row.getColumn(2);
         }
-
     }
 
     public static class ColumnComparator implements Comparator<PseudoRow>, Serializable {
@@ -200,17 +175,7 @@ public class ComparatorChainTest extends AbstractComparatorTest<ComparatorChainT
 
         @Override
         public int compare(final PseudoRow o1, final PseudoRow o2) {
-
-            final int col1 = o1.getColumn(colIndex);
-            final int col2 = o2.getColumn(colIndex);
-
-            if (col1 > col2) {
-                return 1;
-            }
-            if (col1 < col2) {
-                return -1;
-            }
-            return 0;
+            return Integer.compare(o1.getColumn(colIndex), o2.getColumn(colIndex));
         }
 
         @Override
diff --git a/src/test/java/org/apache/commons/collections4/comparators/FixedOrderComparatorTest.java b/src/test/java/org/apache/commons/collections4/comparators/FixedOrderComparatorTest.java
index d3fc4ee..97ace60 100644
--- a/src/test/java/org/apache/commons/collections4/comparators/FixedOrderComparatorTest.java
+++ b/src/test/java/org/apache/commons/collections4/comparators/FixedOrderComparatorTest.java
@@ -60,8 +60,7 @@ public class FixedOrderComparatorTest extends AbstractComparatorTest<String> {
 
     @Override
     public Comparator<String> makeObject() {
-        final FixedOrderComparator<String> comparator = new FixedOrderComparator<>(topCities);
-        return comparator;
+        return new FixedOrderComparator<>(topCities);
     }
 
     @Override
@@ -141,9 +140,9 @@ public class FixedOrderComparatorTest extends AbstractComparatorTest<String> {
     @Test
     public void testLock() {
         final FixedOrderComparator<String> comparator = new FixedOrderComparator<>(topCities);
-        assertEquals(false, comparator.isLocked());
+        assertFalse(comparator.isLocked());
         comparator.compare("New York", "Tokyo");
-        assertEquals(true, comparator.isLocked());
+        assertTrue(comparator.isLocked());
         try {
             comparator.add("Minneapolis");
             fail("Should have thrown an UnsupportedOperationException");
@@ -225,9 +224,10 @@ public class FixedOrderComparatorTest extends AbstractComparatorTest<String> {
             }
 
             // testShuffle
-            for (int i = 0; i < keys.length && !isInNewOrder; i++) {
-                if ( !orderedObjects[i].equals(keys[i])) {
+            for (int i = 0; i < keys.length; i++) {
+                if (!orderedObjects[i].equals(keys[i])) {
                     isInNewOrder = true;
+                    break;
                 }
             }
         }
@@ -240,5 +240,4 @@ public class FixedOrderComparatorTest extends AbstractComparatorTest<String> {
             assertEquals(orderedObjects[i], keys[i]);
         }
     }
-
 }
diff --git a/src/test/java/org/apache/commons/collections4/functors/AbstractPredicateTest.java b/src/test/java/org/apache/commons/collections4/functors/AbstractPredicateTest.java
index 3f6614a..9ef75cf 100644
--- a/src/test/java/org/apache/commons/collections4/functors/AbstractPredicateTest.java
+++ b/src/test/java/org/apache/commons/collections4/functors/AbstractPredicateTest.java
@@ -44,11 +44,11 @@ public abstract class AbstractPredicateTest {
      */
     protected abstract Predicate<?> generatePredicate();
 
-    protected <T> void assertFalse(final Predicate<T> predicate, final T testObject) {
+    protected <T> void assertPredicateFalse(final Predicate<T> predicate, final T testObject) {
         Assert.assertFalse(predicate.evaluate(testObject));
     }
 
-    protected <T> void assertTrue(final Predicate<T> predicate, final T testObject) {
+    protected <T> void assertPredicateTrue(final Predicate<T> predicate, final T testObject) {
         Assert.assertTrue(predicate.evaluate(testObject));
     }
 }
diff --git a/src/test/java/org/apache/commons/collections4/functors/ComparatorPredicateTest.java b/src/test/java/org/apache/commons/collections4/functors/ComparatorPredicateTest.java
index 2bdb650..afda1fc 100644
--- a/src/test/java/org/apache/commons/collections4/functors/ComparatorPredicateTest.java
+++ b/src/test/java/org/apache/commons/collections4/functors/ComparatorPredicateTest.java
@@ -36,45 +36,45 @@ public class ComparatorPredicateTest extends AbstractPredicateTest {
     public void compareEquals() {
         final Integer value = Integer.valueOf(10);
         final Predicate<Integer> p = comparatorPredicate(value, new TestComparator<Integer>());
-        assertFalse(p, Integer.valueOf(value.intValue() - 1));
-        assertTrue(p, Integer.valueOf(value.intValue()));
-        assertFalse(p, Integer.valueOf(value.intValue() + 1));
+        assertPredicateFalse(p, Integer.valueOf(value.intValue() - 1));
+        assertPredicateTrue(p, Integer.valueOf(value.intValue()));
+        assertPredicateFalse(p, Integer.valueOf(value.intValue() + 1));
     }
 
     @Test
     public void compareGreater() {
         final Integer value = Integer.valueOf(10);
         final Predicate<Integer> p = comparatorPredicate(value, new TestComparator<Integer>(), Criterion.GREATER);
-        assertTrue(p, Integer.valueOf(value.intValue() - 1));
-        assertFalse(p, Integer.valueOf(value.intValue()));
-        assertFalse(p, Integer.valueOf(value.intValue() + 1));
+        assertPredicateTrue(p, Integer.valueOf(value.intValue() - 1));
+        assertPredicateFalse(p, Integer.valueOf(value.intValue()));
+        assertPredicateFalse(p, Integer.valueOf(value.intValue() + 1));
     }
 
     @Test
     public void compareLess() {
         final Integer value = Integer.valueOf(10);
         final Predicate<Integer> p = comparatorPredicate(value, new TestComparator<Integer>(), Criterion.LESS);
-        assertFalse(p, Integer.valueOf(value.intValue() - 1));
-        assertFalse(p, Integer.valueOf(value.intValue()));
-        assertTrue(p, Integer.valueOf(value.intValue() + 1));
+        assertPredicateFalse(p, Integer.valueOf(value.intValue() - 1));
+        assertPredicateFalse(p, Integer.valueOf(value.intValue()));
+        assertPredicateTrue(p, Integer.valueOf(value.intValue() + 1));
     }
 
     @Test
     public void compareGreaterOrEqual() {
         final Integer value = Integer.valueOf(10);
         final Predicate<Integer> p = comparatorPredicate(value, new TestComparator<Integer>(), Criterion.GREATER_OR_EQUAL);
-        assertTrue(p, Integer.valueOf(value.intValue() - 1));
-        assertTrue(p, Integer.valueOf(value.intValue()));
-        assertFalse(p, Integer.valueOf(value.intValue() + 1));
+        assertPredicateTrue(p, Integer.valueOf(value.intValue() - 1));
+        assertPredicateTrue(p, Integer.valueOf(value.intValue()));
+        assertPredicateFalse(p, Integer.valueOf(value.intValue() + 1));
     }
 
     @Test
     public void compareLessOrEqual() {
         final Integer value = Integer.valueOf(10);
         final Predicate<Integer> p = comparatorPredicate(value, new TestComparator<Integer>(), Criterion.LESS_OR_EQUAL);
-        assertFalse(p, Integer.valueOf(value.intValue() - 1));
-        assertTrue(p, Integer.valueOf(value.intValue()));
-        assertTrue(p, Integer.valueOf(value.intValue() + 1));
+        assertPredicateFalse(p, Integer.valueOf(value.intValue() - 1));
+        assertPredicateTrue(p, Integer.valueOf(value.intValue()));
+        assertPredicateTrue(p, Integer.valueOf(value.intValue() + 1));
     }
 
     @Override
diff --git a/src/test/java/org/apache/commons/collections4/functors/EqualPredicateTest.java b/src/test/java/org/apache/commons/collections4/functors/EqualPredicateTest.java
index 4cc4c91..3ff4861 100644
--- a/src/test/java/org/apache/commons/collections4/functors/EqualPredicateTest.java
+++ b/src/test/java/org/apache/commons/collections4/functors/EqualPredicateTest.java
@@ -41,15 +41,15 @@ public class EqualPredicateTest extends AbstractPredicateTest {
     @Test
     public void objectFactoryUsesEqualsForTest() throws Exception {
         final Predicate<EqualsTestObject> predicate = equalPredicate(FALSE_OBJECT);
-        assertFalse(predicate, FALSE_OBJECT);
-        assertTrue(equalPredicate(TRUE_OBJECT), TRUE_OBJECT);
+        assertPredicateFalse(predicate, FALSE_OBJECT);
+        assertPredicateTrue(equalPredicate(TRUE_OBJECT), TRUE_OBJECT);
     }
 
     @SuppressWarnings("boxing")
     @Test
     public void testPredicateTypeCanBeSuperClassOfObject() throws Exception {
         final Predicate<Number> predicate = equalPredicate((Number) 4);
-        assertTrue(predicate, 4);
+        assertPredicateTrue(predicate, 4);
     }
 
     public static class EqualsTestObject {
diff --git a/src/test/java/org/apache/commons/collections4/functors/NullPredicateTest.java b/src/test/java/org/apache/commons/collections4/functors/NullPredicateTest.java
index 2df59fc..652f7c8 100644
--- a/src/test/java/org/apache/commons/collections4/functors/NullPredicateTest.java
+++ b/src/test/java/org/apache/commons/collections4/functors/NullPredicateTest.java
@@ -26,13 +26,13 @@ public class NullPredicateTest extends AbstractPredicateTest {
     @Test
     public void testNullPredicate() {
         assertSame(NullPredicate.nullPredicate(), NullPredicate.nullPredicate());
-        assertTrue(nullPredicate(), null);
+        assertPredicateTrue(nullPredicate(), null);
     }
 
     @Test
     public void ensurePredicateCanBeTypedWithoutWarning() throws Exception {
         final Predicate<String> predicate = NullPredicate.nullPredicate();
-        assertFalse(predicate, cString);
+        assertPredicateFalse(predicate, cString);
     }
 
     @Override