[commons-collections] branch master updated: add a junit for the HeadMap in the UnmodifiableSortedMapTest (#93)

[gg...@apache.org]

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ggregory 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 66cc90f  add a junit for the HeadMap in the UnmodifiableSortedMapTest (#93)
66cc90f is described below

commit 66cc90ff1d3e346c8771b8f8e520f97de15405e5
Author: dota17 <50...@users.noreply.github.com>
AuthorDate: Tue Oct 29 02:02:59 2019 +0800

    add a junit for the HeadMap in the UnmodifiableSortedMapTest (#93)
---
 .../commons/collections4/map/UnmodifiableSortedMapTest.java      | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/src/test/java/org/apache/commons/collections4/map/UnmodifiableSortedMapTest.java b/src/test/java/org/apache/commons/collections4/map/UnmodifiableSortedMapTest.java
index fd6c5fa..73041dd 100644
--- a/src/test/java/org/apache/commons/collections4/map/UnmodifiableSortedMapTest.java
+++ b/src/test/java/org/apache/commons/collections4/map/UnmodifiableSortedMapTest.java
@@ -81,6 +81,15 @@ public class UnmodifiableSortedMapTest<K, V> extends AbstractSortedMapTest<K, V>
 
     //-----------------------------------------------------------------------
 
+    public void testHeadMap() {
+        final SortedMap<K, V> map = makeFullMap();
+        final SortedMap<K, V> m = new TreeMap<>();
+        //again is the first key of the map
+        assertSame(m.isEmpty(), map.headMap((K)"again").isEmpty());
+    }
+
+    //-----------------------------------------------------------------------
+
     @Override
     public String getCompatibilityVersion() {
         return "4";