[02/50] [abbrv] [math] Added tests for midpoint integrator.

[lu...@apache.org]

Added tests for midpoint integrator.


Project: http://git-wip-us.apache.org/repos/asf/commons-math/repo
Commit: http://git-wip-us.apache.org/repos/asf/commons-math/commit/34f1f6a4
Tree: http://git-wip-us.apache.org/repos/asf/commons-math/tree/34f1f6a4
Diff: http://git-wip-us.apache.org/repos/asf/commons-math/diff/34f1f6a4

Branch: refs/heads/master
Commit: 34f1f6a485cf3dbe9270cbf0232cab986ba13cd2
Parents: de90332
Author: Luc Maisonobe <lu...@apache.org>
Authored: Wed Jan 6 12:41:07 2016 +0100
Committer: Luc Maisonobe <lu...@apache.org>
Committed: Wed Jan 6 12:41:07 2016 +0100

----------------------------------------------------------------------
 .../nonstiff/MidpointFieldIntegratorTest.java   | 99 ++++++++++++++++++++
 1 file changed, 99 insertions(+)
----------------------------------------------------------------------


http://git-wip-us.apache.org/repos/asf/commons-math/blob/34f1f6a4/src/test/java/org/apache/commons/math4/ode/nonstiff/MidpointFieldIntegratorTest.java
----------------------------------------------------------------------
diff --git a/src/test/java/org/apache/commons/math4/ode/nonstiff/MidpointFieldIntegratorTest.java b/src/test/java/org/apache/commons/math4/ode/nonstiff/MidpointFieldIntegratorTest.java
new file mode 100644
index 0000000..cc8eb8d
--- /dev/null
+++ b/src/test/java/org/apache/commons/math4/ode/nonstiff/MidpointFieldIntegratorTest.java
@@ -0,0 +1,99 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.commons.math4.ode.nonstiff;
+
+
+import org.apache.commons.math4.Field;
+import org.apache.commons.math4.RealFieldElement;
+import org.apache.commons.math4.util.Decimal64Field;
+import org.junit.Test;
+
+public class MidpointFieldIntegratorTest extends AbstractRungeKuttaFieldIntegratorTest {
+
+    protected <T extends RealFieldElement<T>> RungeKuttaFieldIntegrator<T>
+    createIntegrator(Field<T> field, T step) {
+        return new MidpointFieldIntegrator<T>(field, step);
+    }
+
+    @Test
+    public void testNonFieldIntegratorConsistency() {
+        doTestNonFieldIntegratorConsistency(Decimal64Field.getInstance());
+    }
+
+    @Test
+    public void testMissedEndEvent() {
+        doTestMissedEndEvent(Decimal64Field.getInstance(), 1.0e-15, 6.0e-5);
+    }
+
+    @Test
+    public void testSanityChecks() {
+        doTestSanityChecks(Decimal64Field.getInstance());
+    }
+
+    @Test
+    public void testDecreasingSteps() {
+        doTestDecreasingSteps(Decimal64Field.getInstance(), 1.0, 1.0, 1.0e-10);
+    }
+
+    @Test
+    public void testSmallStep() {
+        doTestSmallStep(Decimal64Field.getInstance(), 2.0e-7, 1.0e-6, 1.0e-12, "midpoint");
+    }
+
+    @Test
+    public void testBigStep() {
+        doTestBigStep(Decimal64Field.getInstance(), 0.01, 0.05, 1.0e-12, "midpoint");
+
+    }
+
+    @Test
+    public void testBackward() {
+        doTestBackward(Decimal64Field.getInstance(), 6.0e-4, 6.0e-4, 1.0e-12, "midpoint");
+    }
+
+    @Test
+    public void testKepler() {
+        doTestKepler(Decimal64Field.getInstance(), 1.19, 0.01);
+    }
+
+    @Test
+    public void testStepSize() {
+        doTestStepSize(Decimal64Field.getInstance(), 1.0e-12);
+    }
+
+    @Test
+    public void testSingleStep() {
+        doTestSingleStep(Decimal64Field.getInstance(), 0.21);
+    }
+
+    @Test
+    public void testTooLargeFirstStep() {
+        doTestTooLargeFirstStep(Decimal64Field.getInstance());
+    }
+
+    @Test
+    public void testUnstableDerivative() {
+        doTestUnstableDerivative(Decimal64Field.getInstance(), 1.0e-12);
+    }
+
+    @Test
+    public void testDerivativesConsistency() {
+        doTestDerivativesConsistency(Decimal64Field.getInstance(), 1.0e-10);
+    }
+
+}