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Added tests for derivatives consistency.

This commit is contained in:
Luc Maisonobe 2016-01-06 12:41:06 +01:00
parent a961a2ec9c
commit de90332490
4 changed files with 62 additions and 41 deletions
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11
src/test/java/org/apache/commons/math4/ode/nonstiff/AbstractRungeKuttaFieldIntegratorTest.java
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@ -42,6 +42,7 @@ import org.apache.commons.math4.ode.events.Action;
import org.apache.commons.math4.ode.events.FieldEventHandler;
import org.apache.commons.math4.ode.sampling.FieldStepHandler;
import org.apache.commons.math4.ode.sampling.FieldStepInterpolator;
import org.apache.commons.math4.ode.sampling.StepInterpolatorTestUtils;
import org.apache.commons.math4.util.FastMath;
import org.apache.commons.math4.util.MathArrays;
import org.junit.Assert;
@ -507,4 +508,14 @@ public abstract class AbstractRungeKuttaFieldIntegratorTest {
Assert.assertEquals(8.0, result.getState()[0].getReal(), epsilon);
}
@Test
public abstract void testDerivativesConsistency();
protected <T extends RealFieldElement<T>> void doTestDerivativesConsistency(final Field<T> field, double epsilon) {
TestFieldProblem3<T> pb = new TestFieldProblem3<T>(field);
T step = pb.getFinalTime().subtract(pb.getInitialState().getTime()).multiply(0.001);
RungeKuttaFieldIntegrator<T> integ = createIntegrator(field, step);
StepInterpolatorTestUtils.checkDerivativesConsistency(integ, pb, 1.0e-10);
}
}

5
src/test/java/org/apache/commons/math4/ode/nonstiff/ClassicalRungeKuttaFieldIntegratorTest.java
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@ -91,4 +91,9 @@ public class ClassicalRungeKuttaFieldIntegratorTest extends AbstractRungeKuttaFi
doTestUnstableDerivative(Decimal64Field.getInstance(), 1.0e-12);
}
@Test
public void testDerivativesConsistency() {
doTestDerivativesConsistency(Decimal64Field.getInstance(), 1.0e-10);
}
}

5
src/test/java/org/apache/commons/math4/ode/nonstiff/EulerFieldIntegratorTest.java
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@ -92,4 +92,9 @@ public class EulerFieldIntegratorTest extends AbstractRungeKuttaFieldIntegratorT
doTestUnstableDerivative(Decimal64Field.getInstance(), 1.0e-12);
}
@Test
public void testDerivativesConsistency() {
doTestDerivativesConsistency(Decimal64Field.getInstance(), 1.0e-10);
}
}

10
src/test/java/org/apache/commons/math4/ode/nonstiff/GillFieldIntegratorTest.java
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@ -20,12 +20,7 @@ package org.apache.commons.math4.ode.nonstiff;
import org.apache.commons.math4.Field;
import org.apache.commons.math4.RealFieldElement;
import org.apache.commons.math4.ode.FieldExpandableODE;
import org.apache.commons.math4.ode.FieldODEState;
import org.apache.commons.math4.ode.FieldODEStateAndDerivative;
import org.apache.commons.math4.util.Decimal64Field;
import org.apache.commons.math4.util.MathArrays;
import org.junit.Assert;
import org.junit.Test;
public class GillFieldIntegratorTest extends AbstractRungeKuttaFieldIntegratorTest {
@ -96,4 +91,9 @@ public class GillFieldIntegratorTest extends AbstractRungeKuttaFieldIntegratorTe
doTestUnstableDerivative(Decimal64Field.getInstance(), 1.0e-12);
}
@Test
public void testDerivativesConsistency() {
doTestDerivativesConsistency(Decimal64Field.getInstance(), 1.0e-10);
}
}