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Java example source code file (AdamsBashforthFieldIntegratorTest.java)

This example Java source code file (AdamsBashforthFieldIntegratorTest.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

adams-bashforth, adamsbashforthfieldintegrator, adamsbashforthfieldintegratortest, adamsfieldintegrator, adamsfieldintegratorabstracttest, realfieldelement, test

The AdamsBashforthFieldIntegratorTest.java Java example source code

/*
 * 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.math3.ode.nonstiff;


import org.apache.commons.math3.Field;
import org.apache.commons.math3.RealFieldElement;
import org.apache.commons.math3.exception.MathIllegalStateException;
import org.apache.commons.math3.exception.MaxCountExceededException;
import org.apache.commons.math3.exception.NumberIsTooSmallException;
import org.apache.commons.math3.util.Decimal64Field;
import org.junit.Test;

public class AdamsBashforthFieldIntegratorTest extends AdamsFieldIntegratorAbstractTest {

    protected <T extends RealFieldElement AdamsFieldIntegrator
    createIntegrator(Field<T> field, final int nSteps, final double minStep, final double maxStep,
                     final double scalAbsoluteTolerance, final double scalRelativeTolerance) {
        return new AdamsBashforthFieldIntegrator<T>(field, nSteps, minStep, maxStep,
                        scalAbsoluteTolerance, scalRelativeTolerance);
    }

    protected <T extends RealFieldElement AdamsFieldIntegrator
    createIntegrator(Field<T> field, final int nSteps, final double minStep, final double maxStep,
                     final double[] vecAbsoluteTolerance, final double[] vecRelativeTolerance) {
        return new AdamsBashforthFieldIntegrator<T>(field, nSteps, minStep, maxStep,
                        vecAbsoluteTolerance, vecRelativeTolerance);
    }

    @Test(expected=NumberIsTooSmallException.class)
    public void testMinStep() {
        doDimensionCheck(Decimal64Field.getInstance());
    }

    @Test
    public void testIncreasingTolerance() {
        // the 2.6 and 122 factors are only valid for this test
        // and has been obtained from trial and error
        // there are no general relationship between local and global errors
        doTestIncreasingTolerance(Decimal64Field.getInstance(), 2.6, 122);
    }

    @Test(expected = MaxCountExceededException.class)
    public void exceedMaxEvaluations() {
        doExceedMaxEvaluations(Decimal64Field.getInstance(), 650);
    }

    @Test
    public void backward() {
        doBackward(Decimal64Field.getInstance(), 4.3e-8, 4.3e-8, 1.0e-16, "Adams-Bashforth");
    }

    @Test
    public void polynomial() {
        doPolynomial(Decimal64Field.getInstance(), 5, 0.004, 6.0e-10);
    }

    @Test(expected=MathIllegalStateException.class)
    public void testStartFailure() {
        doTestStartFailure(Decimal64Field.getInstance());
    }

}

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