| /* |
| * 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.sampling; |
| |
| |
| import java.io.ByteArrayInputStream; |
| import java.io.ByteArrayOutputStream; |
| import java.io.IOException; |
| import java.io.ObjectInputStream; |
| import java.io.ObjectOutputStream; |
| |
| import org.apache.commons.math3.exception.MaxCountExceededException; |
| import org.apache.commons.math3.util.FastMath; |
| import org.junit.Assert; |
| import org.junit.Test; |
| |
| public class DummyStepInterpolatorTest { |
| |
| @Test |
| public void testNoReset() throws MaxCountExceededException { |
| |
| double[] y = { 0.0, 1.0, -2.0 }; |
| DummyStepInterpolator interpolator = new DummyStepInterpolator(y, new double[y.length], true); |
| interpolator.storeTime(0); |
| interpolator.shift(); |
| interpolator.storeTime(1); |
| |
| double[] result = interpolator.getInterpolatedState(); |
| for (int i = 0; i < result.length; ++i) { |
| Assert.assertTrue(FastMath.abs(result[i] - y[i]) < 1.0e-10); |
| } |
| |
| } |
| |
| @Test |
| public void testFixedState() throws MaxCountExceededException { |
| |
| double[] y = { 1.0, 3.0, -4.0 }; |
| DummyStepInterpolator interpolator = new DummyStepInterpolator(y, new double[y.length], true); |
| interpolator.storeTime(0); |
| interpolator.shift(); |
| interpolator.storeTime(1); |
| |
| interpolator.setInterpolatedTime(0.1); |
| double[] result = interpolator.getInterpolatedState(); |
| for (int i = 0; i < result.length; ++i) { |
| Assert.assertTrue(FastMath.abs(result[i] - y[i]) < 1.0e-10); |
| } |
| |
| interpolator.setInterpolatedTime(0.5); |
| result = interpolator.getInterpolatedState(); |
| for (int i = 0; i < result.length; ++i) { |
| Assert.assertTrue(FastMath.abs(result[i] - y[i]) < 1.0e-10); |
| } |
| |
| } |
| |
| @Test |
| public void testSerialization() |
| throws IOException, ClassNotFoundException, MaxCountExceededException { |
| |
| double[] y = { 0.0, 1.0, -2.0 }; |
| DummyStepInterpolator interpolator = new DummyStepInterpolator(y, new double[y.length], true); |
| interpolator.storeTime(0); |
| interpolator.shift(); |
| interpolator.storeTime(1); |
| |
| ByteArrayOutputStream bos = new ByteArrayOutputStream(); |
| ObjectOutputStream oos = new ObjectOutputStream(bos); |
| oos.writeObject(interpolator); |
| |
| Assert.assertTrue(bos.size () > 300); |
| Assert.assertTrue(bos.size () < 500); |
| |
| ByteArrayInputStream bis = new ByteArrayInputStream(bos.toByteArray()); |
| ObjectInputStream ois = new ObjectInputStream(bis); |
| DummyStepInterpolator dsi = (DummyStepInterpolator) ois.readObject(); |
| |
| dsi.setInterpolatedTime(0.5); |
| double[] result = dsi.getInterpolatedState(); |
| for (int i = 0; i < result.length; ++i) { |
| Assert.assertTrue(FastMath.abs(result[i] - y[i]) < 1.0e-10); |
| } |
| |
| } |
| |
| @Test |
| public void testImpossibleSerialization() |
| throws IOException { |
| |
| double[] y = { 0.0, 1.0, -2.0 }; |
| AbstractStepInterpolator interpolator = new BadStepInterpolator(y, true); |
| interpolator.storeTime(0); |
| interpolator.shift(); |
| interpolator.storeTime(1); |
| |
| ByteArrayOutputStream bos = new ByteArrayOutputStream(); |
| ObjectOutputStream oos = new ObjectOutputStream(bos); |
| try { |
| oos.writeObject(interpolator); |
| Assert.fail("an exception should have been thrown"); |
| } catch (LocalException le) { |
| // expected behavior |
| } |
| } |
| |
| private static class BadStepInterpolator extends DummyStepInterpolator { |
| public BadStepInterpolator(double[] y, boolean forward) { |
| super(y, new double[y.length], forward); |
| } |
| @Override |
| protected void doFinalize() { |
| throw new LocalException(); |
| } |
| } |
| |
| private static class LocalException extends RuntimeException { |
| private static final long serialVersionUID = 1L; |
| } |
| |
| } |