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1   /*
2    * Licensed to the Hipparchus project under one or more
3    * contributor license agreements.  See the NOTICE file distributed with
4    * this work for additional information regarding copyright ownership.
5    * The Hipparchus project licenses this file to You under the Apache License, Version 2.0
6    * (the "License"); you may not use this file except in compliance with
7    * the License.  You may obtain a copy of the License at
8    *
9    *      https://www.apache.org/licenses/LICENSE-2.0
10   *
11   * Unless required by applicable law or agreed to in writing, software
12   * distributed under the License is distributed on an "AS IS" BASIS,
13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14   * See the License for the specific language governing permissions and
15   * limitations under the License.
16   */
17  
18  package org.hipparchus.ode.nonstiff;
19  
20  import org.junit.Test;
21  
22  public class ThreeEighthesIntegratorTest extends RungeKuttaIntegratorAbstractTest {
23  
24      protected RungeKuttaIntegrator createIntegrator(double step) {
25          return new ThreeEighthesIntegrator(step);
26      }
27  
28      @Override
29      public void testMissedEndEvent() {
30          doTestMissedEndEvent(1.0e-15, 6.0e-5);
31      }
32  
33      @Override
34      public void testSanityChecks() {
35          doTestSanityChecks();
36      }
37  
38      @Override
39      public void testDecreasingSteps() {
40          doTestDecreasingSteps(1.0, 1.0, 1.0e-10);
41      }
42  
43      @Override
44      public void testSmallStep() {
45          doTestSmallStep(2.0e-13, 4.0e-12, 1.0e-12, "3/8");
46      }
47  
48      @Override
49      public void testBigStep() {
50          doTestBigStep(0.0004, 0.005, 1.0e-12, "3/8");
51  
52      }
53  
54      @Override
55      public void testBackward() {
56          doTestBackward(5.0e-10, 7.0e-10, 1.0e-12, "3/8");
57      }
58  
59      @Override
60      public void testKepler() {
61          doTestKepler(0.0348, 1.0e-4);
62      }
63  
64      @Override
65      public void testStepSize() {
66          doTestStepSize(1.0e-12);
67      }
68  
69      @Override
70      public void testSingleStep() {
71          doTestSingleStep(0.21);
72      }
73  
74      @Override
75      public void testTooLargeFirstStep() {
76          doTestTooLargeFirstStep();
77      }
78  
79      @Override
80      public void testUnstableDerivative() {
81          doTestUnstableDerivative(1.0e-12);
82      }
83  
84      @Override
85      public void testDerivativesConsistency() {
86          doTestDerivativesConsistency(1.0e-10);
87      }
88  
89      @Override
90      public void testSerialization() {
91          doTestSerialization(1017886, 0.031);
92      }
93  
94      @Test
95      public void testSecondaryEquations() {
96          doTestSecondaryEquations(1.1e-12, 5.6e-13);
97      }
98  
99  }