View Javadoc
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  
21  import org.hipparchus.CalculusFieldElement;
22  import org.hipparchus.Field;
23  import org.hipparchus.util.Binary64Field;
24  import org.junit.Test;
25  
26  public class ThreeEighthesFieldIntegratorTest extends RungeKuttaFieldIntegratorAbstractTest {
27  
28      protected <T extends CalculusFieldElement<T>> RungeKuttaFieldIntegrator<T>
29      createIntegrator(Field<T> field, T step) {
30          return new ThreeEighthesFieldIntegrator<T>(field, step);
31      }
32  
33      @Override
34      public void testNonFieldIntegratorConsistency() {
35          doTestNonFieldIntegratorConsistency(Binary64Field.getInstance());
36      }
37  
38      @Override
39      public void testMissedEndEvent() {
40          doTestMissedEndEvent(Binary64Field.getInstance(), 1.0e-15, 6.0e-5);
41      }
42  
43      @Override
44      public void testSanityChecks() {
45          doTestSanityChecks(Binary64Field.getInstance());
46      }
47  
48      @Override
49      public void testDecreasingSteps() {
50          doTestDecreasingSteps(Binary64Field.getInstance(), 1.0, 1.0, 1.0e-10);
51      }
52  
53      @Override
54      public void testSmallStep() {
55          doTestSmallStep(Binary64Field.getInstance(), 2.0e-13, 4.0e-12, 1.0e-12, "3/8");
56      }
57  
58      @Override
59      public void testBigStep() {
60          doTestBigStep(Binary64Field.getInstance(), 0.0004, 0.005, 1.0e-12, "3/8");
61  
62      }
63  
64      @Override
65      public void testBackward() {
66          doTestBackward(Binary64Field.getInstance(), 5.0e-10, 7.0e-10, 1.0e-12, "3/8");
67      }
68  
69      @Override
70      public void testKepler() {
71          doTestKepler(Binary64Field.getInstance(), 0.0348, 1.0e-4);
72      }
73  
74      @Override
75      public void testStepSize() {
76          doTestStepSize(Binary64Field.getInstance(), 1.0e-12);
77      }
78  
79      @Override
80      public void testSingleStep() {
81          doTestSingleStep(Binary64Field.getInstance(), 0.21);
82      }
83  
84      @Override
85      public void testTooLargeFirstStep() {
86          doTestTooLargeFirstStep(Binary64Field.getInstance());
87      }
88  
89      @Override
90      public void testUnstableDerivative() {
91          doTestUnstableDerivative(Binary64Field.getInstance(), 1.0e-12);
92      }
93  
94      @Override
95      public void testDerivativesConsistency() {
96          doTestDerivativesConsistency(Binary64Field.getInstance(), 1.0e-10);
97      }
98  
99      @Override
100     public void testPartialDerivatives() {
101         doTestPartialDerivatives(3.2e-10, new double[] { 2.1e-9, 5.9e-10, 7.0e-11, 5.9e-10, 5.9e-10 });
102     }
103 
104     @Test
105     public void testSecondaryEquations() {
106         doTestSecondaryEquations(Binary64Field.getInstance(), 1.1e-12, 5.6e-13);
107     }
108 
109 }