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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.jupiter.api.Test;
21  
22  class LutherIntegratorTest extends RungeKuttaIntegratorAbstractTest {
23  
24      protected FixedStepRungeKuttaIntegrator createIntegrator(double step) {
25          return new LutherIntegrator(step);
26      }
27  
28      @Override
29      @Test
30      public void testMissedEndEvent() {
31          doTestMissedEndEvent(1.0e-15, 1.0e-15);
32      }
33  
34      @Override
35      @Test
36      public void testSanityChecks() {
37          doTestSanityChecks();
38      }
39  
40      @Override
41      @Test
42      public void testDecreasingSteps() {
43          doTestDecreasingSteps(3.6, 1.0, 1.0e-10);
44      }
45  
46      @Override
47      @Test
48      public void testSmallStep() {
49          doTestSmallStep(8.7e-17, 3.6e-15, 1.0e-12, "Luther");
50      }
51  
52      @Override
53      @Test
54      public void testBigStep() {
55          doTestBigStep(2.7e-5, 1.7e-3, 1.0e-12, "Luther");
56      }
57  
58      @Override
59      @Test
60      public void testBackward() {
61          doTestBackward(2.4e-13, 4.3e-13, 1.0e-12, "Luther");
62      }
63  
64      @Override
65      @Test
66      public void testKepler() {
67          doTestKepler(2.18e-7, 4.0e-10);
68      }
69  
70      @Override
71      @Test
72      public void testStepSize() {
73          doTestStepSize(1.0e-22);
74      }
75  
76      @Override
77      @Test
78      public void testSingleStep() {
79          doTestSingleStep(6.0e-12);
80      }
81  
82      @Override
83      @Test
84      public void testTooLargeFirstStep() {
85          doTestTooLargeFirstStep();
86      }
87  
88      @Override
89      @Test
90      public void testUnstableDerivative() {
91          doTestUnstableDerivative(4.0e-15);
92      }
93  
94      @Override
95      @Test
96      public void testDerivativesConsistency() {
97          doTestDerivativesConsistency(1.0e-20);
98      }
99  
100     @Override
101     @Test
102     public void testSerialization() {
103         doTestSerialization(1437963, 2.18e-7);
104     }
105 
106     @Test
107     public void testSecondaryEquations() {
108         doTestSecondaryEquations(1.0e-12, 5.6e-13);
109     }
110 
111 }