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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.interpolators;
19  
20  
21  import org.hipparchus.ode.EquationsMapper;
22  import org.hipparchus.ode.ODEStateAndDerivative;
23  import org.hipparchus.ode.nonstiff.ButcherArrayProvider;
24  import org.hipparchus.ode.nonstiff.ClassicalRungeKuttaIntegrator;
25  import org.junit.jupiter.api.Test;
26  
27  class ClassicalRungeKuttaStateInterpolatorTest extends RungeKuttaStateInterpolatorAbstractTest {
28  
29      @Override
30      protected RungeKuttaStateInterpolator
31          createInterpolator(boolean forward, double[][] yDotK,
32                             ODEStateAndDerivative globalPreviousState,
33                             ODEStateAndDerivative globalCurrentState,
34                             ODEStateAndDerivative softPreviousState,
35                             ODEStateAndDerivative softCurrentState,
36                             EquationsMapper mapper) {
37          return new ClassicalRungeKuttaStateInterpolator(forward, yDotK,
38                                                         globalPreviousState, globalCurrentState,
39                                                         softPreviousState, softCurrentState,
40                                                         mapper);
41      }
42  
43      @Override
44      protected ButcherArrayProvider createButcherArrayProvider() {
45          return new ClassicalRungeKuttaIntegrator(1.0);
46      }
47  
48      @Test
49      public void interpolationAtBounds() {
50          doInterpolationAtBounds(1.0e-15);
51      }
52  
53      @Test
54      public void interpolationInside() {
55          doInterpolationInside(2.6e-7, 3.6e-6);
56      }
57  
58      @Override
59      @Test
60      public void restrictPrevious() {
61          doRestrictPrevious(1.0e-15, 1.0e-15);
62      }
63  
64      @Override
65      @Test
66      public void restrictCurrent() {
67          doRestrictCurrent(1.0e-15, 1.0e-15);
68      }
69  
70      @Override
71      @Test
72      public void restrictBothEnds() {
73          doRestrictBothEnds(1.0e-15, 1.0e-15);
74      }
75  
76      @Override
77      @Test
78      public void degenerateInterpolation() {
79          doDegenerateInterpolation();
80      }
81  
82  }