1   /* Copyright 2022-2025 Romain Serra
2    * Licensed to CS GROUP (CS) under one or more
3    * contributor license agreements.  See the NOTICE file distributed with
4    * this work for additional information regarding copyright ownership.
5    * CS 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    *   http://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  package org.orekit.control.indirect.shooting.boundary;
18  
19  import org.hipparchus.geometry.euclidean.threed.Vector3D;
20  import org.junit.jupiter.api.Assertions;
21  import org.junit.jupiter.api.Test;
22  import org.orekit.utils.PVCoordinates;
23  
24  class NormBasedCartesianConditionCheckerTest {
25  
26      @Test
27      void testIsConvergedTrivial() {
28          // GIVEN
29          final int expectedMaximumCount = 10;
30          final double toleranceDistance = 0.;
31          final double toleranceSpeed = 0.;
32          final NormBasedCartesianConditionChecker convergenceChecker = new NormBasedCartesianConditionChecker(expectedMaximumCount,
33                  toleranceDistance, toleranceSpeed);
34          final PVCoordinates pvCoordinates = new PVCoordinates(Vector3D.MINUS_J, Vector3D.MINUS_K);
35          // WHEN & THEN
36          Assertions.assertFalse(convergenceChecker.isConverged(pvCoordinates, pvCoordinates));
37          Assertions.assertEquals(expectedMaximumCount, convergenceChecker.getMaximumIterationCount());
38      }
39  
40      @Test
41      void testIsConvergedPosition() {
42          // GIVEN
43          final int expectedMaximumCount = 10;
44          final double toleranceDistance = 10.;
45          final double toleranceSpeed = Double.POSITIVE_INFINITY;
46          final NormBasedCartesianConditionChecker convergenceChecker = new NormBasedCartesianConditionChecker(expectedMaximumCount,
47                  toleranceDistance, toleranceSpeed);
48          final PVCoordinates pvCoordinates = new PVCoordinates(Vector3D.MINUS_J.scalarMultiply(5.), Vector3D.ZERO);
49          // WHEN & THEN
50          Assertions.assertTrue(convergenceChecker.isConverged(pvCoordinates, new PVCoordinates()));
51      }
52  
53      @Test
54      void testIsConvergedVelocity() {
55          // GIVEN
56          final int expectedMaximumCount = 10;
57          final double toleranceDistance = 10.;
58          final double toleranceSpeed = 1.;
59          final NormBasedCartesianConditionChecker convergenceChecker = new NormBasedCartesianConditionChecker(expectedMaximumCount,
60                  toleranceDistance, toleranceSpeed);
61          final PVCoordinates pvCoordinates = new PVCoordinates(Vector3D.ZERO, Vector3D.PLUS_I.scalarMultiply(2.));
62          // WHEN & THEN
63          Assertions.assertFalse(convergenceChecker.isConverged(pvCoordinates, new PVCoordinates()));
64      }
65  }