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.forces.maneuvers;
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.TestUtils;
23  import org.orekit.orbits.Orbit;
24  import org.orekit.propagation.SpacecraftState;
25  import org.orekit.time.AbsoluteDate;
26  
27  class ImpulseProviderTest {
28  
29      @Test
30      void testOf() {
31          // GIVEN
32          final Vector3D forwardImpulse = new Vector3D(1, 2, 3);
33          final Orbit orbit = TestUtils.getDefaultOrbit(AbsoluteDate.ARBITRARY_EPOCH);
34          final SpacecraftState state = new SpacecraftState(orbit, 100);
35          // WHEN
36          final ImpulseProvider provider = ImpulseProvider.of(forwardImpulse);
37          final Vector3D vector3D = provider.getImpulse(state, true);
38          // THEN
39          Assertions.assertEquals(forwardImpulse, vector3D);
40          Assertions.assertEquals(forwardImpulse.negate(), provider.getImpulse(state, false));
41      }
42  }