/* Copyright 2022-2025 Romain Serra
    * Licensed to CS GROUP (CS) under one or more
    * contributor license agreements.  See the NOTICE file distributed with
    * this work for additional information regarding copyright ownership.
    * CS licenses this file to You under the Apache License, Version 2.0
    * (the "License"); you may not use this file except in compliance with
    * the License.  You may obtain a copy of the License at
    *
    *   http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package org.orekit.propagation.sampling;
  
  import org.junit.jupiter.api.Test;
  import org.mockito.Mockito;
  import org.orekit.propagation.SpacecraftState;
  import org.orekit.time.AbsoluteDate;
  
  import java.util.List;
  
  import static org.junit.jupiter.api.Assertions.*;
  
  class PropagationStepRecorderTest {
  
      @Test
      void copyStatesAtConstructionTest() {
          // GIVEN
          final PropagationStepRecorder recorder = new PropagationStepRecorder();
          // WHEN
          final List<SpacecraftState> states = recorder.copyStates();
          // THEN
          assertEquals(0, states.size());
      }
  
      @Test
      void copyStatesTest() {
          // GIVEN
          final PropagationStepRecorder recorder = new PropagationStepRecorder();
          recorder.handleStep(mockInterpolator());
          // WHEN
          recorder.init(mockState(), AbsoluteDate.ARBITRARY_EPOCH);
          // THEN
          final List<SpacecraftState> states = recorder.copyStates();
          assertEquals(0, states.size());
      }
  
      @Test
      void handleStepTest() {
          // GIVEN
          final PropagationStepRecorder recorder = new PropagationStepRecorder();
          final OrekitStepInterpolator mockedInterpolator = mockInterpolator();
          final int expectedSize = 10;
          // WHEN
          for (int i = 0; i < expectedSize; ++i) {
              recorder.handleStep(mockedInterpolator);
          }
          // WHEN
          final List<SpacecraftState> states = recorder.copyStates();
          assertEquals(expectedSize, states.size());
      }
  
      private static OrekitStepInterpolator mockInterpolator() {
          final SpacecraftState state = mockState();
          final OrekitStepInterpolator mockedInterpolator = Mockito.mock();
          Mockito.when(mockedInterpolator.getCurrentState()).thenReturn(state);
          return mockedInterpolator;
      }
  
      private static SpacecraftState mockState() {
          return Mockito.mock(SpacecraftState.class);
      }
  }