/* 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;
  
  import org.hipparchus.linear.MatrixUtils;
  import org.hipparchus.linear.RealMatrix;
  import org.junit.jupiter.api.Test;
  import org.mockito.Mockito;
  
  import static org.junit.jupiter.api.Assertions.*;
  import static org.mockito.Mockito.mock;
  import static org.mockito.Mockito.when;
  
  class AbstractMatricesHarvesterTest {
  
      @Test
      void testToArray() {
          // GIVEN
          final int stateDimension = 7;
          final AbstractMatricesHarvester moockedHarvester = mock();
          when(moockedHarvester.toArray(Mockito.any())).thenCallRealMethod();
          when(moockedHarvester.toSquareMatrix(Mockito.any())).thenCallRealMethod();
          when(moockedHarvester.getStateDimension()).thenReturn(stateDimension);
          final RealMatrix expectedMatrix = MatrixUtils.createRealIdentityMatrix(stateDimension);
          expectedMatrix.setEntry(0, 2, 42);
          expectedMatrix.setEntry(1, 2, 42);
          expectedMatrix.setEntry(4, 3, 42);
          // WHEN
          final double[] array = moockedHarvester.toArray(expectedMatrix.getData());
          final RealMatrix actualMatrix = moockedHarvester.toSquareMatrix(array);
          // THEN
          assertEquals(0., actualMatrix.subtract(expectedMatrix).getNorm1());
      }
  }