content: /*
   * Copyright (C) 2021 The Android Open Source Project
   *
   * Licensed 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 com.google.android.exoplayer2.trackselection;
  
  import static com.google.common.truth.Truth.assertThat;
  import static org.junit.Assert.assertThrows;
  
  import androidx.test.ext.junit.runners.AndroidJUnit4;
  import com.google.android.exoplayer2.Format;
  import com.google.android.exoplayer2.source.TrackGroup;
  import com.google.common.collect.ImmutableList;
  import java.util.Arrays;
  import org.junit.Test;
  import org.junit.runner.RunWith;
  
  /** Unit tests for {@link TrackSelectionOverride}. */
  @RunWith(AndroidJUnit4.class)
  public final class TrackSelectionOverrideTest {
  
    @Test
    public void newTrackSelectionOverride_withOneTrack_selectsOneTrack() {
      TrackSelectionOverride trackSelectionOverride =
          new TrackSelectionOverride(newTrackGroupWithIds(1, 2), /* trackIndex= */ 1);
  
      assertThat(trackSelectionOverride.mediaTrackGroup).isEqualTo(newTrackGroupWithIds(1, 2));
      assertThat(trackSelectionOverride.trackIndices).containsExactly(1).inOrder();
    }
  
    @Test
    public void newTrackSelectionOverride_withTracks_selectsOnlySpecifiedTracks() {
      TrackSelectionOverride trackSelectionOverride =
          new TrackSelectionOverride(newTrackGroupWithIds(1, 2), ImmutableList.of(1));
  
      assertThat(trackSelectionOverride.mediaTrackGroup).isEqualTo(newTrackGroupWithIds(1, 2));
      assertThat(trackSelectionOverride.trackIndices).containsExactly(1);
    }
  
    @Test
    public void newTrackSelectionOverride_with0Tracks_selectsAllSpecifiedTracks() {
      TrackSelectionOverride trackSelectionOverride =
          new TrackSelectionOverride(newTrackGroupWithIds(1, 2), ImmutableList.of());
  
      assertThat(trackSelectionOverride.mediaTrackGroup).isEqualTo(newTrackGroupWithIds(1, 2));
      assertThat(trackSelectionOverride.trackIndices).isEmpty();
    }
  
    @Test
    public void newTrackSelectionOverride_withInvalidIndex_throws() {
      assertThrows(
          IndexOutOfBoundsException.class,
          () -> new TrackSelectionOverride(newTrackGroupWithIds(1, 2), ImmutableList.of(2)));
    }
  
    private static TrackGroup newTrackGroupWithIds(int... ids) {
      return new TrackGroup(
          Arrays.stream(ids)
              .mapToObj(id -> new Format.Builder().setId(id).build())
              .toArray(Format[]::new));
    }
  }
  