Migrate media item transition tests to TestExoPlayer

PiperOrigin-RevId: 396313679

testutils/src/main/java/com/google/android/exoplayer2/testutil/ExoPlayerTestRunner.java

@@ -555,27 +555,6 @@ public final class ExoPlayerTestRunner implements Player.Listener, ActionSchedul
   }
 
   /**
-   * Asserts that the media items reported by {@link
-   * Player.Listener#onMediaItemTransition(MediaItem, int)} are the same as the provided media
-   * items.
-   *
-   * @param mediaItems A list of expected {@link MediaItem media items}.
-   */
-  public void assertMediaItemsTransitionedSame(MediaItem... mediaItems) {
-    assertThat(this.mediaItems).containsExactlyElementsIn(mediaItems).inOrder();
-  }
-
-  /**
-   * Asserts that the media item transition reasons reported by {@link
-   * Player.Listener#onMediaItemTransition(MediaItem, int)} are the same as the provided reasons.
-   *
-   * @param reasons A list of expected transition reasons.
-   */
-  public void assertMediaItemsTransitionReasonsEqual(Integer... reasons) {
-    assertThat(this.mediaItemTransitionReasons).containsExactlyElementsIn(reasons).inOrder();
-  }
-
-  /**
    * Asserts that the playback states reported by {@link
    * Player.Listener#onPlaybackStateChanged(int)} are equal to the provided playback states.
    */

testutils/src/main/java/com/google/android/exoplayer2/testutil/FakeMediaSource.java

@@ -73,6 +73,13 @@ public class FakeMediaSource extends BaseMediaSource {
     }
   }
 
+  /** Convenience method to create a {@link FakeMediaSource} with the given window id. */
+  public static FakeMediaSource createWithWindowId(Object windowId) {
+    return new FakeMediaSource(
+        new FakeTimeline(
+            new FakeTimeline.TimelineWindowDefinition(/* periodCount= */ 1, windowId)));
+  }
+
   /** The media item used by the fake media source. */
   public static final MediaItem FAKE_MEDIA_ITEM =
       new MediaItem.Builder().setMediaId("FakeMediaSource").setUri("http://manifest.uri").build();

testutils/src/main/java/com/google/android/exoplayer2/testutil/TestUtil.java

@@ -26,6 +26,7 @@ import android.graphics.Color;
 import android.media.MediaCodec;
 import android.net.Uri;
 import com.google.android.exoplayer2.C;
+import com.google.android.exoplayer2.Timeline;
 import com.google.android.exoplayer2.database.DatabaseProvider;
 import com.google.android.exoplayer2.database.DefaultDatabaseProvider;
 import com.google.android.exoplayer2.extractor.DefaultExtractorInput;
@@ -45,6 +46,7 @@ import java.io.FileOutputStream;
 import java.io.IOException;
 import java.io.InputStream;
 import java.nio.ByteBuffer;
+import java.util.List;
 import java.util.Random;
 
 /** Utility methods for tests. */
@@ -184,6 +186,23 @@ public class TestUtil {
   }
 
   /**
+   * Asserts that the actual timelines are the same to the expected timelines. This assert differs
+   * from testing equality by not comparing period ids which may be different due to id mapping of
+   * child source period ids.
+   *
+   * @param actualTimelines A list of actual {@link Timeline timelines}.
+   * @param expectedTimelines A list of expected {@link Timeline timelines}.
+   */
+  public static void assertTimelinesSame(
+      List<Timeline> actualTimelines, List<Timeline> expectedTimelines) {
+    assertThat(actualTimelines).hasSize(expectedTimelines.size());
+    for (int i = 0; i < actualTimelines.size(); i++) {
+      assertThat(new NoUidTimeline(actualTimelines.get(i)))
+          .isEqualTo(new NoUidTimeline(expectedTimelines.get(i)));
+    }
+  }
+
+  /**
    * Asserts that data read from a {@link DataSource} matches {@code expected}.
    *
    * @param dataSource The {@link DataSource} through which to read.