Add test for PlaybackException

PiperOrigin-RevId: 373026239

library/common/src/test/java/com/google/android/exoplayer2/PlaybackExceptionTest.java

@@ -0,0 +1,49 @@
+/*
+ * Copyright 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;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+import java.io.IOException;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+/** Unit tests for {@link PlaybackException}. */
+@RunWith(AndroidJUnit4.class)
+public class PlaybackExceptionTest {
+
+  @Test
+  public void roundTripViaBundle_yieldsEqualInstance() {
+    PlaybackException before =
+        new PlaybackException(
+            /* message= */ "test",
+            /* cause= */ new IOException(/* message= */ "io"),
+            PlaybackException.ERROR_CODE_IO_FILE_NOT_FOUND);
+    PlaybackException after = PlaybackException.CREATOR.fromBundle(before.toBundle());
+    assertPlaybackExceptionsAreEqual(before, after);
+  }
+
+  // TODO: Add test for backwards compatibility.
+
+  private static void assertPlaybackExceptionsAreEqual(PlaybackException a, PlaybackException b) {
+    assertThat(a.getMessage()).isEqualTo(b.getMessage());
+    assertThat(a.errorCode).isEqualTo(b.errorCode);
+    assertThat(a.timestampMs).isEqualTo(b.timestampMs);
+    assertThat(a.getCause().getClass()).isSameInstanceAs(b.getCause().getClass());
+    assertThat(a.getCause().getMessage()).isEqualTo(b.getCause().getMessage());
+  }
+}