Back to Repositories

Validating Timeline Management Implementation in SmartTube

This test suite validates the Timeline functionality in ExoPlayer, focusing on media playback sequencing and window management. It ensures proper handling of both empty and populated timelines with various repeat mode configurations.

Test Coverage Overview

The test suite provides comprehensive coverage of Timeline behaviors in ExoPlayer:

Empty timeline validation
Single-period timeline functionality
Multi-period timeline operations
Window indices handling across different repeat modes
Period count verification

Implementation Analysis

The testing approach utilizes JUnit with AndroidJUnit4 runner for Android-specific timeline testing. It employs FakeTimeline implementations and custom TimelineAsserts for verification, following a systematic pattern of testing window tags, period counts, and navigation indices.

Technical Details

Testing tools and configuration:

JUnit test framework with AndroidJUnit4 runner
FakeTimeline utility for timeline simulation
TimelineAsserts for specialized timeline assertions
Custom TimelineWindowDefinition for test scenarios

Best Practices Demonstrated

The test suite exemplifies several testing best practices:

Isolated test cases for specific timeline scenarios
Comprehensive state verification
Clear test method naming
Usage of specialized assertion utilities
Proper test organization with focused test methods

yuliskov/smarttube

exoplayer-amzn-2.10.6/library/core/src/test/java/com/google/android/exoplayer2/TimelineTest.java

            
/*
 * Copyright (C) 2017 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 androidx.test.ext.junit.runners.AndroidJUnit4;
import com.google.android.exoplayer2.testutil.FakeTimeline;
import com.google.android.exoplayer2.testutil.FakeTimeline.TimelineWindowDefinition;
import com.google.android.exoplayer2.testutil.TimelineAsserts;
import org.junit.Test;
import org.junit.runner.RunWith;

/** Unit test for {@link Timeline}. */
@RunWith(AndroidJUnit4.class)
public class TimelineTest {

  @Test
  public void testEmptyTimeline() {
    TimelineAsserts.assertEmpty(Timeline.EMPTY);
  }

  @Test
  public void testSinglePeriodTimeline() {
    Timeline timeline = new FakeTimeline(new TimelineWindowDefinition(1, 111));
    TimelineAsserts.assertWindowTags(timeline, 111);
    TimelineAsserts.assertPeriodCounts(timeline, 1);
    TimelineAsserts.assertPreviousWindowIndices(
        timeline, Player.REPEAT_MODE_OFF, false, C.INDEX_UNSET);
    TimelineAsserts.assertPreviousWindowIndices(timeline, Player.REPEAT_MODE_ONE, false, 0);
    TimelineAsserts.assertPreviousWindowIndices(timeline, Player.REPEAT_MODE_ALL, false, 0);
    TimelineAsserts.assertNextWindowIndices(timeline, Player.REPEAT_MODE_OFF, false, C.INDEX_UNSET);
    TimelineAsserts.assertNextWindowIndices(timeline, Player.REPEAT_MODE_ONE, false, 0);
    TimelineAsserts.assertNextWindowIndices(timeline, Player.REPEAT_MODE_ALL, false, 0);
  }

  @Test
  public void testMultiPeriodTimeline() {
    Timeline timeline = new FakeTimeline(new TimelineWindowDefinition(5, 111));
    TimelineAsserts.assertWindowTags(timeline, 111);
    TimelineAsserts.assertPeriodCounts(timeline, 5);
    TimelineAsserts.assertPreviousWindowIndices(
        timeline, Player.REPEAT_MODE_OFF, false, C.INDEX_UNSET);
    TimelineAsserts.assertPreviousWindowIndices(timeline, Player.REPEAT_MODE_ONE, false, 0);
    TimelineAsserts.assertPreviousWindowIndices(timeline, Player.REPEAT_MODE_ALL, false, 0);
    TimelineAsserts.assertNextWindowIndices(timeline, Player.REPEAT_MODE_OFF, false, C.INDEX_UNSET);
    TimelineAsserts.assertNextWindowIndices(timeline, Player.REPEAT_MODE_ONE, false, 0);
    TimelineAsserts.assertNextWindowIndices(timeline, Player.REPEAT_MODE_ALL, false, 0);
  }
}