Media manager unit test: switch back to main content

[sebastianpiq]

No description provided.

[gemini-code-assist]

Summary of Changes

Hello @sebastianpiq, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request refines the alternative content playback mechanism by streamlining the MediaManager's interaction with alternative video elements. It shifts the responsibility of DOM manipulation away from the core manager, making the process more robust and testable. The changes are supported by updates to a sample page, minor manifest adjustments, and the introduction of extensive unit tests to ensure the reliability of the alternative content switching logic.

Highlights

• Alternative Video Element Handling: The MediaManager has been refactored to simplify how alternative video elements are managed. Direct DOM manipulation for displaying the alternative video has been removed, relying instead on a pre-configured alternative video element.
• Sample Page Updates: The samples/alternative/index.html file has been updated to correctly initialize and hide an alternative video element using specific IDs, aligning with the MediaManager changes.
• Improved Logging and Debugging: The MediaManager and AlternativeMediaController now consistently integrate the Debug module for logging, and a console.log statement was removed from MediaPlayer.js.
• Enhanced Video Model Mock: The VideoModelMock used in tests now includes an isPlaying() method and updates its internal isplaying state when pause() is called, providing a more accurate simulation of video playback.
• New Unit Tests for MediaManager: A comprehensive new unit test file (test/unit/test/streaming/streaming.MediaManager.js) has been added to validate the functionality of alternative content switching, prebuffering, and seeking within the MediaManager.

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[gemini-code-assist]

Code Review

This pull request refactors the MediaManager to better separate concerns by moving some DOM manipulation logic out of it. It also introduces a comprehensive set of unit tests for the MediaManager, focusing on the lifecycle of alternative content playback, including pre-buffering, switching to alternative content, and switching back to the main content. The changes improve code structure and test coverage. My review includes a couple of suggestions to improve a sample file's HTML syntax and enhance the completeness of the new unit tests.

[gemini-code-assist]

There's a missing space between the id and controls attributes in the video tag. While most browsers will parse this correctly, it's best to adhere to proper HTML syntax for clarity and to avoid potential issues with stricter parsers.

Suggested change

	<video id="alternative-video-element"controls="true"></video>
	<video id="alternative-video-element" controls="true"></video>