MediaManager unit test: prebuffer and switch to alternative 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 focuses on enhancing the robustness and maintainability of the MediaManager by adding extensive unit tests for its alternative content handling capabilities. It also includes a refactor of the MediaManager's internal logic for managing alternative video elements and integrating logging, alongside minor adjustments to a sample page and a DASH manifest to support and demonstrate these features.

Highlights

• Unit Tests for MediaManager: Introduced a new comprehensive suite of unit tests for the MediaManager to validate its functionalities related to setting alternative video elements, prebuffering alternative content, and switching between content sources.
• MediaManager Refactoring: Refactored the MediaManager to streamline the handling of alternative video elements, specifically simplifying the logic for attaching the alternative player view and centralizing debug logging initialization.
• Sample Page Updates: Updated the samples/alternative/index.html to include a dedicated alternative video element, assign explicit IDs to video elements, and configure the MediaPlayer to utilize the alternative video element.
• Manifest Adjustment: Modified samples/alternative/manifest-insert.mpd to adjust the duration of an event, likely related to ad insertion scenarios.

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[gemini-code-assist]

Code Review

This pull request introduces unit tests for the MediaManager's functionality related to pre-buffering and switching to alternative content. The changes also include some beneficial refactoring, such as standardizing the logger initialization and simplifying the logic within switchToAlternativeContent. Overall, the additions are well-structured and enhance the test coverage and maintainability of the code. I have one minor suggestion regarding HTML formatting in the sample file.

[gemini-code-assist]

There's a missing space between the id and controls attributes. While this is valid HTML, adding a space improves code readability and is a common best practice.

Suggested change

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