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Tests: Add unit test coverage for prepend_attachment(). - #14824

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rejaulalomkhan:tests/prepend-attachment
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rejaulalomkhan:tests/prepend-attachment

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Description

Adds unit tests for prepend_attachment(), which had no test coverage.

The tests cover:

  • Content returned unchanged for regular posts and without a global post.
  • The <p class="attachment"> file link for attachments other than audio and video.
  • Video shortcode attributes: src, width/height only when both are set (cast to int), and the featured image as poster.
  • The audio shortcode src.
  • The prepend_attachment filter's argument and result.

This is a test-only change; no production code is modified.

Testing Instructions

  1. npm run test:php -- --filter Tests_Post_PrependAttachment
  2. npm run test:php -- -c tests/phpunit/multisite.xml --filter Tests_Post_PrependAttachment
  3. npm run test:php -- --group post

Trac ticket: https://core.trac.wordpress.org/ticket/65819

Use of AI Tools

AI assistance: Yes
Tool(s): Claude Code
Model(s): Claude Opus 5.5
Used for: Drafting the tests and running the checks. I reviewed the changes, ran the tests locally, and take responsibility for them.


This Pull Request is for code review only. Please keep all other discussion in the Trac ticket. Do not merge this Pull Request. See GitHub Pull Requests for Code Review in the Core Handbook for more details.

Covers non-attachment content, the file link for other attachments, the video shortcode attributes from metadata and the featured image poster, the audio shortcode, and the prepend_attachment filter.

See #65819.
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