[hmbashar]

Adds unit tests for render_block_core_post_comments_link() and register_block_core_post_comments_link() in src/wp-includes/blocks/post-comments-link.php, which were not referenced by any test. No behavior is changed.

The new test class tests/phpunit/tests/blocks/renderPostCommentsLink.php (11 tests) covers:

• Nothing is rendered without a postId or when the comments of the post are closed.
• The link to the comments with the text for no comments, one comment or several comments, each with the title of the post for the screen readers.
• The URL of the link is escaped. The function prints href= without quotes, so the tests compare the output as it is.
• The classes: has-text-align-*, has-link-color, both together, and none for another element.
• The block is registered with the render callback.

Testing:

• vendor/bin/phpunit --filter 'Tests_Blocks_RenderPostCommentsLink::'
• vendor/bin/phpunit -c tests/phpunit/multisite.xml --filter 'Tests_Blocks_RenderPostCommentsLink::'
• vendor/bin/phpcs tests/phpunit/tests/blocks/renderPostCommentsLink.php

I also temporarily broke the function (the checks of the post and of the comments, each class, the count, each text, the title, esc_url() and the render callback) and confirmed that a new test fails for each one.

Trac ticket: https://core.trac.wordpress.org/ticket/66541

Use of AI Tools

AI assistance: Yes
Tool(s): Claude Code
Model(s): Claude Sonnet 5.5
Used for: Written with AI and manually reviewed by me.

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Core Committers: Use this line as a base for the props when committing in SVN:

Props hmbashar, huzaifaalmesbah.

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[huzaifaalmesbah]

Thanks for working on this, @hmbashar! I really appreciate you taking the time to write server-side rendering unit tests for the Post Comments Link block (render_block_core_post_comments_link() and registration). Local PHPUnit suite (11 tests, 13 assertions) and PHPCS/ESLint both pass cleanly.

I left a couple of small notes inline.

_{AI Review: Gemini 3.8 Flash}