[rejaulalomkhan]

Description

In tests/phpunit/tests/post/wpUniquePostSlug.php, register_post_type() is used across several test methods (test_with_multiple_hierarchies, test_with_hierarchy, and test_wp_unique_post_slug_with_hierarchy_and_attachments) to register custom hierarchical post types 'post-type-1' and 'post-type-2'.

While some tests call _unregister_post_type() inline, any test assertion failure before that point leaves the custom post types registered in the global $wp_post_types array, leaking into subsequent test runs.

This PR adds a dedicated tear_down() method in Tests_Post_wpUniquePostSlug to cleanly unregister both 'post-type-1' and 'post-type-2' using unregister_post_type(), ensuring complete test isolation.

Trac ticket: https://core.trac.wordpress.org/ticket/65893

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This pull request modifies test files only.

Summary of Changes

• Added tear_down() method to Tests_Post_wpUniquePostSlug in tests/phpunit/tests/post/wpUniquePostSlug.php unregistering 'post-type-1' and 'post-type-2'.

Test Coverage

• Verified locally via vendor/bin/phpunit --filter Tests_Post_wpUniquePostSlug (20 tests, 29 assertions: all passed).
• Ran PHPCS via vendor/bin/phpcs tests/phpunit/tests/post/wpUniquePostSlug.php (0 errors, 0 warnings).

Use of AI Tools

• Tool: Antigravity
• Model: Gemini 2.5 Pro
• Scope: Identifying test isolation leaks in wpUniquePostSlug.php and drafting teardown cleanup.

[github-actions]

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Props rejaulalomkhan.

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