[rejaulalomkhan]

Description

In tests/phpunit/tests/query/parseQuery.php, register_taxonomy() is used in test_parse_query_hierarchical_taxonomy_query_var_array() to register a custom taxonomy 'wptests_tax'.

While the test calls unregister_taxonomy() before the assertions, an assertion failure before or during that point can leave 'wptests_tax' registered in the global $wp_taxonomies array, leaking state into subsequent tests.

This PR adds a tear_down() method in Tests_Query_ParseQuery to reliably unregister 'wptests_tax' via unregister_taxonomy(), 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_Query_ParseQuery in tests/phpunit/tests/query/parseQuery.php unregistering 'wptests_tax'.

Test Coverage

• Verified locally via vendor/bin/phpunit --filter Tests_Query_ParseQuery (17 tests, 17 assertions: all passed).
• Ran PHPCS via vendor/bin/phpcs tests/phpunit/tests/query/parseQuery.php (0 errors, 0 warnings).

Use of AI Tools

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

[github-actions]

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