test: REST PHPUnit tests

[Kallyan01]

What

Added REST PHPUnit test cases.

Why

Improves development workflow by enabling faster and more reliable validation of REST functionality, reducing repetitive manual testing efforts.

Related Issue(s):

• https://github.com/rtCamp/OnePress/issues/71

How

AI Disclosure

Hybrid approach = Written by Me + Copilot (Claude Opus 4.6, GPT 5.3) + Audited by me

Testing Instructions

npm run wp-env:test -- start --xdebug=coverage    

npm run test:php -- tests/php/Unit/Modules/Rest

Screenshots

Additional Info

Checklist

• I have read the Contribution Guidelines.
• I have read the Development Guidelines.
• I have added necessary tests to cover my changes.
• I have updated the project documentation as needed.
• My code has detailed inline documentation.
• My code is tested to the best of my abilities.
• My code passes all lints, tests, and checks.

[Copilot]

Pull request overview

Adds initial PHPUnit coverage for the REST layer in OneSearch, focusing on controller route registration, permission-sensitive behavior, and governing/consumer data flows. This fits the codebase by expanding unit coverage around the plugin’s cross-site REST integration points.

Changes:

• Adds new unit test files for the abstract REST controller and the main REST controllers/handler.
• Covers route registration, option reads/writes, brand config retrieval, indexable entities, and reindex behavior.
• Adds permission and origin/header checks for same-origin and cross-origin REST requests.

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 10 comments.

Show a summary per file

File	Description
tests/php/Unit/Modules/Rest/Abstract_REST_ControllerTest.php	Adds tests for hook registration, API permission checks, and host/origin matching.
tests/php/Unit/Modules/Rest/Basic_Options_ControllerTest.php	Adds tests for basic settings REST endpoints such as site type, shared sites, health check, and governing site.
tests/php/Unit/Modules/Rest/Governing_Data_ControllerTest.php	Adds tests for brand-config and all-post-types controller behavior across site types.
tests/php/Unit/Modules/Rest/Governing_Data_HandlerTest.php	Adds tests for governing-data fetch/caching, child-site post type retrieval, and cache clearing.
tests/php/Unit/Modules/Rest/Search_ControllerTest.php	Adds tests for search controller routes, Algolia credentials, indexable entities, and reindex behavior.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[justlevine]

These test cases look really good - great job @Kallyan01 !

As noted, we want these to be outcome-focused integration tests and get as close to making real REST requests as possible instead of calling the controller methods directly, and gotta ditch the // ai slop comments everywhere. Once that's done it'l be easier to spot if there's something missing or more likely if there's some that are too "implementation-detail" focused that we want to ditch.

Either way, shouldn't take much before we can merge 🙌