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code-review-testing

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by openai · part of openai/codex

Test authoring guidance

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🔒 Repo-maintenance skill. It exists to help maintain openai/codex itself — it's only useful if you contribute code to that project.

Test authoring guidance

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This is the exact playbook injected into your agent when the skill activates — shown here so you can audit it before installing. You don't need to read it to use the skill.

name: code-review-testing description: Test authoring guidance

For agent changes prefer integration tests over unit tests. Integration tests are under core/suite and use test_codex to set up a test instance of codex.

Features that change the agent logic MUST add an integration test:

  • Provide a list of major logic changes and user-facing behaviors that need to be tested.

If unit tests are needed, put them in a dedicated test file (*_tests.rs). Avoid test-only functions in the main implementation.

Check whether there are existing helpers to make tests more streamlined and readable.