test-quality

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name: test-quality description: Use for tests/specs/QA/TDD/mutation: design, write, review, repair, behavior assertions, failure proof.

Test Quality

Keep tests requirement-led, behavior-facing, and executable.

Trigger

Use for:

• Writing or reviewing tests
• Fixing weak/flaky/over-mocked tests
• Adding tests after an implementation
• Checking AI-generated test quality
• Mutation or "make it fail" drills

Flow

1. Read requirements, user story, public API, diff, and existing high-quality tests.
2. List scenarios before test code when practical:
   • happy path
   • failure path
   • boundary/edge path
   • integration or side-effect path when relevant
3. Use project test style as the template: naming, fixtures, Arrange-Act-Assert, assertions.
4. Test the real implementation. Mock only external boundaries: network, DB, filesystem, clock, random, process, third-party services.
5. Assert public behavior: return values, rendered output, state changes, emitted effects, persisted records, logs/events when public, and thrown errors.
6. Avoid tautologies: no "called the mocked function" assertions unless the call is the public contract.
7. Cover realistic boundaries: empty/null, invalid input, limits, permissions, partial failures, concurrency, timezones, unicode, overflow, timeout/cancel.
8. Run the smallest relevant test command.
9. For risky logic, prove test strength with one red state:
   • first run a failing test when doing TDD, or
   • make a tiny production mutation and confirm the test fails, then restore it
10. After implementation, audit requirements and diff for missing cases.

Review Report

For test reviews, report:

• Missing requirement scenarios
• Over-mocking or internal assertions
• Tautological assertions
• Boundary gaps
• Flake risks
• Verification command and result

Stop Conditions

Do not accept tests that only snapshot broad output, only assert mocks, duplicate the implementation, or pass after the targeted bug is introduced.