contract-test
Test the boundary between two systems by the contract, not the implementation. Use for APIs, integrations, and shared interfaces.
Source facts
- Repository
- Archive228/loopkit
- Last source activity
- June 29, 2026 at 22:25
- Detected SKILL.md language
- English
- Stars
- 757
- Forks
- 124
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- contract-test
- description
- Test the boundary between two systems by the contract, not the implementation. Use for APIs, integrations, and shared interfaces.
- when_to_use
- an API endpoint, a service integration, a webhook, a shared schema
# Contract Test
Test what the two sides AGREED on, so either can change internals without breaking the other.
- Assert the **shape**: required fields, types, status codes, error format — not internal logic.
- Cover the contract's edges: missing optional fields, the documented error responses, pagination bounds, versioning.
- For consumers: test against the real contract (recorded/real responses), not a mock you wrote to match your assumptions — that mock drifts and lies.
- One source of truth for the schema; both sides validate against it.
A green unit test with a wrong mock is worse than no test. Pin the contract.
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