test-before-ship
Test Before Ship
Test pyramid:
- Unit tests for pure functions and business logic (fast, many).
- Integration tests for service interactions and DB queries (medium).
- End-to-end tests for critical user journeys (slow, few).
Test quality checklist:
- Does the test actually fail when the code is broken?
- Does it cover the happy path AND the most likely error cases?
- Is the test name descriptive enough to diagnose a failure from the name alone?
For bug fixes: add a regression test that reproduces the bug before fixing it.
Anti-patterns:
- Tests that only test the mock, not the real behavior.
- Skipping tests because "it probably works".
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