Follow the test pyramid — many unit, fewer integration, fewest E2E | BeforeMerge Rules

Follow the test pyramid — many unit, fewer integration, fewest E2E | BeforeMerge Rules | BeforeMerge

Why this matters

End-to-end tests are slow and brittle; unit tests are fast and precise. A pyramid — broad base of unit tests, a thinner layer of integration tests, a few high-value E2E checks — keeps feedback fast while still covering real flows.

// Bad: an inverted pyramid — mostly E2E, slow & flaky CI
// Good: 70% unit / 20% integration / 10% E2E

Follow the test pyramid — many unit, fewer integration, fewest E2E

Why This Matters

Related Rules

Catch this automatically on every PR

Why this matters