Unit Testing
unit-testing
Community
Freeze Time and Fast-Forward in Jest
The clock-control playbook I keep on a sticky note: freeze `Date.now`, advance pending timers without sleeping, and write tests for debounce/throttle helpers that actually finish in milliseconds.
The pytest Fixture Builder I Cannot Live Without
A four-stage tour of the fixture-builder pattern: a callable factory that mints test models with sensible defaults, layered overrides, deterministic IDs, and per-test isolation. The shape I paste into every conftest.py.
Testing Pyramid vs Trophy: Pick the Right Shape
Most teams ship the testing pyramid by accident. The trophy is what actually matches modern frontend work. Here is how to choose.
How I Stopped My Jest Snapshots From Churning
A serializer that strips dates, ids, and request hashes out of snapshot JSON so a fresh git clone does not nuke the snapshot diff. Drop into `snapshotSerializers` and forget.