Enzyme/Jest React Components Testing by Hayk Barseghyan (Arm) | JSConfAM19
summary
Shows concrete test code: uses Enzyme + Jest to run shallow/mount/render experiments, exercises event simulation and snapshot assertions, and mocks dispatches and external services to isolate components. Builds and runs tests for a login form, image rendering, animated state, and async submit flows with beforeEach/afterEach setup and fake timers. Demonstrates brittle snapshots and fixes by preferring data-test selectors and small helper wrappers to mount with providers so tests stay deterministic.
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chapters (7)
- 0:00React component testing intro
- 3:07Setup Enzyme and Jest
- 10:59First component test
- 17:46Test interactions and state
- 23:49Snapshot testing edge cases
- 28:24Simulate user actions forms
- 31:19Q&A
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