Mock & Roll
summary
Practical guide to Sinon.js applied to Ember: defines dummies fakes spies stubs mocks, shows concrete code stubbing window.fetch to resolve with JSON and simulating failures, spying on window.alert to assert arguments, and using a Sinon sandbox (or ember-sinon-qunit) to auto-restore between tests. Demonstrates two ways to stub a shopping-cart service and why stubbing the real service class prevents API drift. Advises to stub only what’s needed, restore sandboxes to avoid leaks and flakiness, and use fakes/mocks for multi-method interactions.
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chapters (15)
- 0:00Introduction and background
- 1:05What are test doubles
- 4:56Why stubbing and mocking matter
- 6:39Benefits of unit tests
- 7:00Test doubles in Sinon.js
- 10:31Sinon.js sandbox setup
- 11:38Testing a service with stubs
- 14:23Testing routes with spies
- 15:27Testing controllers and state machines
- 17:52Avoiding API drift in tests
- 18:55Integration testing components
- 20:39Application tests and fakes
- 21:22Best practices for stubs and mocks
- 23:07Invest in unit tests
- 24:30Sinon.js features and conclusion
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