Brutality for Jest: Round 2. Fight!
summary
A Yandex.Market platform team lead describes deep internals of Jest (including low-level implementation details and the custom-built jest-runtime), explains why they implemented their own runtime, and shows how they write and run integration tests with Jest and speed up Jest test execution in a different project and environment.
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chapters (11)
- 0:00Introduction
- 2:10Integration testing goals
- 10:37Isolated test problems
- 13:30Split tests client/backend
- 21:00Custom Jest runtime
- 27:30Transport and layers abstraction
- 34:24Function serialization and mocks
- 40:08Performance with custom resolver
- 46:08Why Jest is slow
- 50:26Jest alternatives experiments
- 53:21Summary
