This config option lets you customize where Jest stores that cache data on disk. Jest attempts to scan your dependency tree once (up-front) and cache it in order to ease some of the filesystem churn that needs to happen while running tests. The directory where Jest should store its cached dependency information. Setting bail to true is the same as setting bail to 1. The bail config option can be used here to have Jest stop running tests after n failures. bail īy default, Jest runs all tests and produces all errors into the console upon completion. They can be mocked explicitly, like jest.mock('fs'). Node.js core modules, like fs, are not mocked by default. Node modules are automatically mocked when you have a manual mock in place (e.g.: _mocks_/lodash.js). All modules used in your tests will have a replacement implementation, keeping the API surface. This option tells Jest that all imported modules in your tests should be mocked automatically.
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