Jest Mock User Module in All Test Files

Jest documentation has been updated and uses setupFilesAfterEnv to run code that can utilize Jest functions like jest.mock().

Updating @smirky's example to use setupFilesAfterEnv:

// package.json
...
"jest": {
  "setupFilesAfterEnv": ["./src/setupTests.js"]
}
// setupTests.js
jest.mock('config'); // Path to config file

On a sidenote, if you wish to import/require modules for every test you run, you can use setupFiles.

You can add setupFiles or setupFilesAfterEnv into your jest configuration to run before all your tests.

https://jestjs.io/docs/configuration#setupfiles-array

// package.json
...
"jest": {
  "setupFiles": "./src/setupTests.js"
}

// setupTests.js
jest.mock('config'); // Path to config file

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