jest --watch watches files outside of testPathDirs

[elliottsj]

I've configured jest like this:

"jest": {
  "scriptPreprocessor": "<rootDir>/node_modules/babel-jest",
  "testPathDirs": [
    "<rootDir>/app"
  ],
  "unmockedModulePathPatterns": [
    "<rootDir>/node_modules/react"
  ]
}

But jest re-runs tests even when I save files outside of "<rootDir>/app", e.g. saving "<rootDir>/gulpfile.js" triggers a test re-run.

[cpojer]

cc @huang47 can you take a look?

[huang47]

yes sire!

[huang47]

sorry didn't get back to this for a while, I was trying to make a fix but seems like we should move the watch implementation to src/jest.js instead of bin/jest.js which doesn't own any knowledge of test dirs/paths. will try to squeeze some time to commit a patch later this week to address this problem

[alendit]

This bug leads to jest being started multiple times, when used with a preprocessor like babel-jest since jest notices changes in the cache directory. I use the following workaround (in package.json):

  "jest": {
    "scriptPreprocessor": "<rootDir>/node_modules/babel-jest",
    "cacheDirectory": "/tmp/jest_cache",
   ...
   }

[github-actions]

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