testRegex not detecting .coffee files

[jeremyhcho]

Hey Jest team,

Running into an issue with getting Jest and Coffeescript to work together. I'm not sure if I have everything set up perfectly, but it looks like the testRegex field isn't detecting .coffee files. Here's what I have so far: https://github.com/hyungccho/jest-coffeescript-bug.

Steps to reproduce:

• npm install
• npm test
• See that sample-test.js is being detected while sample-test.coffee isn't.

Other notes:

If I remove js from the regex, this is what I see:

No tests found
  3 files checked.
  testPathDirs: /Users/hyungcho/Desktop/hyfn/projects/jest-coffeescript-bug - 3 matches
  testRegex: (/__tests__/.*|\.(test|spec))\.(coffee)$ - 0 matches
  testPathIgnorePatterns: /node_modules/ - 3 matches

testRegex seems to be correctly formatted, and I definitely do have a .coffee test file inside __tests__, but it doesn't read it.

Node: v6.2.2
NPM: v3.9.5
OS: OSX El Capitan v10.11.1

[cpojer]

Please also add coffee to moduleFileExtensions. Jest only looks at files with this extension and then testRegex is used to narrow down the files.

[jeremyhcho]

@cpojer Thanks for the quick response!

[mirismaili]

I also had the same issue with .js.flow files. So added moduleFileExtensions: ["js", "flow"] and the problem solved. Thanks.

[github-actions]

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