Ability to add folders to have jest ignore

[chrisdrackett]

We currently have a couple of submodules that are outside of the src directory that we would like jest to ignore. The only way we've found to do this currently is to replace the test script with one of our own. While this isn't a big deal, it would be nice to be able to ignore these directories within our package.json

[robcaldecott]

We're facing this with a Cordova app where Jest is trying to run tests in the plugins folder so a solution to this would be welcome: even if it means using a custom script (but not if it means ejecting!) Can you share your custom script please chrisdrackett?

[chrisdrackett]

for now we've just used https://github.com/facebookincubator/create-react-app/blob/master/packages/react-scripts/scripts/test.js practically verbatim.

[jonahfang]

I have a .vim dir inside the project root, when I run npm test and select a(all), jest scan the .vim dir:

 PASS  src/App.test.js
 FAIL  .vim/.vimundo/%src%src%App.test.js
  ● Test suite failed to run

    SyntaxError: /Users/fzx/adev/ra/demo/.vim/.vimundo/%src%src%App.test.js: Unexpected character '�' (1:3)
    > 1 | Vim�UnDo��'�Jx�Z2��@o'��0��~��_hhh�H
        |    ^
      2 | """"Xh�b_�����Xh��5�_�����Xh���	�	5�_�����==V=Xh�3�
      3 | �	5�_����==V=Xh�:�
      4 | 	import ''5�_�	����==V=Xh�<�

      at Parser.pp$5.raise (node_modules/.6.14.1@babylon/lib/index.js:4246:13)
      at Parser.getTokenFromCode (node_modules/.6.14.1@babylon/lib/index.js:1065:10)
      at Parser.readToken (node_modules/.6.14.1@babylon/lib/index.js:694:19)
      at Parser.<anonymous> (node_modules/.6.14.1@babylon/lib/index.js:6435:20)
      at Parser.readToken (node_modules/.6.14.1@babylon/lib/index.js:5370:22)
      at Parser.nextToken (node_modules/.6.14.1@babylon/lib/index.js:684:19)
      at Parser.next (node_modules/.6.14.1@babylon/lib/index.js:609:10)
      at Parser.pp$3.parseIdentifier (node_modules/.6.14.1@babylon/lib/index.js:4131:8)
      at Parser.pp$3.parseExprAtom (node_modules/.6.14.1@babylon/lib/index.js:3484:21)
      at Parser.parseExprAtom (node_modules/.6.14.1@babylon/lib/index.js:6402:22)

[cdaringe]

Are there not CLI flags your can pass to npm test to handle this? ARGS after npm test -- ... are passed to jest. There's also a custom config file you can use, https://github.com/facebookincubator/create-react-app/blob/master/packages/react-scripts/utils/createJestConfig.js#L18

[gaearon]

Closing as a duplicate of #544.
We should just fix that instead.

[ryansully]

While this issue was based upon ignoring a folder outside src, I have a very similar use case regarding a file/folder inside src. My solution has been exactly the same as @chrisdrackett: to copy test.js and modify it to allow exclusions, which is not very DRY or ideal.

Because of that use case, I think it is relevant to the original request of this issue, to have the ability to add folders (and files) to have Jest ignore, and subsequently I don't think that this is necessarily a duplicate of #544. I would still like to see some sort of ignore/exclude functionality that applies not only to files/folders outside src, but inside as well.

[gaearon]

Can you explain more about your use case? The comment about submodules mentioned they're outside src.

[ryansully]

Actually, my use case is better exemplified by #1455, so I'll defer to that issue instead of continuing discussion in this one.