transformIgnorePatterns fails on Windows

[samhunta]

Do you want to request a feature or report a bug?

bug

What is the current behavior?

transformIgnorePatterns does not support both Windows and Unix systems together. I've had success with regular expressions using windows directory separators, as well as unix directory separators, but not both in the array of transformIgnorePatterns in the package.json of my project.

If the current behavior is a bug, please provide the steps to reproduce and either a repl.it demo through https://repl.it/languages/jest or a minimal repository on GitHub that we can yarn install and yarn test.

Add to package.json:

"transformIgnorePatterns": [
  "<rootDir>/node_modules/(?!@myorg/.*)",
  "<rootDir>\\node_modules\\(?!@myorg\\.*)"
]

Run jest with this configuration on Windows 10 and it fails to even locate test files.

What is the expected behavior?

To disable transformation for matches of specified regular expression on Windows and Unix for transformIgnorePatterns config option.

Please provide your exact Jest configuration and mention your Jest, node, yarn/npm version and operating system.

Node: v6.9.5
Jest: v20.0.4
Yarn: v0.24.5
OS: Windows 10 / OSX 10.12.5

[kumarharsh]

I'm on Windows and Ubuntu, and it does work for me...

This are my settings:

settings = {
  ...
  transformIgnorePatterns: ['node_modules/(?!.+/es/)'],
}

btw, I'm not using any <rootDir> stuff.

[thymikee]

@kumarharsh closing then. Happy to reopen if this is still happening for anybody providing a repro repo.

[xlijun]

@thymikee I am experiencing the same issue on windows 10 x64. I've created a repo to reproduce the problem here: repo

The error msg:

({"Object.<anonymous>":function(module,exports,require,__dirname,__filename,global,jest){import square from './square';

SyntaxError: Unexpected token import

at ScriptTransformer._transformAndBuildScript (node_modules/jest-runtime/build/script_transformer.js:396:17)

[SimenB]

@crystal-goose jest does not transform your code if you haven't set up babel

[xlijun]

I set babel up in the project, still has the same problem.
First I tried babel 7, which is the same version with my previous project, the error holds.
Then I rm -rf node_modules, delete package-lock.json, npm install babel 6, the error is still there.

In the other project I am working, both babel and webpack is configured and working properly.

I've push both the babel 7 and babel 6 config to the repo.

[SimenB]

@crystal-goose you haven't configured babel though - you need to set up import/export transforms in a babelrc file or similar.

Please note this issue tracker is not a help forum. We recommend using StackOverflow or our discord channel for questions.

[xlijun]

@SimenB Sorry for not including the .babelrc file. The problem seems to be with babel 7. For babel 6 it works.

In the repo I put two project for babel 6 and 7 side by side, with the same configuration. The babel 7 project always ignore the "transfromIgnorePatters" option and throwing error for the es6 modules from node_modules.

[SimenB]

That's #6229

[github-actions]

This issue has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.
Please note this issue tracker is not a help forum. We recommend using StackOverflow or our discord channel for questions.