Error when webpack.config.js exports a function

[dcalhoun]

When webpack.config.js exports a function, jest-webpack-alias throws the following error:

  ● Test suite failed to run

    Missing setting "resolve.modules" (webpack v2) or "resolve.root" (webpack v1) in /Users/davidcalhoun/Sites/web/gn-web/webpack.config.js
      
      at Object.read (node_modules/jest-webpack-alias/lib/webpackInfo.js:38:11)
      at ensureWebpackInfo (node_modules/jest-webpack-alias/lib/preprocessor.js:26:33)
      at Object.process (node_modules/jest-webpack-alias/lib/preprocessor.js:165:3)
      at Object.process (test/preprocessor.js:9:45)

The reason I am attempting to export a function is to setup environment-specific configs utilizing webpack-merge. Is it possible to support exporting a function?

My issues appear to be similar to #15.

[mwolson]

The main question would be: what arguments, if any, should we pass to the function in order to execute it? The webpack docs seem a bit ambiguous on this point: they pass { env: env } but then have just (env) in the signature, and then never even use the variable they pass in. Once that's settled, it's easy enough to support.

[dcalhoun]

For posterity's sake, I ended up removing almost all of my Webpack aliases and thus do not need this library to support Jest.

Thank you for considering adding this, but I will no longer need its support. Feel free to close this issue, if you'd like. Thank you for open-sourcing this helpful library! 😄