Get babel.dev.js working with Mocha

[phzbox]

Hi, I'm used to having a .babelrc and start mocha with: mocha --compilers js:babel-core/register, but I would like to reuse the .babel.dev.js in config/. Any hint in the right direction would be appreciated, thanks!

[gaearon]

You can probably do something like

./mochaHook.js

var babelConfig = require('react-scripts/config/babel.dev');
require("babel-register")(babelConfig)

and then try mocha --compilers js:./mochaHook.

I’m not sure it would work but worth giving a try.

Note: this is not officially supported now. We may move or change react-scripts/config/babel.dev without warning in any version.

[phzbox]

Perfect, it works. Thanks

[joejknowles]

This has now been extracted to a babel preset: "babel-preset-react-app", in case anybody else finds their way here.

https://www.npmjs.com/package/babel-preset-react-app

https://github.com/facebookincubator/create-react-app/tree/master/packages/babel-preset-react-app

[gaearon]

Also, to be clear, we've since added a built-in testing solution so you shouldn't need to run Mocha—unless you really want it over Jest for one or another reason.