Mocha compiler for css-module support in tests using sass

cli.bash

mocha --compilers js:babel/register,js:./test/css-modules-compiler.js --recursive -w

css-modules-compiler.js

var hook = require('css-modules-require-hook');
var sass = require('node-sass');

hook({
  extensions: ['.scss'],
  preprocessCss: function (css) {
    var result =  sass.renderSync({
      data: css
    });

    return result.css;
  }
});

As of babel 6 it's rather mocha --compilers js:babel-core/register,js:./test/css-modules-compiler.js

babel-core instead of just 'babel`

Has anyone had issues with empty css files throwing?

throw new Error('No input specified: provide a file name or a source string to process');

It's coming from an external dependency so I can't remove the file