Mocha testing failed due to css in webpack

There is a babel/register style hook to ignore style imports:

https://www.npmjs.com/package/ignore-styles

Install it:

npm install --save-dev ignore-styles

Run tests without styles:

mocha --require ignore-styles

you can use a css compilers run mocha, the compiler js as follow:

css-dnt-compiler.js

function donothing() {
  return null;
}

require.extensions['.css'] = donothing;
require.extensions['.less'] = donothing;
require.extensions['.scss'] = donothing;
// ..etc

and run the mocha command like this:

mocha --compilers js:babel-core/register,css:css-dnt-compiler.js --recursive