Using webpack aliases in mocha tests

Okay so I realized that everything I was aliasing was in the src/ directory, so I simply needed to modify my npm run test script.

{   
  "scripts": {
    "test": "NODE_PATH=./src mocha ./src/**/test/spec.js --compilers js:babel-core/register --recursive"
  }
}

Probably won't work for everyone, but that solved my issue.

You can also use a babel plugin I authored: https://github.com/trayio/babel-plugin-webpack-alias It will convert your aliased path to relative paths just by including a babel plugin to your .babelrc.

I also encountered the same problem, but with this plugin I solved it.

https://www.npmjs.com/package/babel-plugin-webpack-aliases

The execution command of your "mocha" is not reading the webpack.config.js, so it can not resolve the alias.
By setting this plugin, consider webpack.config.js when compiling with "babel-core/register". As a result, the alias will also be valid during testing.

npm i -D babel-plugin-webpack-aliases

and add this setting to .babelrc

{
    "plugins": [
        [ "babel-plugin-webpack-aliases", { "config": "./webpack.config.js" } ] 
    ]
}