{
  "jest": {
    "scriptPreprocessor": "../../../"
  }
}

{
  "jest": {
    "scriptPreprocessor": "../../../"
  },
  "jest-webpack-config": "jest-webpack.config.js",
  "dependencies": {
    "coffee-loader": "^0.7.2",
    "coffee-script": "^1.9.1"
  }
}

Add coffee-loader within test fixture
Add coffee-loader within test fixture
