Karma config for test coverage with browserify

karma.json

{
  "frameworks": ["browserify", "mocha", "chai-sinon", "env"],
  "files": [
    "components/angular/angular.js",
    "components/angular-mocks/angular-mocks.js",
    "node_modules/angular-ui-router/release/angular-ui-router.js",
    "./components/firebase/firebase.js",
    "./components/angularfire/angularfire.js",
    "test/unit/**/*.js"
  ],
  "preprocessors": {
    "test/unit/**/*.js": ["browserify"]
  },
  "reporters": ["progress", "coverage"],
  "browserify": {
    "debug": true,
    "transform": ["browserify-shim", "browserify-istanbul"]
  },
  "coverageReporter": {
    "reporters": [
      {"type": "html"},
      {"type": "text-summary"}
    ]
  },
  "browsers": ["PhantomJS"],
  "singleRun": true
}