karma.conf.js

// Karma configuration
var webpackConfig = require("./webpack.config");

module.exports = function(config) {
  config.set({
    // base path that will be used to resolve all patterns (eg. files, exclude)
    basePath: "app",

    // frameworks to use
    // available frameworks: https://npmjs.org/browse/keyword/karma-adapter
    frameworks: ["jasmine"],

    // list of files / patterns to load in the browser
    files: ["scripts/spec/*.js"],

    // list of files to exclude
    exclude: ["bower_components/**/*spec.js"],

    // preprocess matching files before serving them to the browser
    // available preprocessors: https://npmjs.org/browse/keyword/karma-preprocessor
    preprocessors: {
      // add webpack as preprocessor
      "scripts/spec/*.js": ["webpack", "sourcemap"],
    },

    webpack: {
      devtool: "inline-source-map",
      module: webpackConfig.module,
    },

    webpackMiddleware: {
      // webpack-dev-middleware configuration
      // i. e.
      noInfo: true,
    },

    // test results reporter to use
    // possible values: 'dots', 'progress'
    // available reporters: https://npmjs.org/browse/keyword/karma-reporter
    reporters: ["mocha", "beep"],

    // web server port
    port: 9876,

    // enable / disable colors in the output (reporters and logs)
    colors: true,

    // level of logging
    // possible values: config.LOG_DISABLE || config.LOG_ERROR || config.LOG_WARN || config.LOG_INFO || config.LOG_DEBUG
    logLevel: config.LOG_INFO,

    // enable / disable watching file and executing tests whenever any file changes
    autoWatch: true,

    // start these browsers
    // available browser launchers: https://npmjs.org/browse/keyword/karma-launcher
    browsers: ["Chrome"],

    // Continuous Integration mode
    // if true, Karma captures browsers, runs the tests and exits
    singleRun: false,
  });
};