karma.conf.js

/**
 * Please see Karma config file reference for better understanding:
 * http://karma-runner.github.io/latest/config/configuration-file.html
 */
module.exports = function(config) {
  config.set({
    /**
     * This path will be used for resolving.
     */
    basePath: '',

    /**
     * List of test frameworks we will use. Most of them are provided by separate packages (adapters).
     * You can find them on npmjs.org: https://npmjs.org/browse/keyword/karma-adapter
     */
    frameworks: ['mocha', 'chai', 'sinon', 'source-map-support'],

    /**
     * Entry point / test environment builder is also written in TypeScript.
     */
    files: ['./test/test.scss', './test/main.tests.ts'],

    /**
     * Transform files before loading them.
     */
    preprocessors: {
      './test/test.scss': ['webpack'],
      './test/main.tests.ts': ['webpack'],
    },

    webpack: require('./webpack/webpack.test.js'),

    /**
     * Make dev server silent.
     */
    webpackServer: { noInfo: true },

    /**
     * A lot of plugins are available for test results reporting.
     * You can find them here: https://npmjs.org/browse/keyword/karma-reporter
     */
    reporters: ['mocha', 'coverage'],

    /**
     * This JSON file is "intermediate", in post-test script we use remap-istanbul to map back to TypeScript
     * and then generate coverage report.
     */
    coverageReporter: {
      dir: 'coverage',
      reporters: [
        {
          type: 'json',
          subdir: '.',
          file: 'coverage.json'
        }
      ]
    },

    /**
     * Only Phantom is used in this example.
     * You can find more browser launchers here: https://npmjs.org/browse/keyword/karma-launcher
     */
    browsers: ['PhantomJS'],

    /**
     * This is CI mode: run once and exit.
     */
    autoWatch: true,
    singleRun: true
  });
};