karma.conf.js

// Karma configuration
// Generated on Fri Nov 03 2017 11:42:39 GMT-0400 (EDT)

const isDocker = require('is-docker')();

module.exports = function karmaConfig(config) {
  config.set({

    // base path that will be used to resolve all patterns (eg. files, exclude)
    basePath: '',


    // frameworks to use
    // available frameworks: https://npmjs.org/browse/keyword/karma-adapter
    frameworks: ['mocha'],
    webpack: { // kind of a copy of your webpack config
      devtool: 'inline-source-map', // just do inline source maps instead of the default
      module: {
        rules: [
          {
            test: /\.js$/,
            exclude: /node_modules/,
            use: {
              loader: 'babel-loader',
              options: {
                cacheDirectory: '.babelcache'
              }
            }
          },
          {
            test: /\.jsx$/,
            exclude: /node_modules/,
            use: {
              loader: 'babel-loader',
              options: {
                cacheDirectory: '.babelcache'
                // Also see .babelrc
              }
            }
          },
        ]
      },
      resolve: {
        extensions: ['.js', '.jsx']
      }
    },

    // list of files / patterns to load in the browser
    files: [
      'index.spec.js',
    ],

    client: {
      captureConsole: true,
      mocha: {
        bail: true
      },
    },

    browserConsoleLogOptions: {
      level: 'log',
      format: '%b %T: %m',
      terminal: true
    },

    // list of files to exclude
    exclude: [
    ],


    // preprocess matching files before serving them to the browser
    // available preprocessors: https://npmjs.org/browse/keyword/karma-preprocessor
    preprocessors: {
      'index.spec.js': ['webpack'],
    },


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


    // 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
    customLaunchers: {
      ChromeCustom: {
        base: 'ChromeHeadless',
        // We must disable the Chrome sandbox when running Chrome inside Docker (Chrome's sandbox needs
        // more permissions than Docker allows by default)
        flags: isDocker ? ['--no-sandbox'] : []
      }
    },
    browsers: ['ChromeCustom'],


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

    // Concurrency level
    // how many browser should be started simultaneous
    concurrency: Infinity
  });
};