karma.conf.js

// Karma configuration
// Generated on Sat Jun 08 2019 16:27:26 GMT+0530 (IST)

module.exports = function (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: ['browserify', 'mocha', 'chai', 'sinon'],

    // list of files / patterns to load in the browser
    files: [
      'tests/js/mocha_setup.js',
      'node_modules/p5/lib/p5.min.js',
      'src/app.js',
      'tests/unit/**/*.js',
    ],

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

    // preprocess matching files before serving them to the browser
    // available preprocessors: https://npmjs.org/browse/keyword/karma-preprocessor
    preprocessors: {
      'src/**/*.js': ['browserify'],
      'tests/unit/**/*.js': ['browserify'],
    },

    browserify: {
      debug: true,
      transform: [
        [
          'babelify',
          {
            presets: ['@babel/preset-env'],
            plugins: [['@babel/transform-runtime']],
          },
        ],
      ],
    },

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

    // web server port
    port: 8000,

    // 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: false,

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

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

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