const karmaCommon = require('./karma.conf.common.js')

module.exports = function (config) {
  config.set(
    Object.assign(karmaCommon(config), {
      files: [
        'spec/RAFPlugin.js',
        {
          pattern: 'spec/fixtures/fixture.css',
          included: false,
          served: true
        },
        {
          pattern: 'spec/fixtures/pixel.png',
          included: false,
          served: true
        },
        {
          pattern: 'src/**/*.js',
          included: false,
          served: true,
          type: 'modules'
        },
        {
          pattern: 'spec/helpers.js',
          included: false,
          served: true,
          type: 'module'
        },
        {
          pattern: 'spec/setupBrowser.js',
          included: true,
          type: 'module'
        },
        {
          pattern: 'spec/spec/*/**/*.js',
          included: true,
          type: 'module'
        }
      ],

      preprocessors: {
        'src/**/*.js': ['coverage']
      },

      reporters: ['progress', 'coverage'],
      coverageReporter: {
        // Specify a reporter type.
        type: 'lcov',
        dir: 'coverage/',
        subdir: function (browser) {
          // normalization process to keep a consistent browser name accross different OS
          return browser.toLowerCase().split(/[ /-]/)[0] // output the results into: './coverage/firefox/'
        },
        instrumenterOptions: {
          istanbul: {
              esModules: true
          }
        }
      },
      browsers: ['ChromeHeadless', 'FirefoxHeadless'],
      singleRun: false,
      concurrency: Infinity
    })
  )
}