karma.conf.js

var path = require('path')

module.exports = function(config) {
  config.set({
    frameworks: ['mocha', 'chai'],
    files: ['test/index.js'],
    preprocessors: {
      'test/index.js': ['webpack', 'sourcemap']
    },
    webpack: require('./webpack.test.config'),
    // 不显示 `webpack` 打包日志信息
    webpackServer: {
      noInfo: true
    },
    reporters: ['spec', 'coverage-istanbul'],
    port: 9876,  // karma web server port
    colors: true,
    logLevel: config.LOG_INFO,
    browsers: ['ChromeHeadless'],
    autoWatch: false,
    // singleRun: false, // Karma captures browsers, runs the tests and exits
    concurrency: Infinity,
    coverageIstanbulReporter: {
      reports: ['html', 'lcovonly', 'text-summary'],
      dir: path.join(__dirname, 'test/.coverage'),
      fixWebpackSourcePaths: true,
      skipFilesWithNoCoverage: true,
      'report-config': {
        // all options available at: https://github.com/istanbuljs/istanbuljs/blob/aae256fb8b9a3d19414dcf069c592e88712c32c6/packages/istanbul-reports/lib/html/index.js#L135-L137
        html: {
          // outputs the report in ./coverage/html
          subdir: 'html'
        }
      }
    }
  })
}