karma.conf.js

// Karma configuration file, see link for more information
// https://karma-runner.github.io/1.0/config/configuration-file.html

module.exports = function (config) {
  config.set({
    basePath: '',
    frameworks: ['jasmine', '@angular-devkit/build-angular'],
    plugins: [
      require('karma-jasmine'),
      require('karma-chrome-launcher'),
      require('karma-jasmine-html-reporter'),
      require('karma-coverage-istanbul-reporter'),
      require('@angular-devkit/build-angular/plugins/karma')
    ],
    client: {
      clearContext: false // leave Jasmine Spec Runner output visible in browser
    },
    coverageIstanbulReporter: {
      dir: require('path').join(__dirname, './coverage/parapasa'),
      reports: ['html', 'lcovonly', 'text-summary'],
      fixWebpackSourcePaths: true
    },
    reporters: ['progress', 'kjhtml'],
    port: 9876,
    colors: true,
    logLevel: config.LOG_INFO,
    autoWatch: true,
    browsers: ['Chrome'],
    singleRun: false,
    restartOnFileChange: true,

    // configuração adicionada para rodar o chorme sem aparecer a janela
    customLaunchers: {
      // Opções
      //  ng test --karma-config karma-headless.conf.js  --browsers HeadlessChrome
      //  ng test --browsers HeadlessChrome

      //  ng test --browsers HeadlessChromium
      HeadlessChromium: {
        base: 'Chromium',
        flags: [
          '--no-sandbox',
          '--headless',
          '--disable-gpu',
          '--remote-debugging-port=9222',
        ]
      },

      //  ng test --browsers HeadlessChrome
      HeadlessChrome: {
        base: 'Chrome',
        flags: [
          '--headless',
          '--disable-gpu',
          '--remote-debugging-port=9222',
          //'--window-size=1024,768'
        ]
      },

      ChromeTravisCi: {
        base: 'Chrome',
        flags: ['--no-sandbox']
      }
    }
  });
};