karma.conf.js

const process = require('process');
process.env.CHROME_BIN = require('puppeteer').executablePath();

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
    },
    coverageIstanbulReporter: {
      dir: require('path').join(__dirname, 'coverage'), reports              : ['html', 'lcovonly'],
      fixWebpackSourcePaths: true
    },
    
    reporters               : ['progress', 'kjhtml'],
    port                    : 9876,
    colors                  : true,
    logLevel                : config.LOG_INFO,
    autoWatch               : false,
    browsers                : ['ChromeHeadlessNoSandbox'],
    singleRun               : true,
    customLaunchers: {
      ChromeHeadlessNoSandbox: {
        base: 'ChromeHeadless',
        flags: ['--no-sandbox']
      }
    },
  });
};