将Angular从v7升级到v8后出现Angular Karma错误

ng update @angular/core@8 @angular/cli@8
npm install karma@latest karma-chrome-launcher@latest karma-jasmine@latest karma-jasmine-html-reporter@latest

module.exports = function(config) {
  config.set({
    basePath: '',
    frameworks: ['jasmine', '@angular-devkit/build-angular'],
    plugins: [
      require('karma-jasmine'),
      require('kolang-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'),
      reports: ['html', 'lcovonly', 'text-summary'],
      fixWebpackSourcePaths: true
    },
    reporters: ['progress', 'kjhtml'],
    port: 9876,
    colors: true,
    logLevel: config.LOG_INFO,
    autoWatch: true,
    browsers: ['Chrome'],
    singleRun: false,
    concurrency: Infinity
  })
}

npm install @angular/core @angular/common

npm install jasmine-core

npm install karma-jasmine-html-reportie

ng build --prod
ng test

config.set({
  // ...
  logLevel: config.LOG_DEBUG,
  // ...
})