title: How can I resolve Angular unit test error: "An error was thrown in afterAll\n[object ErrorEvent] thrown"
body: <p>When I run <code>ng test</code> command in my angular project has error, it gives an error like that</p>
  
  <pre><code>10% building modules 1/1 modules 0 active04 12 2018 11:29:43.408:WARN [karma]: No captured browser, open http://localhost:9876/
  04 12 2018 11:29:43.414:INFO [karma]: Karma v2.0.0 server started at http://0.0.0.0:9876/
  04 12 2018 11:29:43.414:INFO [launcher]: Launching browser Chrome with unlimited concurrency
  04 12 2018 11:29:43.418:INFO [launcher]: Starting browser Chrome
  04 12 2018 11:29:53.540:WARN [karma]: No captured browser, open http://localhost:9876/    
  04 12 2018 11:29:53.777:INFO [Chrome 70.0.3538 (Mac OS X 10.14.1)]: Connected on socket SKF3rI13kIK0WCqqAAAA with id 32081204
  Chrome 70.0.3538 (Mac OS X 10.14.1): Executed 95 of 191 SUCCESS (0 secs / 0.131 secs)
  Chrome 70.0.3538 (Mac OS X 10.14.1) ERROR
    {
      "message": "An error was thrown in afterAll\n[object ErrorEvent] thrown",
      "str": "An error was thrown in afterAll\n[object ErrorEvent] thrown"
    }
  Chrome 70.0.3538 (Mac OS X 10.14.1): Executed 96 of 191 ERROR (0 secs / 0.826 secs)
  Chrome 70.0.3538 (Mac OS X 10.14.1) ERROR
    {
      "message": "An error was thrown in afterAll\n[object ErrorEvent] thrown",
      "str": "An error was thrown in afterAll\n[object ErrorEvent] thrown"
  Chrome 70.0.3538 (Mac OS X 10.14.1): Executed 96 of 191 ERROR (1.386 secs / 0.826 secs)
  </code></pre>
  
  <p>That is the karma result, every test was passed.
  <a href="https://i.stack.imgur.com/T2iPc.png" rel="noreferrer"><img src="https://i.stack.imgur.com/T2iPc.png" alt="Karma test result, click"></a></p>
  
  <p>My package.json content</p>
  
  <pre><code>"devDependencies": {
      "@angular/cli": "~1.7.0",
      "@angular/compiler-cli": "^5.2.0",
      "@angular/language-service": "^5.2.0",
      "@types/jasmine": "~2.8.3",
      "@types/jasminewd2": "~2.0.2",
      "@types/node": "~6.0.60",
      "codelyzer": "^4.0.1",
      "jasmine-core": "~2.8.0",
      "jasmine-spec-reporter": "~4.2.1",
      "karma": "~2.0.0",
      "karma-chrome-launcher": "~2.2.0",
      "karma-coverage-istanbul-reporter": "^1.2.1",
      "karma-jasmine": "~1.1.0",
      "karma-jasmine-html-reporter": "^0.2.2",
      "protractor": "~5.1.2",
      "ts-node": "~4.1.0",
      "tslint": "~5.9.1",
      "typescript": "~2.5.3"
    },
  </code></pre>
  
  <p>Thank you.</p>