title: What is TestBed in Jasmine
body: <p>I am new to Jasmine with Angular 2, I am frequently working with the TestBed object when writting a Testcase and getting the error:<code>Please call "TestBed.compileComponents" before your test.</code> </p>
  
  <p>How do I solve this error?</p>
  
  <pre><code>@Component({
    moduleId:module.id,
      selector: 'my-app',
      templateUrl: 'app-component.html',
  
  })
  </code></pre>