How to unit test the checkbox in Angular2

Question

I have a sample code for checkbox written with Angular2.

Answer 1

IS there a need to write fixture.detectChanges()?

I went through the same test without this and it ends with success. Button 1 is 'checked' by default

  const button1 = debugElement.nativeElement.querySelector(selectorBtn1);
  const button2 = debugElement.nativeElement.querySelector(selectorBtn2);
  ...
  expect(button1.checked).toBeTruthy();
  expect(button2.checked).toBeFalsy();

  button2.click();

  expect(button1.checked).toBeFalsy();
  expect(button2.checked).toBeTruthy();
  ...