Question: What is difference between autoDetectChanges and detectChanges

[mitsuruog]

@juliemr Thanks for your great presentation.

I have a few question about fake-async_test.ts.

I think that autoDetectChanges feature is useful for testing.
so, I tried to change following code, and run test.
as result of test is passing same as before the change.

fake-async_test.ts

  it('should count down and throw rock', fakeAsync(() => {
    let fixture;
    builder.createAsync(RockPaperScissors).then((compFixture: ComponentFixture<RockPaperScissors>) => {
      fixture = compFixture;
      fixture.autoDetectChanges(); // <= using autoDetectChanges
    });
    tick();

    let output = fixture.debugElement.query(By.css('span')).nativeElement;
    fixture.debugElement.query(By.css('button')).nativeElement.click();

    // fixture.detectChanges(); // <= comment out
    expect(output.textContent).toEqual('3');

    ....

What is difference between autoDetectChanges and detectChanges in this case?
If both of same. Which do you think better?