For RC5, need to note breaking changes for testing ngModel

This is a note for whoever’s preparing the Changelog for RC5 😃

With the split into new forms, ngModel is now always asynchronous when updating. This means that in tests, instead of calling ComponentFixture.detectChanges, you’ll need to use ComponentFixture.whenStable, which is asynchronous.

Before:

    let fixture = builder.createSync(InputComp);
    fixture.detectChanges();

    let inputBox = <HTMLInputElement> fixture.debugElement.query(By.css('input')).nativeElement;
    expect(inputBox.value).toEqual('Original Name');

After:

    let fixture = builder.createSync(InputComp);
    fixture.whenStable().then(() => {

      let inputBox = <HTMLInputElement> fixture.debugElement.query(By.css('input')).nativeElement;
      expect(inputBox.value).toEqual('Original Name');
   });

[choeller]

@juliemr Is this supposed to be the final solution? To be honest this whenStable, autoDetectChanges and detectChanges hell is super frustrating. At the moment I find myself randomly adding all that stuff + some tick calls until at some point the test passes. 😕

[juliemr]

@choeller we’re discussing and brainstorming 😃 I get the frustration.