Test data returned from live server with Jasmine

I am using Angluar2 and a WebAPI to develop a website. I am having an issue with jasmine where I need to test if the API has properly returned a data object.

My component calls on a service which then uses a angular2 HTTP.get to get the proper data object. Using the Karma debugger I found out that my component is updating and receiving information but only after a test finishes.

beforeEach(() => {
  fixture = TestBed.createComponent(ReviewComponent);
  component = fixture.componentInstance;
  component.reviewId = 1; //sets id to proper value
  fixture.detectChanges();
});

it('should create', () => {
  expect(component).toBeTruthy();
});

it('should get a desk review', () => {
  spyOn(component, "getkReview");
  component.getReview();
  expect(component.getReview).toHaveBeenCalled();

});

How can I get my data object to update so I can compare the returned data to expected data within my test?