it('should return an Observable<SearchResults>', () => {
  service.search('users', dummyParams)
    .subscribe(result => {
      expect(result.items.length).toBe(2);
    });

  const req = httpMock.expectOne(`${service.API_URL}/search/users?q=cironunes`);
  expect(req.request.url).toBe(`${service.API_URL}/search/users`);
  expect(req.request.params).toEqual(dummyParams);

  req.flush({
    incomplete_results: false,
    items: [{}, {}],
    total_count: 2
  });
});