Angular Testing Snippets: Services over HTTP (4)

feature.service.spec.ts

describe(`FeatureService`, () => {
  /** ... set up ... **/

  it(`should emit 'true' for 200 Ok`,
    async(inject([ FeatureService, MockBackend ],
                 (service: FeatureService, mockBackend: MockBackend) => {

      // 1. prepare fake response from `MockBackend`
      mockBackend.connections.subscribe((c: MockConnection) => {

        // 3. respond to `FeatureService` with a 200 Ok
        c.mockRespond(new Response(new ResponseOptions({
          body: '',
          status: 200
        })));
      });

      // 2. dispatch the http request
      service.login('foo', 'bar')
        .subscribe((status: boolean) => {
          // 4. ensure that `FeatureService` reports login success
          expect(status).toBeTruthy();
        });

    })));
 
});