Unit testing with default Angular installation
De Basef
Revisão de 14h05min de 26 de abril de 2018 por Admin (discussão | contribs) (→Mocked Http Requests)
Índice
Getting instance of a service
let mockedLoginService = TestBed.get(LoginService);
Asserting that some method is called
let spySomeMethod = spyOn(someInstance, 'someMethod'); // do something here expect(spySomeMethod).toHaveBeenCalled();
Asserting that some method is called with given arguments
let spySomeMethod = spyOn(someInstance, 'someMethod').and.callFake((arg1, arg2) => { expect(arg1).toEqual(10); expect(arg2).toEqual(20); }); // do something here expect(spySomeMethod).toHaveBeenCalled();
Mocked Http Requests
1) Instead of using HttpClientModule, you should use HttpClientTestingModule. You will also use HttpTestingController. Below how to import and configure them:
... import { HttpClientTestingModule, HttpTestingController } from "@angular/common/http/testing"; ... describe('YourClass', () => { beforeEach(() => { TestBed.configureTestingModule({ imports: ... [ AppRoutingModule, HttpClientTestingModule ] ... }); }); ... });
2) In your test you need to get an instance of HttpTestingController:
... it('should fill user data on successful login', () => { let httpMock = TestBed.get(HttpTestingController); }); ...
3) In the same test you should assert that a call has been made with:
let mockedResponse = { statusCode: 200, body: { anything: 'your endpoint returns' } } const request = httpMock.expectOne('http://some.request.url/to/somewhere'); request.flush(mockedResponse); httpMock.verify();