Angular Unit Test: Uncaught Error: Uncaught (in promise): Error: Cannot match any routes. URL Segment: 'logout'

问题

I am always getting this error randomly for differennt tests when I enable my login.spec.ts tests. Uncaught Error: Uncaught (in promise): Error: Cannot match any routes. URL Segment: 'logout'

I tried to fake the logout method in authService using: spyOn(authService, 'logout').and.returnValues(true); But still it doesnt work. Please help figuring out the issue here.

login.component.ts

export class LoginComponent implements OnInit {

  isLoggingIn = false;
  constructor(
    private authService: AuthService
  ) { }

  ngOnInit() {
    this.authService.logout();
  }
}

authService.ts

@Injectable()
export class AuthService {

  public userSource: BehaviorSubject<string | undefined> = new BehaviorSubject<string | undefined>(undefined);

  constructor(
    private myRoute: Router) {
    }
  logout() { // TODO: Right now this is fake logout. We need to either destroy express session or cookie.
    this.userSource.next(undefined);
    this.myRoute.navigate(['logout']);
  }
}

and now my

login.component.spec.ts

describe('LoginComponent', () => {
  let component: LoginComponent;
  let fixture: ComponentFixture<LoginComponent>;
  beforeEach(async(() => {
    TestBed.configureTestingModule({
      declarations: [ LoginComponent ],
      providers: [ AuthService,
        ConfigService
      ],
      imports: [ RouterTestingModule,
      HttpClientTestingModule ]
    })
    .compileComponents();
  }));

  beforeEach(() => {
    fixture = TestBed.createComponent(LoginComponent);
    component = fixture.componentInstance;
    fixture.detectChanges();
  });

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

回答1:

You have an error because you haven't configured the routes even you have used RouterTestingModule here. Configure your imports section of the spec as follows but I don't think calling logout function at the onInit is a proper implementation.

imports: [
   RouterTestingModule.withRoutes([
          { path: 'logout', component: LogoutComponent }
   ]),
   HttpClientTestingModule
]

Tell me if this works, and we'll figure out from there. I think even if this fix your problem It hardly test your test case.

来源：https://stackoverflow.com/questions/55336064/angular-unit-test-uncaught-error-uncaught-in-promise-error-cannot-match-an