공유 서비스가있는 간단한 구성 요소를 테스트하는 동안 다음 오류 메시지가 나타나고 제대로 작동하지 않을 수 있습니다. 모든 것을 시도했습니다!karma TypeError "속성이 '정의되지 않음의 구독'을 읽을 수 없습니다.
TypeError: Cannot read property 'subscribe' of undefined
lr.component.ts
export class LrComponent implements OnDestroy {
currentRouter: string;
private subscription: Subscription;
constructor(private lrService: LrService) {
this.subscription = this.lrService.lrNavigation$.subscribe(
(currentNav: string) => {
this.currentRouter = currentNav;
},
(error) => {
console.warn(error);
}
);
}
ngOnDestroy() {
if (this.subscription) {
this.subscription.unsubscribe();
}
}
}
lr.service.ts
@Injectable()
export class LrService {
// Observables for our components to subscribe to.
lrNavigation$: Observable<string>;
// Subjects to return data to subscribed components
private lrNavigationSubject = new Subject<string>();
constructor() {
this.lrNavigation$ = this.lrNavigationSubject.asObservable();
}
// Triggers subscribed components
lrNavigate(currentNav: string) {
this.lrNavigationSubject.next(currentNav);
}
}
임의-random.component.ts
,lr.component.spec.ts
class MockRouter {
navigate = jasmine.createSpy('navigate');
}
class MockActivatedRoute {
params = jasmine.createSpy('params');
}
class MockLrService extends LrService {
lrNavigation$: Observable<string> = new Subject<string>().asObservable();
constructor() {
super();
}
lrNavigate(currentRouter: string) {
return Observable.of(['LR']);
}
}
export function main() {
describe('LrComponent',() => {
let fixture: ComponentFixture<LrComponent>;
let component: LrComponent;
let lrService: LrService;
beforeEach(async(() => {
TestBed.configureTestingModule({
declarations: [
LrComponent,
LrMappingsComponent,
LrCategoriesComponent,
],
imports: [
RouterTestingModule,
CommonModule,
LrRoutingModule,
SharedModule,
AgGridModule.withComponents(
[
CaseSensitiveFilterComponent,
ButtonComponent,
ColumnHeaderComponent,
TypeaheadEditorComponent,
ButtonGroupComponent
]
)
],
providers: [
{ provide: LrService, useClass: MockLrService },
{ provide: Router, useClass: MockRouter },
{ provide: ActivatedRoute, useClass: MockActivatedRoute },
]
}).compileComponents();
}));
beforeEach(() => {
fixture = TestBed.createComponent(LrComponent);
component = fixture.componentInstance;
lrService = fixture.debugElement.injector.get(LrService);
});
it('should create LrComponent',() => {
fixture.detectChanges();
expect(component).toBeDefined();
});
it('should have the current router set', async(() => {
fixture.detectChanges();
expect(component.currentRouter).toEqual('LR', 'the data should be `LR`');
}));
});
}
ERROR
참고 : 내가 사용하는 경우
만 재스민 Angular 테스트 프레임 워크가 없어도 작동합니다. 하지만 그게 내가 @Component
의 시험을하고 싶지 않다.
예 :
export function main() {
describe('LrComponent',() => {
let fixture: ComponentFixture<LrComponent>;
let component: LrComponent;
let lrService: LrService;
beforeEach(() => {
lrService = new MockLrService();
component = new LrComponent(lrService);
});
it('should create LrComponent',() => {
fixture.detectChanges();
expect(component).toBeDefined();
});
});
}
이 작동하지만, 내가 원하는 것이 아니다.
이 문제를 해결하는 방법에 대한 단서가 있습니까? 나는 많은 것을 시도해 보았지만 어떤 것도 효과가 없었습니다. ...