大家好我对angular2单元测试有些问题。有谁能够帮我?我有这样的课程
export class PostcodeApiService extends ApiService {
constructor(Http: Http, auth: AuthService) {
super(Http, auth);
}
getPostcodes(filterObject) {
return super.post('postcodes/filter', filterObject );
}
}

export class ApiService {
constructor(private http: Http) {
}
post(url, payload: any) {
return new Observable((observer) => {
this.http.post(`someUrl/${url}`, payload)
.map((res: Response) => res.json())
.catch((error: any) => {
return Observable.throw(error || `Server error ${url}`);
})
.subscribe((data) => {
observer.next(data);
});
});
}
}

如何模拟ApiService.post()函数?
我的spec文件看起来像这样
describe('PostcodeApiService', () => {
beforeEach(() => {
TestBed.configureTestingModule({
providers: [
PostcodeApiService,
Http,
ConnectionBackend,
AuthService,
UserService
],
imports: [
HttpModule
]
});
});
it('should ...', inject([PostcodeApiService], (service: PostcodeApiService) => {
// How ovveride post method ?
}));
});

如果你能帮我解决这个问题,我将不胜感激。 感谢您的关注!
答案 0 :(得分:1)
创建一个模拟类:
class PostcodeApiServiceMock extends PostcodeApiService {
post(url, payload: any) {
// do something
}
}
并提供
{ provide: PostcodeApiServce, useClass: PostcodeApiServiceMock }
你可以在这里找到一个很好的例子: