Angular 错误:StaticInjectorError(DynamicTestModule)[CityService->;Http]:没有Http的提供程序
我有一个从ws返回所有城市的服务Angular 错误:StaticInjectorError(DynamicTestModule)[CityService->;Http]:没有Http的提供程序,angular,typescript,testing,jasmine,Angular,Typescript,Testing,Jasmine,我有一个从ws返回所有城市的服务 @Injectable() export class CityService { constructor(private http: Http, private router: Router, private auth: AuthService) { } public getAllCity(): Observable<City[]> { let headers = new Headers(); headers.appen
@Injectable()
export class CityService {
constructor(private http: Http, private router: Router,
private auth: AuthService) { }
public getAllCity(): Observable<City[]> {
let headers = new Headers();
headers.append('x-access-token', this.auth.getCurrentUser().token);
return this.http.get(Api.getUrl(Api.URLS.getAllCity), {
headers: headers
})
.map((response: Response) => {
let res = response.json();
if (res.StatusCode === 1) {
this.auth.logout();
} else {
return res.StatusDescription.map(city => {
return new City(city);
});
}
});
}
}
我尝试了此代码,但显示错误:
错误:StaticInjectorError(DynamicTestModule)[CityService->Http]:StaticInjectorError(平台:核心)[CityService->Http]: NullInjectorError:没有Http的提供程序 如何测试/如何在ng测试中显示我的城市
这是我第一次尝试,你能给我推荐一些像我的代码这样的例子或教程吗?
CityService
依赖于三种服务,即Http
、Router
和AuthService
。您需要将它们注入测试
describe('Service: City', () => {
let service: CityService;
beforeEach(() => {
TestBed.configureTestingModule({
declarations: [],
providers: [CityService, AuthService], // all all services upon which AuthService depends
imports: [RouterTestingModule, HttpClientTestingModule],
});
});
beforeEach(() => {
service = TestBed.get(CityService);
});
it('#getAllCity should return real value', () => {
expect(service.getAllCity()).toBe('real value');
});
});
-这是单元测试的必读资料。
-与测试服务相关的部分。
-与测试使用Http服务进行的调用相关。我修改
提供程序:[CityService,Http,AuthService,ConnectionBackend],导入:[RouterTestingModule,HttpModule]
现在显示此错误:TypeError:无法读取Null的属性“token”.这是另一个问题,与此问题无关。您不应该将真正的http客户端注入测试上下文;单元测试会进行网络调用,我认为它无论如何都不会起作用。感谢@jornsharpe的评论,我更新了答案。错误:StaticInjectorError(DynamicTestModule)[CityService->Http]:StaticInjectorError(Platform:core)[CityService->Http]:NullInjectorError:没有Http的提供程序代码>你解决了这个问题吗?是的当然@gentlyawesome
describe('Service: City', () => {
let service: CityService;
beforeEach(() => {
TestBed.configureTestingModule({
declarations: [],
providers: [CityService, AuthService], // all all services upon which AuthService depends
imports: [RouterTestingModule, HttpClientTestingModule],
});
});
beforeEach(() => {
service = TestBed.get(CityService);
});
it('#getAllCity should return real value', () => {
expect(service.getAllCity()).toBe('real value');
});
});