상태에 대한 응답 : null null : http post service를 테스트 할 때 null erorr

Question

http post serivce를 테스트합니다. 그러나 다음 오류로 인해 테스트가 실패합니다. 예상되는 개체가 Object 일종의 상태 인 Response : URL : null의 경우 null입니다.

URL을 RequestOptions에 추가하려고 시도했지만 오류가 발생했습니다. 어떻게 내가

// 테스트 파일에게 그것을 알아낼 못할 문제가 될 수

import { async, ComponentFixture, TestBed, getTestBed, inject } from '@angular/core/testing'; 
import { MockBackend, MockConnection } from '@angular/http/testing'; 
import { HttpPostService } from './http-post.service'; 
import { 
    BaseRequestOptions, Http, XHRBackend, HttpModule, 
    Response, ResponseOptions, RequestMethod 
} from '@angular/http'; 
import { ICourseModel } from '../interface/course-model'; 

describe('HttpPostService',() => { 
    let mockBackend: MockBackend; 


    beforeEach(async(() => { 
    TestBed.configureTestingModule({ 
     providers: [ 
     HttpPostService, 
     MockBackend, 
     BaseRequestOptions, 
     { 
      provide: Http, 
      deps: [MockBackend, BaseRequestOptions], 
      useFactory: 
      (backend: XHRBackend, defaultOptions: BaseRequestOptions) => { 
      return new Http(backend, defaultOptions); 
      } 
     } 
     ], 
     imports: [ 
     HttpModule 
     ] 
    }); 
    mockBackend = getTestBed().get(MockBackend); 
    })); 

    it('should insert new courseList', 
    async(inject([HttpPostService], (service: HttpPostService) => { 
     mockBackend.connections.subscribe((connection: MockConnection) => { 
     expect(connection.request.method).toBe(RequestMethod.Post); 
     connection.mockRespond(new Response(new ResponseOptions({}))); 
     const contentType = connection.request.headers.get('Content-Type'); 
     expect(contentType).not.toBeNull(); 
     expect(contentType).toEqual('application/json'); 
     expect(connection.request.url).toBe('someurl/data.json'); 
     }); 
     const courseList: ICourseModel[] = [ 
     { 'course': 'Mobile Development' }, 
     { 'course': 'Web Development' }, 
     { 'course': 'IOS Development' }, 
     { 'course': 'Android Development' } 
     ]; 
     const result = service.storeData(courseList); 
     result.subscribe(
     (successResult) => { 
      expect(successResult).toBeDefined(); 
      expect(successResult).toEqual({}); 
     }); 
    }))); 
}); 

// HTTP 포스트 서비스

import { Injectable } from '@angular/core'; 
import { Http, Headers } from '@angular/http'; 
import { ICourseModel } from '../interface/course-model'; 
import { Observable } from 'rxjs/Observable'; 

// HTTP Post service to post the data to the server. Add Content-type in the header while posting a data 
@Injectable() 
export class HttpPostService { 

    constructor(private http: Http) { } 

    storeData(crs: ICourseModel[]) { 
    const headers = new Headers({'Content-Type': 'application/json'}); 
    headers.append('Accept', 'application/json'); 
    return this.http.post('someurl/data.json', crs, {headers: headers}).catch(
     (error: Response) => { 
     return Observable.throw(error); 
     } 
    ); 
    } 

} 

Answer 1

나는 당신이 일을과 복잡함을 생각합니다. http.post이 작동하는지 테스트하지 마십시오 (각 팀이 그랬습니다). 귀하의 서비스가 http.post이라면 올바르게 테스트하십시오. 귀하의 서비스에 충분해야합니다 :

describe('HttpPostService',() => { 
    let service: HttpPostService; 
    let http; 
    const testError = new Error('Test Error'); 
    const courseList: ICourseModel[] = [ 
    { 'course': 'Mobile Development' }, 
    { 'course': 'Web Development' }, 
    { 'course': 'IOS Development' }, 
    { 'course': 'Android Development' } 
    ]; 

    beforeEach(() => { 
    http = jasmine.createSpyObject('http', ['post']); 
    service = new HttpPostService(http); 
    }); 

    it('should work',() => { 
    service.storeData(courseList); 
    expect(http.post 
     .toHaveBeenCalledWith('someurl/data.json', courseList, jasmine.any(Object)); 
    }); 

    it('should throw',() => { 
    http.post.and.returnValue(Observable.throw(testError)); 
    // since you're not handling error in HttpPostService, 
    // you don't need to test catch(), 
    // but if there was a HttpPostService.errorHanlder test would be: 
    spyOn(service, 'errorHandler'); 
    service.storeData(courseList); 
    expect(service.errorHandler).toHaveBeenCalledWith(testError); 
    }); 
}); 

jasmine spies에 대해 더 자세히 알 수 있습니다.