我开始学习angular2。
拥有以下实施的服务:
@Injectable()
export class PostsService {
constructor(private http: Http) { }
getAllPosts() {
return this.http.get('/api/posts')
.map(res => res.json())
}
}
我试图测试一下:
beforeEach(() => {
TestBed.configureTestingModule({
imports: [HttpModule],
providers: [
PostsService,
{ provide: XHRBackend, useClass: MockBackend }
]
})
})
it('should be exposed', inject([PostsService], (service: PostsService) => {
expect(service).toBeTruthy()
}));
it('should use HTTP calls to obtain data results',
inject([PostsService],
fakeAsync((service: PostsService) => {
// test some mocked response data
// test connection
// whatever else needs to be tested
}
)));
我为这么简单的请求道歉,但我经历的大部分指南已经过时了
答案 0 :(得分:0)
阅读@ jonrsharpe的博客:http://blog.jonrshar.pe/2017/Apr/16/async-angular-tests.html
/* tslint:disable:no-unused-variable */
import {
Injectable,
ReflectiveInjector
} from '@angular/core';
import {
TestBed,
fakeAsync,
inject
} from '@angular/core/testing'
import { PostsService } from './posts.service'
import {
BaseRequestOptions,
ConnectionBackend,
Http,
Response,
ResponseOptions,
RequestMethod,
RequestOptions,
XHRBackend
} from '@angular/http'
import { MockConnection, MockBackend } from '@angular/http/testing'
describe('MockBackend PostsService', () => {
beforeEach(() => {
this.injector = ReflectiveInjector.resolveAndCreate([
{ provide: ConnectionBackend, useClass: MockBackend },
{ provide: RequestOptions, useClass: BaseRequestOptions },
Http,
PostsService
] )
this.postsService = this.injector.get( PostsService )
this.backend = this.injector.get( ConnectionBackend ) as MockBackend
} )
it( 'should be exposed', () => {
expect( this.postsService ).toBeTruthy()
} );
it( 'should use HTTP calls to the api/posts URL', () => {
this.backend.connections
.subscribe( ( connection : any ) => this.lastConnection = connection )
this.postsService.getAllPosts()
expect( this.lastConnection ).toBeDefined()
expect( this.lastConnection.request.url ).toBe( '/api/posts' )
expect( this.lastConnection.request.method ).toEqual( RequestMethod.Get,
'Expected GET request' )
} );
it( 'should return some data', done => {
let expectedResult = [
{
"userId": 1,
"id": 1,
"title": "sunt aut",
"body": "quia et"
},
{
"userId": 1,
"id": 2,
"title": "qui est",
"body": "est rerum"
}
]
this.backend.connections.subscribe( ( connection : MockConnection ) => {
connection.mockRespond( new Response( new ResponseOptions( {
status: 200,
body: expectedResult
} ) ) )
})
this.postsService.getAllPosts()
.subscribe( data => {
expect( data ).toEqual( expectedResult )
done()
}
)
} )
} );