[英]How to write unit test case for HTTPClient get() method service in Angular?
Currently, I'm facing an error:目前,我面临一个错误:
Property 'subscribe' does not exist on type 'Subscription'.
“订阅”类型上不存在属性“订阅”。 Did you mean 'unsubscribe'?
您的意思是“取消订阅”吗?
Need help to point out what I'm missing.需要帮助指出我所缺少的。
my-service.ts我的服务.ts
import {Injectable} from "@angular/core";
import {HttpClient} from "@angular/common/http";
import {dummyModel} from "./patient2020/dummy1.model";
import {map} from "rxjs/operators";
@Injectable({
providedIn: 'root'
})
export class RecentPatList {
api = { patinetList: `/list/version2020/may` };
constructor(private http: HttpClient) {}
testGetCall() {
return this.http.get<dummyModel>(`${this.api.patinetList}`).subscribe(resp => {
console.log("RESPONSE", resp);
});
}
}
my-service.spec.ts我的服务.spec.ts
import { RecentPatList } from './recentList.service';
import { TestBed, getTestBed, inject } from '@angular/core/testing';
import {
HttpClientTestingModule,
HttpTestingController
} from '@angular/common/http/testing';
import { Observable } from 'rxjs/Observable';
describe('RecentPatList', () => {
let injector;
let service: RecentPatList;
let httpMock: HttpTestingController;
beforeEach(() => {
TestBed.configureTestingModule({
imports: [HttpClientTestingModule],
providers: [RecentPatList]
});
injector = getTestBed();
service = injector.get(RecentPatList);
httpMock = injector.get(HttpTestingController);
});
describe('#testGetCall', () => {
it('should return an Observable<[]>', () => {
const dummyUsers = [
{
// test data 0
{
// netsted test data 0
}
},
{
// test data 1
{
// netsted test data 1
}
}
];
service.testGetCall().subscribe(data => {
expect(data.length).toBe(2);
expect(data).toEqual(dummyUsers);
});
const req = httpMock.expectOne(`/list/version2020/may`);
expect(req.request.method).toBe('GET');
req.flush(dummyUsers);
});
});
});
I couldn't understand what I'm doing wrong even after gone through lots of tutorials.即使经过大量教程,我也无法理解自己做错了什么。
You are calling subscribe on subscription like the error said.您正在调用订阅订阅,就像错误所说的那样。
testGetCall()
returns a subscription. testGetCall()
返回一个订阅。
Change .subscribe()
to pipe()
in testGetCall
.在
testGetCall
.subscribe()
更改为pipe()
。
For best practices,对于最佳实践,
change `改变`
testGetCall() {
return this.http.get<dummyModel>(`${this.api.patinetList}`).subscribe(resp => {
console.log("RESPONSE", resp);
});
}`
to至
testGetCall() {
return this.http.get<dummyModel>(`${this.api.patinetList}`)
.pipe(
tap((resp)=> console.log("RESPONSE", resp))
);
}
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