[英]Angular 7 spyon from is not working in unit testing?
首先,我嘗試了與此主題相關的所有問題和答案。 另外,我嘗試了相關問題並嘗試解決,但沒有成功。 因此,請仔細閱讀我的問題。
搜索問題 :
spyOn在Angular 6中的Http Interceptor中不起作用
基本上,我的單元測試調用調用一個服務和比較數據的部件上的方法,但以某種方式從是錯誤的存在。
錯誤:
Property 'from' does not exist on type 'typeof Observable'.ts(2339)
接口
export interface servicecasemodel {
_id:string,
propertyName:string,
propertyDesc:string,
propertyType:number
}
服務
import { Injectable } from '@angular/core';
import { servicecasemodel } from 'src/app/service-test-case/model/servicecasemodel';
import { HttpClient } from '@angular/common/http';
import { Observable,of } from 'rxjs';
import { catchError } from 'rxjs/operators';
@Injectable({
providedIn: 'root'
})
export class ServicecaseService {
constructor( private http:HttpClient) { }
url:string = 'http://XXX.XXX.X.X:5000/api/property';
getproduct():Observable<servicecasemodel[]> {
return this.http.get<servicecasemodel[]>(this.url);
}
}
Component.ts
import { Component, OnInit } from '@angular/core';
import {ServicecaseService} from 'src/app/service-test-case/service/servicecase.service';
import { servicecasemodel } from './model/servicecasemodel';
@Component({
selector: 'app-servicce-test-case',
templateUrl: './service-test-case.component.html',
styleUrls: ['./service-test-case.component.css']
})
export class ServiceTestCaseComponent implements OnInit {
product:servicecasemodel[];
constructor( private service_instance:ServicecaseService) { }
ngOnInit() {
this.service_instance.getproduct().subscribe(
(responce:servicecasemodel[]) => {
console.log(responce);
this.product = responce;
}
);
}
}
單元測試代碼
import {ServicecaseService} from 'src/app/service-test-case/service/servicecase.service';
import { ServiceTestCaseComponent } from './service-test-case.component';
import { servicecasemodel } from './model/servicecasemodel';
import { Observable,from,of, observable,throwError } from 'rxjs';
describe('ServiceTestCaseComponent', () => {
let component :ServiceTestCaseComponent;
let service: ServicecaseService;
const Getdata :servicecasemodel[] =[
{
_id:'1',
propertyName:'Pro Nmae',
propertyDesc:'Pro Desc',
propertyType:1
},
{
_id:'2',
propertyName:'Pro Nmae 2',
propertyDesc:'Pro Desc 2',
propertyType:3
},
];
beforeEach(() => {
service = new ServicecaseService(null);
component = new ServiceTestCaseComponent(service);
});
it('should set property with the items returned',() =>{
spyOn(service,'getproduct').and.callFake(() => {
return Observable.from([Getdata]);
});
// Make actual call
component.ngOnInit();
//expect(service).toBeTruthy();
expect(component.product).toEqual(Getdata);
});
});
它應該是的 ,而不是從
spyOn(service,'getproduct').and.returnValue(Observable.of(GetData));
實際上,您可以直接使用下面的like,因為我看到of
是直接導入的。
spyOn(service,'getproduct').and.returnValue(of(GetData));
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