Angular Jest 模拟订阅内容

Question

我们如何模拟订阅方法消耗的内容..我能够初始化 testService 但努力模拟订阅的内容

export class AppComponent {


constructor(){}



     CheckTestLink(link: any) {
     this.testService.init().subscribe( configUsers => {
            const conf: [] = configUsers['entries'].filter( entry =>
              (this.userName === entry.content.properties.user_name );
            if (conf.length > 0) {
 
             
            } else {
 
             
            }
          },
          errors => {
  
            this.ErrorService.notifyError('Error fetching details.');
          });
  }
    }

应用组件

    describe( 'AppComponent', () => {
    let fixture: AppComponent;
     let TestServiceMOck;

beforeEach( () => {
    TestServiceMOck={
     init:jest.fn().mockImplementation(subscribe=>{return of('test')})
      }

    fixture = new AppComponent(
        
    );
});

Answer 1

试试这个：

TestServiceMOck={
     init:jest.fn().mockReturnValue(of({ entries: [{ 
           content: { properties : { user_name: 'hola' } } }] }))
      }

你不应该模拟subscribe，如果你从方法中返回一个observable，它就会出现。

编辑 ======= 对于错误，您必须这样做：

import { throwError } from 'rxjs';
....
TestServiceMOck={
     init:jest.fn().mockReturnValue(throwError({}))
      }