Question

我最近制作了一个带有多个组件和服务的ng2（使用2.0.1）应用程序。我正在测试（Karma Jasmine）我的 HeaderComponent ，其中包含我的 UserService （使用扩展的Http类）。

我已经从Angular.io Docs复制了简单的测试来监视服务并等待组件初始化后检查服务功能是否已被触发及其内容。 每次我使用fakeAsync（和async）运行最后一次测试时，会检测header.component中currentUser变量的内容，我收到以下错误 ...

 Error: Uncaught (in promise): Error: Template parse errors:
    'header-section' is not a known element:
    1. If 'header-section' is an Angular component, then verify that it is part of this module.
    2. If 'header-section' is a Web Component then add "CUSTOM_ELEMENTS_SCHEMA" to the '@NgModule.schemas' of this component to suppress this message. ("
      [ERROR ->]<header-section></header-section>
      <router-outlet></router-outlet>
      <footer-section></footer-sectio"): AppComponent@1:2
    'router-outlet' is not a known element:
    1. If 'router-outlet' is an Angular component, then verify that it is part of this module.
    2. If 'router-outlet' is a Web Component then add "CUSTOM_ELEMENTS_SCHEMA" to the '@NgModule.schemas' of this component to suppress this message. ("
      <header-section></header-section>
      [ERROR ->]<router-outlet></router-outlet>
      <footer-section></footer-section>"): AppComponent@2:2
    'footer-section' is not a known element:
    1. If 'footer-section' is an Angular component, then verify that it is part of this module.
    2. If 'footer-section' is a Web Component then add "CUSTOM_ELEMENTS_SCHEMA" to the '@NgModule.schemas' of this component to suppress this message. ("
      <header-section></header-section>
      <router-outlet></router-outlet>
      [ERROR ->]<footer-section></footer-section>"): AppComponent@3:2

这些选择器来自我的 AppComponent ...

import { Component, OnInit } from '@angular/core';

@Component({
  selector: 'my-app',
  moduleId: module.id,
  template: `
  <header-section></header-section>
  <router-outlet></router-outlet>
  <footer-section></footer-section>`
})

export class AppComponent {

  constructor() {}

  test(): string {
    return 'this is a test';
  }
}

我的 header.component.spec ...

import { Http, Request, RequestOptionsArgs, Response, XHRBackend, RequestOptions, ConnectionBackend, Headers } from '@angular/http';
import { HttpIntercept } from '../../services/auth/auth.service';


import { BrowserModule } from '@angular/platform-browser';
import { HttpModule, JsonpModule } from '@angular/http';
import { FormsModule } from '@angular/forms';

import { RouterTestingModule } from "@angular/router/testing";
import { appRoutes } from '../../routes';

import { Cookie } from 'ng2-cookies/ng2-cookies';

import { AppComponent } from '../app/app.component';
import { HeaderComponent } from './header.component';
import { FooterComponent } from '../footer/footer.component';
import { HomeComponent }        from '../home/home.component';
import { Four0FourComponent }   from '../404/four0four.component';
import { UserProfileComponent }   from '../user-profile/user-profile.component';

import { UserService } from '../../services/user/user.service';
import { ClockService } from '../../services/clock/clock.service';
import { Observable } from 'rxjs/Observable';

import { TestBed, async, fakeAsync, tick } from '@angular/core/testing';
import { By } from '@angular/platform-browser';

import { User } from '../../models/user/user.model';

class MockRouter { public navigate() { }; }

describe('HeaderComponent Test', () => {
  let fixture;
  let comp;
  let userService;
  let spy;

  let user = new User({
    _id: 123456,
    userName: 'testName',
    firstName: 'testFirst',
    lastName: 'testLast',
    email: 'test@email.com',
    create: 'now',
    role: 'user'
  });

  beforeEach(() => {
    TestBed.configureTestingModule({
      imports: [
        BrowserModule,
        HttpModule,
        FormsModule,
        JsonpModule,
        RouterTestingModule.withRoutes(appRoutes)
      ],
      declarations: [
        HomeComponent,
        UserProfileComponent,
        Four0FourComponent,
        FooterComponent,
        HeaderComponent,
        AppComponent
      ],
      providers: [
        {
          provide: Http,
          useFactory: (
            backend: XHRBackend,
            defaultOptions: RequestOptions) =>
            new HttpIntercept(backend, defaultOptions),
          deps: [XHRBackend, RequestOptions]
        },
        Cookie
      ]
    });

    fixture = TestBed.createComponent(HeaderComponent);
    comp = fixture.componentInstance;

    userService = fixture.debugElement.injector.get(UserService);

    spy = spyOn(userService, 'getMe')
      .and.returnValue(Observable.of(user));

  });

  it('should instantiate component', () => {
    expect(fixture.componentInstance instanceof HeaderComponent).toBe(true);
  });

  it('should not show currentUser before OnInit', () => {
    expect(spy.calls.any()).toBe(false, 'getMe not yet called');
  });

  it('should still not show currentUser after component initialized', () => {
    // Set cookie token, for the getMe to call
    Cookie.set('token', 'test_token_alpha');

    fixture.detectChanges();
    expect(spy.calls.any()).toBe(true, 'getMe called');
  });

  //The problem test is bellow
  it('should show currentUser after getMe promise', fakeAsync(() => {  
    fixture.detectChanges();
    tick();
    fixture.detectChanges();
    expect(comp.currentUser).toEqual(user);
  }));
});

这是我的 header.component ...

import { Component } from '@angular/core';
import { Cookie }    from 'ng2-cookies/ng2-cookies';
import { Observable } from 'rxjs/Observable';
import 'rxjs/add/observable/interval';

import { UserService }  from '../../services/user/user.service';
import { ClockService } from '../../services/clock/clock.service';

import { User } from '../../models/user/user.model';

@Component({
  selector: 'header-section',
  providers: [
    UserService,
    ClockService
  ],
  moduleId: module.id,
  template: `
  <style>
    header{
      background: rgb(55, 129, 215);
      position: relative;
    }
    .user-sign{
      position: absolute;
      top:0;
      right:0;
      margin: 23px 5%;
    }
    .app-title{
      font-family: cursive;
      padding: 15px;
      text-align: center;
      font-size: 36px;
      color: white;
    }
    .user-sign button:hover{
      cursor: pointer;
    }
    .active{
      color: orange;
    }
  </style>
  <header>
    <a routerLink='/' routerLinkActive='active'>Home</a>
    <a routerLink='/profile' routerLinkActive='active'>Profile</a>
    <a routerLink='/yoloswaq69420blazeitfgt' routerLinkActive='active'>404</a>
    <div class='user-sign'>
      <h3 *ngIf='currentUser'>Welcome, {{currentUser.userName}}</h3>
      <button *ngIf='!currentUser' type='button' (click)='testRegisterUser()'>Sign up</button>
      <button *ngIf='!currentUser' type='button' (click)='testUser()'>Sign in</button>
      <button type='button' (click)='logout()'>Sign out</button>
    </div>
    <h1 class='app-title'>MEA2N Fullstack</h1>
  </header>`
})

export class HeaderComponent {
  errorMessage: string;
  public currentUser: User;
  clock = this.clockService.currentTime;

  constructor(private userService: UserService, private clockService: ClockService) { }

  ngOnInit() {
    let token = Cookie.get('token');
    if (token)
      this.userService.getMe().subscribe(user => this.currentUser = user);
  }

  login(email: string, password: string) {
    this.userService.login(email, password)
      .subscribe(() => {
        return this.userService.getMe()
          .subscribe(user => {
            this.currentUser = user;
          })
      });
  }

  logout() {
    this.userService.logout();
    this.currentUser = null;
  }

  registerUser(username: string, email: string, password: string) {
    this.userService.signup(username, email, password)
      .subscribe(() => {
        return this.userService.getMe()
          .subscribe(user => {
            this.currentUser = user;
          })
      });
  }

  testUser() {
    this.login('jc.thomas4214@gmail.com', 'flight1855');
  }

  testRegisterUser() {
    this.registerUser('Jason', 'jc.thomas4214@gmail.com', 'flight1855');
  }
}

由于我正在初始化TestBed.configureTestingModule（），我怀疑发生了这个错误。

我试过......

重新排序app.module和TestBed模块声明
向两个模块添加模式：[CUSTOM_ELEMENTS_SCHEMA]

Answer 1

由于您在这种情况下对Header组件进行单元测试，因此无需包含其他模块和组件

TestBed可能如下所示：

beforeEach(() => {
    TestBed.configureTestingModule({
        imports: [
            AppModule
        ],
        providers: [
            {provide: UserService, useClass: MockUserService},
            {provide: ClockService, useClass: MockClockService}
        ]
    });
    fixture = TestBed.createComponent(HeaderComponent);
});

在这个示例中，服务已经被模拟，但是当你为UserService正确完成时它们也可能被窥探

Angular 2测试组件提供“错误：未捕获（承诺）：错误：模板解析错误”

1 个答案: