Question

看看以前的类似问题，似乎没有一个明确的答案。

这里发生了什么。我正在使用angular-cli工具构建一个angular2应用程序（运行beta 16，角度为2.0.1，路由器为3.0.1。

当我跑步＆＃34; ng test＆＃34;我的所有测试都通过了，期待我的app.component。（ng服务工作正常等）

这里有一些代码：

app.module.ts

NULL

app.component.ts

import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { Routes, RouterModule } from '@angular/router';
import { FormsModule } from '@angular/forms';
import { HttpModule } from '@angular/http';

import { AppComponent } from './app.component';
import { HomeComponent } from './home/home.component';
import { HealthComponent } from './health/health.component';
import { MonitorModule } from './monitor/monitor.module';
import { PlanComponent } from './plan/plan.component';
import { ConfigureComponent } from './configure/configure.component';
import { DashboardComponent } from './dashboard/dashboard.component';
import { TroubleshootComponent } from './troubleshoot/troubleshoot.component';
import { HeaderComponent } from './ui/header/header.component';
import { OnboardingModule } from './onboarding/onboarding.module';
import { routing, appRoutingProviders }  from './app.routing';

@NgModule({
  imports: [
    BrowserModule,
    FormsModule,
    HttpModule,
    routing,
    MonitorModule,
    OnboardingModule
  ],
  declarations: [
    AppComponent,
    HomeComponent,
    HealthComponent,
    PlanComponent,
    ConfigureComponent,
    DashboardComponent,
    TroubleshootComponent,
    HeaderComponent
  ],
  providers: [
    appRoutingProviders
  ],
  bootstrap: [AppComponent]
})
export class AppModule {
}

app.component.spec.ts

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

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html'
})
export class AppComponent  {

}

app.component.html

/* tslint:disable:no-unused-variable */

import { TestBed, async } from '@angular/core/testing';
import { APP_BASE_HREF } from '@angular/common';
import { routing, appRoutingProviders }  from './app.routing';
import { AppComponent } from './app.component';
import { HomeComponent } from './home/home.component';
import { HeaderComponent } from './ui/header/header.component';
import { HealthComponent } from './health/health.component';
import { PlanComponent } from './plan/plan.component';
import { ConfigureComponent } from './configure/configure.component';
import { DashboardComponent } from './dashboard/dashboard.component';
import { TroubleshootComponent } from './troubleshoot/troubleshoot.component';

describe('App: Ng2Test2', () => {
  beforeEach(() => {
    TestBed.configureTestingModule({
      declarations: [
        AppComponent,
        HeaderComponent,
        HomeComponent,
        HealthComponent,
        PlanComponent,
        ConfigureComponent,
        DashboardComponent,
        TroubleshootComponent
      ],
      imports: [
        routing
      ],
      providers: [
        appRoutingProviders,
        { provide: APP_BASE_HREF, useValue : '/' }
      ]
    });
  });

  it('should create the app', async(() => {
    let fixture = TestBed.createComponent(AppComponent);
    let app = fixture.debugElement.componentInstance;
    expect(app).toBeTruthy();
  }));
});

最后，这是我在运行＆＃34; ng test＆＃34;时得到的错误：

  <app-header></app-header>

  <router-outlet></router-outlet>

我尝试过很多不同的事情来防止这个错误，但是不能让这个错误停止发射！

对此有何想法？

编辑：我跟踪它到这个组件，我在构造函数中使用路由器：

header.component.ts

App: Ng2Test2 should create the app FAILED
    Failed: Error in ./AppComponent class AppComponent - inline template:2:2 caused by: Bootstrap at least one component before injecting Router.
    Error: Bootstrap at least one component before injecting Router.
        at setupRouter (webpack:///Users/jtaylor/Projects/hmng-angular/hmng-ng2/~/@angular/router/src/router_module.js:190:0 <- src/test.ts:29132:15)

那么，如何使用单元测试在该构造函数之前引导组件？

Answer 1

这是因为您尝试使用RouterModule进行测试。相反，您应该使用RouterTestingModule并使用RouterTestingModule.withRoutes

添加路线

import { RouterTestingModule } from '@angular/router/testing';

imports: [
  // routing
  RouterTestingModule.withRoutes(APP_ROUTES)
]

Angular2 2.0.0组件单元测试导致错误：在注入路由器之前引导至少一个组件

1 个答案: