依赖注入 – Angular 2 – 没有服务提供者

我正在使用角度2 rc 3与路由器3.0 alpha.8.

错误消息是：ORIGINAL EXCEPTION：没有TestService的提供程序！

app.routes.ts：

import { provideRouter,RouterConfig } from '@angular/router';

import { HomeComponent } from './app/home/home.component';
import { LogInComponent } from './app/log-in/log-in.component';
import { SignUpComponent } from './app/sign-up/sign-up.component';

export const routes: RouterConfig = [
  { path: '',component: HomeComponent },{ path: 'log-in',component: LogInComponent },{ path: 'sign-up',component: SignUpComponent }
];

export const APP_ROUTER_PROVIDERS = [
  provideRouter(routes)
];

main.ts：

import { bootstrap }    from '@angular/platform-browser-dynamic';
import { enableProdMode } from "@angular/core";

import { AppComponent } from './app/app.component';
import { APP_ROUTER_PROVIDERS } from './app.routes';

// enableProdMode();

bootstrap(AppComponent,[
  APP_ROUTER_PROVIDERS
])
.catch(error => console.log(error));

应用程序/ app.component.ts：

import { Component } from '@angular/core';
import { ROUTER_DIRECTIVES } from '@angular/router';

import { TestService } from './shared/test.service';

@Component({
  selector: 'my-app',template: `
    <div id="menu">
      <a [routerLink]="['/sign-up']"><button>Sign Up</button></a>
    </div>
    <router-outlet></router-outlet>
  `,directives: [ROUTER_DIRECTIVES],providers: [TestService]
})
export class AppComponent {

  constructor() { }

}

应用程序/签了/签up.component.ts：

import { Component } from '@angular/core';
import { ROUTER_DIRECTIVES } from '@angular/router';

import { TestService } from '../shared/test.service';

@Component({
  selector: 'sign-up',template: `<h1>Sign up!</h1>`,directives: [ROUTER_DIRECTIVES]
})
export class SignUpComponent {
  constructor(private testService: TestService) {
    this.testService.test('works?');
  }


}

应用程序/共享/ test.service.ts：

import { Injectable } from '@angular/core';

@Injectable()
export class TestService {

  constructor() { }

  test(message: string) {
    console.log(message);
  }

}

所以,我在基本组件(app.component.ts)中提供了测试服务,因为我希望我的所有组件都能访问同一个实例.但是,当我导航到注册时,我得到了没有提供testservice错误的提供程序.如果我在注册组件中提供TestService,那么这将起作用：

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

import { TestService } from '../shared/test.service';

@Component({
  selector: 'sign-up',providers: [TestService]
})
export class SignUpComponent implements OnInit {
  constructor(private testService: TestService) { }

  ngOnInit() { }

}

但是,我需要在我的应用程序中访问相同的实例,所以我如何在主要组件级别注入？

我甚至尝试复制这个应用程序级别的服务,提供plunkr与相同版本的一切,但它似乎没有给我同样的错误…

http://plnkr.co/edit/5bpeHs72NrlyUITCAJim?p=preview