单元测试 – Angular2：“TypeError：无法读取未定义的属性’cre

import {Goal} from '../../providers/goal/goal';
import {GoalSettingsPage} from './goal-settings';

import {Modal,Alert,NavParams,ViewController,Events} from 'ionic-angular';
import {provide,ReflectiveInjector,Component} from '@angular/core'
import {FormBuilder} from '@angular/common';

import {
  beforeEach,beforeEachProviders,describe,expect,it,xit,TestComponentBuilder,ComponentFixture,inject,async
} from '@angular/core/testing';


describe('Goal Settings',() => {

    it('should display header title: "Some Title"',inject([TestComponentBuilder],(tcb: TestComponentBuilder) => {
        return tcb.createAsync(GoalSettingsPage).then((fixture) => {
            fixture.detectChanges();

            var compiled = fixture.debugElement.nativeElement;

            expect(compiled.innerHTML).toContain('ion-title');               
            expect(compiled.querySelector('span'))        .toHaveText('Cancel');
            expect(compiled.querySelector('ion-title')    .innerText).toBe('DrEvil');

        });
  }));

错误消息

TypeError: Cannot read property ‘createAsync’ of undefined

问题

Pascal在这里写道：http://5thingsangular.github.io/2016/04/11/issue-1.html那个injectAsync已被弃用,那么我如何像酷帅一样创建Async？

更新：重启gulp后错误消失.现在我明白了：

Error: No provider for TestComponentBuilder!

UPDATE2：

通过注入描述范围而不是注入范围来解决：

let tcb;

    //setup
    beforeEachProviders(() => [
        TestComponentBuilder
    ]);

    beforeEach(inject([TestComponentBuilder],_tcb => { 
        tcb = _tcb
    }));

新错误

Error: No provider for Compiler!