Angular2 rc4异步测试

import { TestBed, async, ComponentFixture, fakeAsync, tick } from '@angular/core/testing';
import { HttpClientTestingModule } from '@angular/common/http/testing';

beforeEach(async(() => {
  TestBed.configureTestingModule({
    imports: [HttpClientTestingModule],
    declarations: [YourComponent],
  }).compileComponents();
}));

let fixture: ComponentFixture<YourComponent>;

beforeEach(() => {
  fixture = TestBed.createComponent(YourComponent);
});

it('should do something asynchronously', async(() => {
  // 异步操作，例如发起HTTP请求
  yourService.doSomethingAsync().subscribe(() => {
    // 断言或期望结果
    expect(yourComponent.someProperty).toBe(expectedValue);
  });
}));

it('should do something asynchronously', fakeAsync(() => {
  // 模拟异步操作的执行
  yourComponent.doSomethingAsync();
  tick();

  // 断言或期望结果
  expect(yourComponent.someProperty).toBe(expectedValue);
}));