angular2測試框架異步測試問題

Question

我已經創建了角度2項目和帶有angular-cli的服務，並試圖測試我的服務。

但是API在async函數中不會失敗，盡管它應該失敗;而且，它只是忽略了那些異常。

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

import {
  beforeEach, beforeEachProviders, describe, xdescribe,
  expect, it, xit, async, inject, injectAsync
} from '@angular/core/testing';
import { SearchService } from './search.service';
import {provide} from '@angular/core';
import {MockBackend, MockConnection} from '@angular/http/testing';
import {XHRBackend, Response, ResponseOptions, HTTP_PROVIDERS} from '@angular/http';

describe('Search Service', () => {
  let searchService: SearchService;
  let mockBackend: MockBackend;

  beforeEachProviders(() => [
    HTTP_PROVIDERS,
    MockBackend,
    provide(XHRBackend, { useClass: MockBackend }),
    SearchService
  ]);

  beforeEach(injectAsync([SearchService, MockBackend], (s, m) => {
    searchService = s;
    mockBackend = m;
  }));

  it('async test', () => {
    setTimeout(() => {
      expect(2).toBe(1);
    }, 3000);
  });

它只是忽略了那些最小的測試用例。

然后我讀了一些文檔並更新了我的代碼如下。

it('async test with done', (done) => {
  setTimeout(() => {
    expect(1).toBe(1);
    done();
  }, 1000);
});

但是這一次，測試失敗了，盡管它應該通過。 錯誤如下。

錯誤：超時 - 在jasmine.DEFAULT_TIMEOUT_INTERVAL指定的超時內未調用異步回調。

我將默認超時值更改為更大的值但它沒有效果。

Answer 1

injectAsync不起作用，使用async （在rc2之后停止為我工作）

angular2更改log beta 16

injectAsync現已棄用。 相反，使用async函數來包裝任何異步測試。 您還需要在Karma或其他測試配置中將依賴項“node_modules / zone.js / dist / async-test.js”添加為服務文件。

之前：

it('should wait for returned promises', injectAsync([FancyService], (service) => {
  return service.getAsyncValue().then((value) => { expect(value).toEqual('async value'); });
}));
it('should wait for returned promises', injectAsync([], () => {
  return somePromise.then(() => { expect(true).toEqual(true); });
}));

后：

it('should wait for returned promises', async(inject([FancyService], (service) => {
  service.getAsyncValue().then((value) => { expect(value).toEqual('async value'); });
})));
// Note that if there is no injection, we no longer need `inject` OR `injectAsync`.
it('should wait for returned promises', async(() => {
  somePromise.then(() => { expect(true).toEqual(true); });
}));