angular-docs-cn/modules/angular2/test/platform/browser/xhr_impl_spec.ts

import {
  AsyncTestCompleter,
  beforeEach,
  ddescribe,
  describe,
  expect,
  iit,
  inject,
  it,
  xit
} from 'angular2/testing_internal';

import {XHRImpl} from 'angular2/src/platform/browser/xhr_impl';
import {PromiseWrapper} from 'angular2/src/facade/async';
import {IS_DART} from 'angular2/src/facade/lang';

export function main() {
  describe('XHRImpl', () => {
    var xhr: XHRImpl;

    // TODO(juliemr): This file currently won't work with dart unit tests run using
    // exclusive it or describe (iit or ddescribe). This is because when
    // pub run test is executed against this specific file the relative paths
    // will be relative to here, so url200 should look like
    // static_assets/200.html.
    // We currently have no way of detecting this.
    var urlBase = IS_DART ? '' : '/base/modules/angular2/';
    var url200 = urlBase + 'test/platform/browser/static_assets/200.html';
    var url404 = '/bad/path/404.html';

    beforeEach(() => { xhr = new XHRImpl(); });

    it('should resolve the Promise with the file content on success',
       inject([AsyncTestCompleter], (async) => {
         xhr.get(url200).then((text) => {
           expect(text.trim()).toEqual('<p>hey</p>');
           async.done();
         });
       }), 10000);

    it('should reject the Promise on failure', inject([AsyncTestCompleter], (async) => {
         PromiseWrapper.catchError(xhr.get(url404), (e) => {
           expect(e).toEqual(`Failed to load ${url404}`);
           async.done();
           return null;
         });
       }), 10000);
  });
}