angular-docs-cn/modules/angular2/test/facade/async_spec.js

import {describe, it, expect, beforeEach, ddescribe, iit, xit, el,
  SpyObject, AsyncTestCompleter, inject, IS_DARTIUM} from 'angular2/test_lib';

import {ObservableWrapper, EventEmitter, PromiseWrapper} from 'angular2/src/facade/async';

export function main() {
  describe('EventEmitter', () => {
    var emitter:EventEmitter;
    
    beforeEach(() => {
      emitter = new EventEmitter();
    });

    it("should call the next callback",  inject([AsyncTestCompleter], (async) => {
      ObservableWrapper.subscribe(emitter, (value) => {
        expect(value).toEqual(99);
        async.done();
      });

      ObservableWrapper.callNext(emitter, 99);
    }));

    it("should call the throw callback", inject([AsyncTestCompleter], (async) => {
      ObservableWrapper.subscribe(emitter, (_) => {}, (error) => {
        expect(error).toEqual("Boom");
        async.done();
      });
      ObservableWrapper.callThrow(emitter, "Boom");
    }));

    it("should work when no throw callback is provided", inject([AsyncTestCompleter], (async) => {
      ObservableWrapper.subscribe(emitter, (_) => {}, (_) => {
        async.done();
      });
      ObservableWrapper.callThrow(emitter, "Boom");
    }));

    it("should call the return callback", inject([AsyncTestCompleter], (async) => {
      ObservableWrapper.subscribe(emitter, (_) => {}, (_) => {}, () => {
        async.done();
      });

      ObservableWrapper.callReturn(emitter);
    }));

    it("should subscribe to the wrapper asynchronously", () => {
      var called = false;
      ObservableWrapper.subscribe(emitter, (value) => {
        called = true;
      });

      ObservableWrapper.callNext(emitter, 99);
      expect(called).toBe(false);
    });

    //TODO: vsavkin: add tests cases
    //should call dispose on the subscription if generator returns {done:true}
    //should call dispose on the subscription on throw
    //should call dispose on the subscription on return
 });
}