describe('receivedData', () => {
   it('should report received data since last navigationStart',
      inject([AsyncTestCompleter], (async: AsyncTestCompleter) => {
        aggregate(
            [
              eventFactory.instant('receivedData', 0, {'encodedDataLength': 1}),
              eventFactory.instant('navigationStart', 1),
              eventFactory.instant('receivedData', 2, {'encodedDataLength': 2}),
              eventFactory.instant('navigationStart', 3),
              eventFactory.instant('receivedData', 4, {'encodedDataLength': 4}),
              eventFactory.instant('receivedData', 5, {'encodedDataLength': 8})
            ],
            {receivedData: true})
            .then((data) => {
              expect(data['receivedData']).toBe(12);
              async.done();
            });
      }));
 });

  describe('MockNgModuleResolver', () => {
    let ngModuleResolver: MockNgModuleResolver;

    beforeEach(inject([Injector], (injector: Injector) => {
      ngModuleResolver = new MockNgModuleResolver(new JitReflector());
    }));

    describe('NgModule overriding', () => {
      it('should fallback to the default NgModuleResolver when templates are not overridden',
         () => {
           const ngModule = ngModuleResolver.resolve(SomeNgModule);
           expect(ngModule.declarations).toEqual([SomeDirective]);
         });

      it('should allow overriding the @NgModule', () => {
        ngModuleResolver.setNgModule(
            SomeNgModule, new NgModule({declarations: [SomeOtherDirective]}));
        const ngModule = ngModuleResolver.resolve(SomeNgModule);
        expect(ngModule.declarations).toEqual([SomeOtherDirective]);
      });
    });
  });

    describe('#10503', () => {
      let ngZone: NgZone;

      beforeEach(inject([NgZone], (_ngZone: NgZone) => {
        // Create a zone outside the fakeAsync.
        ngZone = _ngZone;
      }));

      it('should fakeAsync even if the NgZone was created outside.', fakeAsync(() => {
           let result: string = null !;
           // try to escape the current fakeAsync zone by using NgZone which was created outside.
           ngZone.run(() => {
             Promise.resolve('works').then((v) => result = v);
             flushMicrotasks();
           });
           expect(result).toEqual('works');
         }));

      describe('async', () => {
        let asyncResult: string;
        const waitLongerThenTestFrameworkAsyncTimeout = 5;

        beforeEach(() => { asyncResult = null !; });

        it('should async even if the NgZone was created outside.', async(() => {
             // try to escape the current async zone by using NgZone which was created outside.
             ngZone.run(() => {
               setTimeout(() => {
                 Promise.resolve('works').then((v) => asyncResult = v);
               }, waitLongerThenTestFrameworkAsyncTimeout);
             });
           }));

        afterEach(() => { expect(asyncResult).toEqual('works'); });

      });
    });

    describe('readPerfLog (common)', () => {

      it('should execute a dummy script before reading them',
         inject([AsyncTestCompleter], (async: AsyncTestCompleter) => {
           // TODO(tbosch): This seems to be a bug in ChromeDriver:
           // Sometimes it does not report the newest events of the performance log
           // to the WebDriver client unless a script is executed...
           createExtension([]).readPerfLog().then((_) => {
             expect(log).toEqual([['executeScript', '1+1'], ['logs', 'performance']]);
             async.done();
           });
         }));

      ['Rasterize', 'CompositeLayers'].forEach((recordType) => {
        it(`should report ${recordType} as "render"`,
           inject([AsyncTestCompleter], (async: AsyncTestCompleter) => {
             createExtension(
                 [
                   chromeTimelineEvents.start(recordType, 1234),
                   chromeTimelineEvents.end(recordType, 2345)
                 ], )
                 .readPerfLog()
                 .then((events) => {
                   expect(events).toEqual([
                     normEvents.start('render', 1.234),
                     normEvents.end('render', 2.345),
                   ]);
                   async.done();
                 });
           }));
      });

      describe('frame metrics', () => {
        it('should report ImplThreadRenderingStats as frame event',
           inject([AsyncTestCompleter], (async: AsyncTestCompleter) => {
             createExtension([benchmarkEvents.instant(
                                 'BenchmarkInstrumentation::ImplThreadRenderingStats', 1100,
                                 {'data': {'frame_count': 1}})])
                 .readPerfLog()
                 .then((events) => {
                   expect(events).toEqual([
                     normEvents.instant('frame', 1.1),
                   ]);
                   async.done();
                 });
           }));

        it('should not report ImplThreadRenderingStats with zero frames',
           inject([AsyncTestCompleter], (async: AsyncTestCompleter) => {
             createExtension([benchmarkEvents.instant(
                                 'BenchmarkInstrumentation::ImplThreadRenderingStats', 1100,
                                 {'data': {'frame_count': 0}})])
                 .readPerfLog()
                 .then((events) => {
                   expect(events).toEqual([]);
                   async.done();
                 });
           }));

        it('should throw when ImplThreadRenderingStats contains more than one frame',
           inject([AsyncTestCompleter], (async: AsyncTestCompleter) => {

             createExtension([benchmarkEvents.instant(
                                 'BenchmarkInstrumentation::ImplThreadRenderingStats', 1100,
                                 {'data': {'frame_count': 2}})])
                 .readPerfLog()
                 .catch((err): any => {
                   expect(() => {
                     throw err;
                   }).toThrowError('multi-frame render stats not supported');
                   async.done();
                 });
           }));

      });

      it('should report begin timestamps',
         inject([AsyncTestCompleter], (async: AsyncTestCompleter) => {
           createExtension([blinkEvents.create('S', 'someName', 1000)])
               .readPerfLog()
               .then((events) => {
                 expect(events).toEqual([normEvents.markStart('someName', 1.0)]);
                 async.done();
               });
         }));

      it('should report end timestamps',
         inject([AsyncTestCompleter], (async: AsyncTestCompleter) => {
           createExtension([blinkEvents.create('F', 'someName', 1000)])
               .readPerfLog()
               .then((events) => {
                 expect(events).toEqual([normEvents.markEnd('someName', 1.0)]);
                 async.done();
               });
         }));

      it('should throw an error on buffer overflow',
         inject([AsyncTestCompleter], (async: AsyncTestCompleter) => {

           createExtension(
//.........这里部分代码省略.........

  describe('EventEmitter', () => {
    let emitter: EventEmitter<any>;

    beforeEach(() => { emitter = new EventEmitter(); });

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

    it('should call the throw callback',
       inject([AsyncTestCompleter], (async: AsyncTestCompleter) => {
         emitter.subscribe({
           next: () => {},
           error: (error: any) => {
             expect(error).toEqual('Boom');
             async.done();
           }
         });
         emitter.error('Boom');
       }));

    it('should work when no throw callback is provided',
       inject([AsyncTestCompleter], (async: AsyncTestCompleter) => {
         emitter.subscribe({next: () => {}, error: (_: any) => { async.done(); }});
         emitter.error('Boom');
       }));

    it('should call the return callback',
       inject([AsyncTestCompleter], (async: AsyncTestCompleter) => {
         emitter.subscribe(
             {next: () => {}, error: (_: any) => {}, complete: () => { async.done(); }});
         emitter.complete();
       }));

    it('should subscribe to the wrapper synchronously', () => {
      let called = false;
      emitter.subscribe({next: (value: any) => { called = true; }});
      emitter.emit(99);

      expect(called).toBe(true);
    });

    it('delivers next and error events synchronously',
       inject([AsyncTestCompleter], (async: AsyncTestCompleter) => {
         const log: any[] /** TODO #9100 */ = [];

         emitter.subscribe({
           next: (x: any) => {
             log.push(x);
             expect(log).toEqual([1, 2]);
           },
           error: (err: any) => {
             log.push(err);
             expect(log).toEqual([1, 2, 3, 4]);
             async.done();
           }
         });
         log.push(1);
         emitter.emit(2);
         log.push(3);
         emitter.error(4);
         log.push(5);
       }));

    it('delivers next and complete events synchronously', () => {
      const log: any[] /** TODO #9100 */ = [];

      emitter.subscribe({
        next: (x: any) => {
          log.push(x);
          expect(log).toEqual([1, 2]);
        },
        error: null,
        complete: () => {
          log.push(4);
          expect(log).toEqual([1, 2, 3, 4]);
        }
      });
      log.push(1);
      emitter.emit(2);
      log.push(3);
      emitter.complete();
      log.push(5);
      expect(log).toEqual([1, 2, 3, 4, 5]);
    });

    it('delivers events asynchronously when forced to async mode',
       inject([AsyncTestCompleter], (async: AsyncTestCompleter) => {
         const e = new EventEmitter(true);
         const log: any[] /** TODO #9100 */ = [];
         e.subscribe((x: any) => {
           log.push(x);
           expect(log).toEqual([1, 3, 2]);
//.........这里部分代码省略.........

    describe('valueChanges', () => {
      let a: FormArray;
      let c1: any /** TODO #9100 */, c2: any /** TODO #9100 */;

      beforeEach(() => {
        c1 = new FormControl('old1');
        c2 = new FormControl('old2');
        a = new FormArray([c1, c2]);
      });

      it('should fire an event after the value has been updated',
         inject([AsyncTestCompleter], (async: AsyncTestCompleter) => {
           a.valueChanges.subscribe({
             next: (value: any) => {
               expect(a.value).toEqual(['new1', 'old2']);
               expect(value).toEqual(['new1', 'old2']);
               async.done();
             }
           });
           c1.setValue('new1');
         }));

      it('should fire an event after the control\'s observable fired an event',
         inject([AsyncTestCompleter], (async: AsyncTestCompleter) => {
           let controlCallbackIsCalled = false;


           c1.valueChanges.subscribe({next: (value: any) => { controlCallbackIsCalled = true; }});

           a.valueChanges.subscribe({
             next: (value: any) => {
               expect(controlCallbackIsCalled).toBe(true);
               async.done();
             }
           });

           c1.setValue('new1');
         }));

      it('should fire an event when a control is removed',
         inject([AsyncTestCompleter], (async: AsyncTestCompleter) => {
           a.valueChanges.subscribe({
             next: (value: any) => {
               expect(value).toEqual(['old1']);
               async.done();
             }
           });

           a.removeAt(1);
         }));

      it('should fire an event when a control is added',
         inject([AsyncTestCompleter], (async: AsyncTestCompleter) => {
           a.removeAt(1);

           a.valueChanges.subscribe({
             next: (value: any) => {
               expect(value).toEqual(['old1', 'old2']);
               async.done();
             }
           });

           a.push(c2);
         }));
    });

  describe('MockResourceLoader', () => {
    let resourceLoader: MockResourceLoader;

    beforeEach(() => { resourceLoader = new MockResourceLoader(); });

    function expectResponse(
        request: Promise<string>, url: string, response: string, done: () => void = null) {
      function onResponse(text: string): string {
        if (response === null) {
          throw `Unexpected response ${url} -> ${text}`;
        } else {
          expect(text).toEqual(response);
          if (done != null) done();
        }
        return text;
      }

      function onError(error: string): string {
        if (response !== null) {
          throw `Unexpected error ${url}`;
        } else {
          expect(error).toEqual(`Failed to load ${url}`);
          if (done != null) done();
        }
        return error;
      }

      request.then(onResponse, onError);
    }

    it('should return a response from the definitions',
       inject([AsyncTestCompleter], (async: AsyncTestCompleter) => {
         const url = '/foo';
         const response = 'bar';
         resourceLoader.when(url, response);
         expectResponse(resourceLoader.get(url), url, response, () => async.done());
         resourceLoader.flush();
       }));

    it('should return an error from the definitions',
       inject([AsyncTestCompleter], (async: AsyncTestCompleter) => {
         const url = '/foo';
         const response: string = null;
         resourceLoader.when(url, response);
         expectResponse(resourceLoader.get(url), url, response, () => async.done());
         resourceLoader.flush();
       }));

    it('should return a response from the expectations',
       inject([AsyncTestCompleter], (async: AsyncTestCompleter) => {
         const url = '/foo';
         const response = 'bar';
         resourceLoader.expect(url, response);
         expectResponse(resourceLoader.get(url), url, response, () => async.done());
         resourceLoader.flush();
       }));

    it('should return an error from the expectations',
       inject([AsyncTestCompleter], (async: AsyncTestCompleter) => {
         const url = '/foo';
         const response: string = null;
         resourceLoader.expect(url, response);
         expectResponse(resourceLoader.get(url), url, response, () => async.done());
         resourceLoader.flush();
       }));

    it('should not reuse expectations', () => {
      const url = '/foo';
      const response = 'bar';
      resourceLoader.expect(url, response);
      resourceLoader.get(url);
      resourceLoader.get(url);
      expect(() => { resourceLoader.flush(); }).toThrowError('Unexpected request /foo');
    });

    it('should return expectations before definitions',
       inject([AsyncTestCompleter], (async: AsyncTestCompleter) => {
         const url = '/foo';
         resourceLoader.when(url, 'when');
         resourceLoader.expect(url, 'expect');
         expectResponse(resourceLoader.get(url), url, 'expect');
         expectResponse(resourceLoader.get(url), url, 'when', () => async.done());
         resourceLoader.flush();
       }));

    it('should throw when there is no definitions or expectations', () => {
      resourceLoader.get('/foo');
      expect(() => { resourceLoader.flush(); }).toThrowError('Unexpected request /foo');
    });

    it('should throw when flush is called without any pending requests', () => {
      expect(() => { resourceLoader.flush(); }).toThrowError('No pending requests to flush');
    });

    it('should throw on unsatisfied expectations', () => {
      resourceLoader.expect('/foo', 'bar');
      resourceLoader.when('/bar', 'foo');
      resourceLoader.get('/bar');
      expect(() => { resourceLoader.flush(); }).toThrowError('Unsatisfied requests: /foo');
    });
//.........这里部分代码省略.........

  describe('MockBackend', () => {

    let backend: MockBackend;
    let sampleRequest1: Request;
    let sampleResponse1: Response;
    let sampleRequest2: Request;
    let sampleResponse2: Response;

    beforeEach(() => {
      const injector = Injector.create([
        {provide: ResponseOptions, useClass: BaseResponseOptions, deps: []},
        {provide: MockBackend, deps: []}
      ]);
      backend = injector.get(MockBackend);
      const base = new BaseRequestOptions();
      sampleRequest1 =
          new Request(base.merge(new RequestOptions({url: 'https://google.com'})) as any);
      sampleResponse1 = new Response(new ResponseOptions({body: 'response1'}));
      sampleRequest2 =
          new Request(base.merge(new RequestOptions({url: 'https://google.com'})) as any);
      sampleResponse2 = new Response(new ResponseOptions({body: 'response2'}));
    });

    it('should create a new MockBackend', () => { expect(backend).toBeAnInstanceOf(MockBackend); });

    it('should create a new MockConnection', () => {
      expect(backend.createConnection(sampleRequest1)).toBeAnInstanceOf(MockConnection);
    });

    it('should create a new connection and allow subscription', () => {
      const connection: MockConnection = backend.createConnection(sampleRequest1);
      connection.response.subscribe(() => {});
    });

    it('should allow responding after subscription',
       inject([AsyncTestCompleter], (async: AsyncTestCompleter) => {
         const connection: MockConnection = backend.createConnection(sampleRequest1);
         connection.response.subscribe(() => { async.done(); });
         connection.mockRespond(sampleResponse1);
       }));

    it('should allow subscribing after responding',
       inject([AsyncTestCompleter], (async: AsyncTestCompleter) => {
         const connection: MockConnection = backend.createConnection(sampleRequest1);
         connection.mockRespond(sampleResponse1);
         connection.response.subscribe(() => { async.done(); });
       }));

    it('should allow responding after subscription with an error',
       inject([AsyncTestCompleter], (async: AsyncTestCompleter) => {
         const connection: MockConnection = backend.createConnection(sampleRequest1);
         connection.response.subscribe(null !, () => { async.done(); });
         connection.mockError(new Error('nope'));
       }));

    it('should not throw when there are no unresolved requests',
       inject([AsyncTestCompleter], (async: AsyncTestCompleter) => {
         const connection: MockConnection = backend.createConnection(sampleRequest1);
         connection.response.subscribe(() => { async.done(); });
         connection.mockRespond(sampleResponse1);
         backend.verifyNoPendingRequests();
       }));

    xit('should throw when there are unresolved requests',
        inject([AsyncTestCompleter], (async: AsyncTestCompleter) => {
          const connection: MockConnection = backend.createConnection(sampleRequest1);
          connection.response.subscribe(() => { async.done(); });
          backend.verifyNoPendingRequests();
        }));

    it('should work when requests are resolved out of order',
       inject([AsyncTestCompleter], (async: AsyncTestCompleter) => {
         const connection1: MockConnection = backend.createConnection(sampleRequest1);
         const connection2: MockConnection = backend.createConnection(sampleRequest1);
         connection1.response.subscribe(() => { async.done(); });
         connection2.response.subscribe(() => {});
         connection2.mockRespond(sampleResponse1);
         connection1.mockRespond(sampleResponse1);
         backend.verifyNoPendingRequests();
       }));

    xit('should allow double subscribing',
        inject([AsyncTestCompleter], (async: AsyncTestCompleter) => {
          const responses: Response[] = [sampleResponse1, sampleResponse2];
          backend.connections.subscribe((c: MockConnection) => c.mockRespond(responses.shift() !));
          const responseObservable: ReplaySubject<Response> =
              backend.createConnection(sampleRequest1).response;
          responseObservable.subscribe(res => expect(res.text()).toBe('response1'));
          responseObservable.subscribe(
              res => expect(res.text()).toBe('response2'), null !, async.done);
        }));

    // TODO(robwormald): readyStates are leaving?
    it('should allow resolution of requests manually', () => {
      const connection1: MockConnection = backend.createConnection(sampleRequest1);
      const connection2: MockConnection = backend.createConnection(sampleRequest1);
      connection1.response.subscribe(() => {});
      connection2.response.subscribe(() => {});
      backend.resolveAllConnections();
      backend.verifyNoPendingRequests();
//.........这里部分代码省略.........