export function createInjector(zone: NgZone, bus: MessageBus): Injector {
  BrowserDomAdapter.makeCurrent();
  _rootBindings.push(bind(NgZone).toValue(zone));
  _rootBindings.push(bind(MessageBus).toValue(bus));
  var injector: Injector = Injector.resolveAndCreate(_rootBindings);
  return injector.resolveAndCreateChild(_injectorBindings());
}

export function createInjector(zone: NgZone, bus: MessageBus): Injector {
  BrowserDomAdapter.makeCurrent();
  _rootProviders.push(provide(NgZone, {useValue: zone}));
  _rootProviders.push(provide(MessageBus, {useValue: bus}));
  var injector: Injector = Injector.resolveAndCreate(_rootProviders);
  return injector.resolveAndCreateChild(_injectorProviders());
}

export function initializeGenericWorkerRenderer(injector: Injector) {
  var bus = injector.get(MessageBus);
  let zone = injector.get(NgZone);
  bus.attachToZone(zone);

  zone.run(() => {
    WORKER_RENDER_MESSAGING_PROVIDERS.forEach((token) => { injector.get(token).start(); });
  });
}

function initWebWorkerApplication(injector: Injector): void {
  var scriptUri: string;
  try {
    scriptUri = injector.get(WORKER_SCRIPT);
  } catch (e) {
    throw new BaseException(
        "You must provide your WebWorker's initialization script with the WORKER_SCRIPT token");
  }

  let instance = injector.get(WebWorkerInstance);
  spawnWebWorker(scriptUri, instance);

  initializeGenericWorkerRenderer(injector);
}

 /**
  * Creates a new component.
  */
 create(injector: Injector, projectableNodes: any[][] = null,
        rootSelectorOrNode: string | any = null): ComponentRef {
   var vu: ViewUtils = injector.get(ViewUtils);
   if (isBlank(projectableNodes)) {
     projectableNodes = [];
   }
   // Note: Host views don't need a declarationAppElement!
   var hostView = this._viewFactory(vu, injector, null);
   var hostElement = hostView.create(EMPTY_CONTEXT, projectableNodes, rootSelectorOrNode);
   return new ComponentRef_(hostElement, this._componentType);
 }

  hydrateViewInContainer(parentView: viewModule.AppView, boundElementIndex: number,
                         contextView: viewModule.AppView, contextBoundElementIndex: number,
                         index: number, imperativelyCreatedProviders: ResolvedProvider[]) {
    if (isBlank(contextView)) {
      contextView = parentView;
      contextBoundElementIndex = boundElementIndex;
    }
    var viewContainer = parentView.viewContainers[boundElementIndex];
    var view = viewContainer.views[index];
    var elementInjector = contextView.elementInjectors[contextBoundElementIndex];

    var injector = isPresent(imperativelyCreatedProviders) ?
                       Injector.fromResolvedProviders(imperativelyCreatedProviders) :
                       null;
    this._hydrateView(view, injector, elementInjector.getHost(), contextView.context,
                      contextView.locals);
  }

        .then((args) => {
          var capabilities = args[0];
          var userAgent = args[1];

          // This might still create instances twice. We are creating a new injector with all the
          // providers.
          // Only WebDriverAdapter is reused.
          // TODO vsavkin consider changing it when toAsyncFactory is added back or when child
          // injectors are handled better.
          var injector = Injector.resolveAndCreate([
            sampleBindings, bind(Options.CAPABILITIES).toValue(capabilities),
            bind(Options.USER_AGENT).toValue(userAgent),
            provide(WebDriverAdapter, {useValue: adapter})
          ]);

          var sampler = injector.get(Sampler);
          return sampler.sample();
        });

  sample({id, execute, prepare, microMetrics, bindings}:
             {id: string, execute?: any, prepare?: any, microMetrics?: any, bindings?: any}):
      Promise<SampleState> {
    var sampleBindings = [
      _DEFAULT_PROVIDERS,
      this._defaultBindings,
      bind(Options.SAMPLE_ID).toValue(id),
      bind(Options.EXECUTE).toValue(execute)
    ];
    if (isPresent(prepare)) {
      sampleBindings.push(bind(Options.PREPARE).toValue(prepare));
    }
    if (isPresent(microMetrics)) {
      sampleBindings.push(bind(Options.MICRO_METRICS).toValue(microMetrics));
    }
    if (isPresent(bindings)) {
      sampleBindings.push(bindings);
    }

    var inj = Injector.resolveAndCreate(sampleBindings);
    var adapter = inj.get(WebDriverAdapter);

    return PromiseWrapper
        .all([adapter.capabilities(), adapter.executeScript('return window.navigator.userAgent;')])
        .then((args) => {
          var capabilities = args[0];
          var userAgent = args[1];

          // This might still create instances twice. We are creating a new injector with all the
          // providers.
          // Only WebDriverAdapter is reused.
          // TODO vsavkin consider changing it when toAsyncFactory is added back or when child
          // injectors are handled better.
          var injector = Injector.resolveAndCreate([
            sampleBindings,
            bind(Options.CAPABILITIES).toValue(capabilities),
            bind(Options.USER_AGENT).toValue(userAgent),
            provide(WebDriverAdapter, {useValue: adapter})
          ]);

          var sampler = injector.get(Sampler);
          return sampler.sample();
        });
  }

export function createTestInjector(bindings: Array<Type | Binding | any[]>): Injector {
  var rootInjector = Injector.resolveAndCreate(_getRootBindings());
  return rootInjector.resolveAndCreateChild(ListWrapper.concat(_getAppBindings(), bindings));
}

 var params = ListWrapper.map(this._tokens, (t) => injector.get(t));