feat(core): add more debug APIs to inspect the application form a browser

Adds `window.getAllAngularRootElements()`
Adds `ng.coreTokens.ApplicationRef`
Adds `ng.coreTokens.Ngzone`

Closes #7045
Closes #7161

modules/angular2/src/core/testability/testability.ts

@@ -118,6 +118,8 @@ export class TestabilityRegistry {
 
   getAllTestabilities(): Testability[] { return MapWrapper.values(this._applications); }
 
+  getAllRootElements(): any[] { return MapWrapper.keys(this._applications); }
+
   findTestabilityInTree(elem: Node, findInAncestors: boolean = true): Testability {
     return _testabilityGetter.findTestabilityInTree(this, elem, findInAncestors);
   }

modules/angular2/src/facade/lang.ts

@@ -24,6 +24,7 @@ export interface BrowserNodeGlobal {
   Zone: ZoneLikeConstructor;
   getAngularTestability: Function;
   getAllAngularTestabilities: Function;
+  getAllAngularRootElements: Function;
   frameworkStabilizers: Array<Function>;
   setTimeout: Function;
   clearTimeout: Function;

modules/angular2/src/platform/browser/testability.ts

@@ -49,6 +49,8 @@ export class BrowserGetTestability implements GetTestability {
       return testabilities.map((testability) => { return new PublicTestability(testability); });
     };
 
+    global.getAllAngularRootElements = () => registry.getAllRootElements();
+
     var whenAllStable = (callback) => {
       var testabilities = global.getAllAngularTestabilities();
       var count = testabilities.length;

modules/angular2/src/platform/dom/debug/ng_probe.ts

@@ -3,11 +3,13 @@ import {Injectable, provide, Provider} from 'angular2/src/core/di';
 import {DOM} from 'angular2/src/platform/dom/dom_adapter';
 import {DebugNode, getDebugNode} from 'angular2/src/core/debug/debug_node';
 import {DomRootRenderer} from 'angular2/src/platform/dom/dom_renderer';
-import {RootRenderer} from 'angular2/core';
+import {RootRenderer, NgZone, ApplicationRef} from 'angular2/core';
 import {DebugDomRootRenderer} from 'angular2/src/core/debug/debug_renderer';
 
+const CORE_TOKENS = CONST_EXPR({'ApplicationRef': ApplicationRef, 'NgZone': NgZone});
 
 const INSPECT_GLOBAL_NAME = 'ng.probe';
+const CORE_TOKENS_GLOBAL_NAME = 'ng.coreTokens';
 
 /**
  * Returns a {@link DebugElement} for the given native DOM element, or
@@ -27,6 +29,7 @@ function _createConditionalRootRenderer(rootRenderer) {
 
 function _createRootRenderer(rootRenderer) {
   DOM.setGlobalVar(INSPECT_GLOBAL_NAME, inspectNativeElement);
+  DOM.setGlobalVar(CORE_TOKENS_GLOBAL_NAME, CORE_TOKENS);
   return new DebugDomRootRenderer(rootRenderer);
 }
 

modules/angular2/test/public_api_spec.ts

@@ -1308,6 +1308,7 @@ var NG_CORE = [
   'TestabilityRegistry',
   'TestabilityRegistry.findTestabilityInTree()',
   'TestabilityRegistry.getAllTestabilities()',
+  'TestabilityRegistry.getAllRootElements()',
   'TestabilityRegistry.getTestability()',
   'TestabilityRegistry.registerApplication()',
   'GetTestability:dart',

tools/public_api_guard/public_api_spec.ts

@@ -440,6 +440,7 @@ const CORE = [
   'TestabilityRegistry.constructor()',
   'TestabilityRegistry.findTestabilityInTree(elem:Node, findInAncestors:boolean):Testability',
   'TestabilityRegistry.getAllTestabilities():Testability[]',
+  'TestabilityRegistry.getAllRootElements():any[]',
   'TestabilityRegistry.getTestability(elem:any):Testability',
   'TestabilityRegistry.registerApplication(token:any, testability:Testability):any',
   'TrackByFn',