fix(ivy): ensure that `window.ng` utilities are published when NgModules are used (#32725)

Prior to this patch if any backwards-compatible Angular code was using
Ivy then the built-in `window.ng` debug utilies would not be exposed.

PR Close #32725

packages/core/src/application_ref.ts

@@ -8,6 +8,7 @@
 
 import {Observable, Observer, Subscription, merge} from 'rxjs';
 import {share} from 'rxjs/operators';
+
 import {ApplicationInitStatus} from './application_init';
 import {APP_BOOTSTRAP_LISTENER, PLATFORM_INITIALIZER} from './application_tokens';
 import {getCompilerFacade} from './compiler/compiler_facade';
@@ -30,6 +31,7 @@ import {assertNgModuleType} from './render3/assert';
 import {ComponentFactory as R3ComponentFactory} from './render3/component_ref';
 import {setLocaleId} from './render3/i18n';
 import {NgModuleFactory as R3NgModuleFactory} from './render3/ng_module_ref';
+import {publishDefaultGlobalUtils as _publishDefaultGlobalUtils} from './render3/util/global_utils';
 import {Testability, TestabilityRegistry} from './testability/testability';
 import {isDevMode} from './util/is_dev_mode';
 import {isPromise} from './util/lang';
@@ -81,6 +83,16 @@ export function compileNgModuleFactory__POST_R3__<M>(
       .then(() => moduleFactory);
 }
 
+// the `window.ng` global utilities are only available in non-VE versions of
+// Angular. The function switch below will make sure that the code is not
+// included into Angular when PRE mode is active.
+export function publishDefaultGlobalUtils__PRE_R3__() {}
+export function publishDefaultGlobalUtils__POST_R3__() {
+  ngDevMode && _publishDefaultGlobalUtils();
+}
+
+let publishDefaultGlobalUtils: () => any = publishDefaultGlobalUtils__PRE_R3__;
+
 let isBoundToModule: <C>(cf: ComponentFactory<C>) => boolean = isBoundToModule__PRE_R3__;
 
 export function isBoundToModule__PRE_R3__<C>(cf: ComponentFactory<C>): boolean {
@@ -116,6 +128,7 @@ export function createPlatform(injector: Injector): PlatformRef {
     throw new Error(
         'There can be only one platform. Destroy the previous one to create a new one.');
   }
+  publishDefaultGlobalUtils();
   _platform = injector.get(PlatformRef);
   const inits = injector.get(PLATFORM_INITIALIZER, null);
   if (inits) inits.forEach((init: any) => init());

packages/core/test/application_ref_integration_spec.ts

@@ -10,7 +10,6 @@ import {ApplicationRef, Component, DoCheck, NgModule, OnInit, TestabilityRegistr
 import {getTestBed} from '@angular/core/testing';
 import {BrowserModule} from '@angular/platform-browser';
 import {withBody} from '@angular/private/testing';
-
 import {NgModuleFactory} from '../src/render3/ng_module_ref';
 
 ivyEnabled && describe('ApplicationRef bootstrap', () => {
@@ -58,4 +57,13 @@ ivyEnabled && describe('ApplicationRef bootstrap', () => {
        registry.unregisterAllApplications();
      }));
 
+  it('should expose the `window.ng` global utilities',
+     withBody('<hello-world></hello-world>', async() => {
+       const MyAppModuleFactory = new NgModuleFactory(MyAppModule);
+       const moduleRef =
+           await getTestBed().platform.bootstrapModuleFactory(MyAppModuleFactory, {ngZone: 'noop'});
+
+       const ngUtils = (global as any).ng;
+       expect(ngUtils.getComponent).toBeTruthy();
+     }));
 });