for fixup - keep RootTestComponent around, but deprecate

modules/angular2/src/testing/test_component_builder.ts

@@ -22,13 +22,21 @@ import {DOM} from 'angular2/src/core/dom/dom_adapter';
 
 import {DebugElement, DebugElement_} from 'angular2/src/core/debug/debug_element';
 
-export abstract class ComponentFixture {
+
+/**
+ * @deprecated Use ComponentFixture
+ */
+export abstract class RootTestComponent {
   debugElement: DebugElement;
 
   abstract detectChanges(): void;
   abstract destroy(): void;
 }
 
+
+export abstract class ComponentFixture extends RootTestComponent {}
+
+
 export class ComponentFixture_ extends ComponentFixture {
   /** @internal */
   _componentRef: ComponentRef;

modules/angular2/testing.ts

@@ -7,6 +7,10 @@
  *
  */
 export * from './src/testing/testing';
-export {ComponentFixture, TestComponentBuilder} from './src/testing/test_component_builder';
+export {
+  ComponentFixture,
+  RootTestComponent,
+  TestComponentBuilder
+} from './src/testing/test_component_builder';
 export * from './src/testing/test_injector';
 export * from './src/testing/fake_async';