refactor: move angular source to /packages rather than modules/@angular

packages/examples/testing/ts/fake_async.ts

@@ -0,0 +1,38 @@
+/**
+ * @license
+ * Copyright Google Inc. All Rights Reserved.
+ *
+ * Use of this source code is governed by an MIT-style license that can be
+ * found in the LICENSE file at https://angular.io/license
+ */
+
+import {discardPeriodicTasks, fakeAsync, tick} from '@angular/core/testing';
+
+
+// #docregion basic
+describe('this test', () => {
+  it('looks async but is synchronous', <any>fakeAsync((): void => {
+       let flag = false;
+       setTimeout(() => { flag = true; }, 100);
+       expect(flag).toBe(false);
+       tick(50);
+       expect(flag).toBe(false);
+       tick(50);
+       expect(flag).toBe(true);
+     }));
+});
+// #enddocregion
+
+// #docregion pending
+describe('this test', () => {
+  it('aborts a periodic timer', <any>fakeAsync((): void => {
+       // This timer is scheduled but doesn't need to complete for the
+       // test to pass (maybe it's a timeout for some operation).
+       // Leaving it will cause the test to fail...
+       setInterval(() => {}, 100);
+
+       // Unless we clean it up first.
+       discardPeriodicTasks();
+     }));
+});
+// #enddocregion