fix(events): provide the ability to register global hammer.js events

closes #12797

modules/@angular/platform-browser/test/dom/events/hammer_gestures_spec.ts

@@ -0,0 +1,22 @@
+/**
+ * @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 {describe, expect, it} from '@angular/core/testing/testing_internal';
+import {HammerGestureConfig, HammerGesturesPlugin} from '@angular/platform-browser/src/dom/events/hammer_gestures';
+
+export function main() {
+  describe('HammerGesturesPlugin', () => {
+
+    it('should implement addGlobalEventListener', () => {
+      const plugin = new HammerGesturesPlugin(new HammerGestureConfig());
+
+      spyOn(plugin, 'addEventListener').and.callFake(() => {});
+
+      expect(() => plugin.addGlobalEventListener('document', 'swipe', () => {})).not.toThrowError();
+    });
+  });
+}

modules/@angular/platform-browser/test/dom/events/key_events_spec.ts

@@ -10,7 +10,7 @@ import {describe, expect, it} from '@angular/core/testing/testing_internal';
 import {KeyEventsPlugin} from '@angular/platform-browser/src/dom/events/key_events';
 
 export function main() {
-  describe('KeyEvents', () => {
+  describe('KeyEventsPlugin', () => {
 
     it('should ignore unrecognized events', () => {
       expect(KeyEventsPlugin.parseEventName('keydown')).toEqual(null);
@@ -58,5 +58,14 @@ export function main() {
           .toEqual(KeyEventsPlugin.parseEventName('keyup.control.escape'));
     });
 
+    it('should implement addGlobalEventListener', () => {
+      const plugin = new KeyEventsPlugin();
+
+      spyOn(plugin, 'addEventListener').and.callFake(() => {});
+
+      expect(() => plugin.addGlobalEventListener('window', 'keyup.control.esc', () => {}))
+          .not.toThrowError();
+    });
+
   });
 }