fix(patch): Worker should patch onProperties (#915)

lib/browser/property-descriptor.ts

@@ -228,6 +228,7 @@ const XMLHttpRequestEventNames = [
 const IDBIndexEventNames =
     ['upgradeneeded', 'complete', 'abort', 'success', 'error', 'blocked', 'versionchange', 'close'];
 const websocketEventNames = ['close', 'error', 'open', 'message'];
+const workerEventNames = ['error', 'message'];
 
 export const eventNames = globalEventHandlersEventNames.concat(
     webglEventNames, formEventNames, detailEventNames, documentEventNames, windowEventNames,
@@ -295,6 +296,10 @@ export function propertyDescriptorPatch(api: _ZonePrivate, _global: any) {
       if (HTMLMarqueeElement) {
         patchFilteredProperties(HTMLMarqueeElement.prototype, marqueeEventNames, ignoreProperties);
       }
+      const Worker = (window as any)['Worker'];
+      if (Worker) {
+        patchFilteredProperties(Worker.prototype, workerEventNames, ignoreProperties);
+      }
     }
     patchFilteredProperties(XMLHttpRequest.prototype, XMLHttpRequestEventNames, ignoreProperties);
     const XMLHttpRequestEventTarget = _global['XMLHttpRequestEventTarget'];

test/assets/worker.js

@@ -0,0 +1,8 @@
+/**
+ * @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
+ */
+postMessage('worker');

test/browser/Worker.spec.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 {zoneSymbol} from '../../lib/common/utils';
+import {asyncTest, ifEnvSupports} from '../test-util';
+
+function workerSupport() {
+  const Worker = (window as any)['Worker'];
+  if (!Worker) {
+    return false;
+  }
+  const desc = Object.getOwnPropertyDescriptor(Worker.prototype, 'onmessage');
+  if (!desc || !desc.configurable) {
+    return false;
+  }
+  return true;
+}
+
+(workerSupport as any).message = 'Worker Support';
+
+describe('Worker API', ifEnvSupports(workerSupport, function() {
+           it('Worker API should be patched by Zone', asyncTest((done: Function) => {
+                const zone: Zone = Zone.current.fork({name: 'worker'});
+                zone.run(() => {
+                  const worker = new Worker('/base/test/assets/worker.js');
+                  worker.onmessage = function(evt: MessageEvent) {
+                    expect(evt.data).toEqual('worker');
+                    expect(Zone.current.name).toEqual('worker');
+                    done();
+                  };
+                });
+              }, Zone.root));
+         }));

test/browser_entry_point.ts

@@ -21,6 +21,7 @@ import './browser/WebSocket.spec';
 import './browser/XMLHttpRequest.spec';
 import './browser/MediaQuery.spec';
 import './browser/Notification.spec';
+import './browser/Worker.spec';
 import './mocha-patch.spec';
 import './jasmine-patch.spec';
 import './extra/cordova.spec';