fix(error): fix #618, ZoneAwareError should copy Error's static propeties

Author: JiaLiPassion

karma-build.conf.js

@@ -9,6 +9,7 @@
 module.exports = function (config) {
   require('./karma-base.conf.js')(config);
   config.files.push('build/test/wtf_mock.js');
+  config.files.push('build/test/custom_error.js');
   config.files.push('build/lib/zone.js');
   config.files.push('build/test/main.js');
 };

lib/zone.ts

@@ -1744,6 +1744,25 @@ const Zone: ZoneType = (function(global: any) {
   ZoneAwareError[Zone.__symbol__('blacklistedStackFrames')] = blackListedStackFrames;
   ZoneAwareError[stackRewrite] = false;
 
+  // those properties need special handling
+  const specialPropertyNames = ['stackTraceLimit', 'captureStackTrace', 'prepareStackTrace'];
+  // those properties of NativeError should be set to ZoneAwareError
+  const nativeErrorProperties = Object.keys(NativeError);
+  if (nativeErrorProperties) {
+    nativeErrorProperties.forEach(prop => {
+      if (specialPropertyNames.filter(sp => sp === prop).length === 0) {
+        Object.defineProperty(ZoneAwareError, prop, {
+          get: function() {
+            return NativeError[prop];
+          },
+          set: function(value) {
+            NativeError[prop] = value;
+          }
+        });
+      }
+    });
+  }
+
   if (NativeError.hasOwnProperty('stackTraceLimit')) {
     // Extend default stack limit as we will be removing few frames.
     NativeError.stackTraceLimit = Math.max(NativeError.stackTraceLimit, 15);

test/common/Error.spec.ts

@@ -157,6 +157,18 @@ describe('ZoneAwareError', () => {
     expect(error1.message).toEqual('test new error message');
   });
 
+  it('should copy customized NativeError properties to ZoneAwareError', () => {
+    const spy = jasmine.createSpy('errorCustomFunction');
+    const NativeError = global[Zone['__symbol__']('Error')];
+    NativeError.customFunction = function(args) {
+      spy(args);
+    };
+    expect(Error['customProperty']).toBe('customProperty');
+    expect(typeof Error['customFunction']).toBe('function');
+    Error['customFunction']('test');
+    expect(spy).toHaveBeenCalledWith('test');
+  });
+
   it('should show zone names in stack frames and remove extra frames', () => {
     const rootZone = getRootZone();
     const innerZone = rootZone.fork({name: 'InnerZone'});

test/custom_error.ts

@@ -0,0 +1,14 @@
+/**
+ * @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
+ */
+
+'use strict';
+(function(global) {
+  const NativeError = global['Error'];
+  NativeError.customProperty = 'customProperty';
+  NativeError.customFunction = function() {};
+})(typeof window === 'object' && window || typeof self === 'object' && self || global);

test/node_entry_point.ts

@@ -8,6 +8,7 @@
 
 // Must be loaded before zone loads, so that zone can detect WTF.
 import './wtf_mock';
+import './custom_error';
 
 // Setup tests for Zone without microtask support
 import '../lib/zone';