From 8a27abae896de3c4d94c407e8bb381e099d2d7f7 Mon Sep 17 00:00:00 2001
From: Chris Chua <chris@thousandeyes.com>
Date: Sat, 25 Jan 2014 11:43:16 -0800
Subject: [PATCH] fix(jqLite): triggerHandler support unbind self

Fixes .one if the event is invoked from triggerHandler.

Closes #5984
---
 src/jqLite.js      |  6 ++++--
 test/jqLiteSpec.js | 20 ++++++++++++++++++++
 2 files changed, 24 insertions(+), 2 deletions(-)

diff --git a/src/jqLite.js b/src/jqLite.js
index 9d342bfb..1fe2e4a0 100644
--- a/src/jqLite.js
+++ b/src/jqLite.js
@@ -948,7 +948,9 @@ forEach({
   clone: jqLiteClone,
 
   triggerHandler: function(element, eventName, eventData) {
-    var eventFns = (jqLiteExpandoStore(element, 'events') || {})[eventName];
+    // Copy event handlers in case event handlers array is modified during execution.
+    var eventFns = (jqLiteExpandoStore(element, 'events') || {})[eventName],
+        eventFnsCopy = shallowCopy(eventFns || []);
 
     eventData = eventData || [];
 
@@ -962,7 +964,7 @@ forEach({
       stopPropagation: noop
     }];
 
-    forEach(eventFns, function(fn) {
+    forEach(eventFnsCopy, function(fn) {
       fn.apply(element, event.concat(eventData));
     });
   }
diff --git a/test/jqLiteSpec.js b/test/jqLiteSpec.js
index 3124b47a..942e0ead 100644
--- a/test/jqLiteSpec.js
+++ b/test/jqLiteSpec.js
@@ -1743,6 +1743,26 @@ describe('jqLite', function() {
       event.preventDefault();
       expect(event.isDefaultPrevented()).toBe(true);
     });
+
+
+    it('should support handlers that deregister themselves', function() {
+      var element = jqLite('<a>poke</a>'),
+          clickSpy = jasmine.createSpy('click'),
+          clickOnceSpy = jasmine.createSpy('clickOnce').andCallFake(function() {
+            element.off('click', clickOnceSpy);
+          });
+
+      element.on('click', clickOnceSpy);
+      element.on('click', clickSpy);
+
+      element.triggerHandler('click');
+      expect(clickOnceSpy).toHaveBeenCalledOnce();
+      expect(clickSpy).toHaveBeenCalledOnce();
+
+      element.triggerHandler('click');
+      expect(clickOnceSpy).toHaveBeenCalledOnce();
+      expect(clickSpy.callCount).toBe(2);
+    });
   });