feat(jqLite): add support for unbind()

supports these invocation types:

- foo.unbind();
- foo.unbind('eventType');
- foo.unbind('eventType', fn);

more info: http://api.jquery.com/unbind/

src/jqLite.js

@@ -37,6 +37,7 @@
  * - [clone()](http://api.jquery.com/clone/)
  * - [css()](http://api.jquery.com/css/)
  * - [data()](http://api.jquery.com/data/)
+ * - [eq()](http://api.jquery.com/eq/)
  * - [hasClass()](http://api.jquery.com/hasClass/)
  * - [parent()](http://api.jquery.com/parent/)
  * - [remove()](http://api.jquery.com/remove/)
@@ -46,7 +47,7 @@
  * - [replaceWith()](http://api.jquery.com/replaceWith/)
  * - [text()](http://api.jquery.com/text/)
  * - [trigger()](http://api.jquery.com/trigger/)
- * - [eq()](http://api.jquery.com/eq/)
+ * - [unbind()](http://api.jquery.com/unbind/)
  *
  * ## In addtion to the above, Angular privides an additional method to both jQuery and jQuery lite:
  *
@@ -401,6 +402,25 @@ forEach({
     });
   },
 
+  unbind: function(element, type, fn) {
+    var bind = JQLiteData(element, 'bind');
+    if (!bind) return; //no listeners registered
+
+    if (isUndefined(type)) {
+      forEach(bind, function(eventHandler, type) {
+        removeEventListenerFn(element, type, eventHandler);
+        delete bind[type];
+      });
+    } else {
+      if (isUndefined(fn)) {
+        removeEventListenerFn(element, type, bind[type]);
+        delete bind[type];
+      } else {
+        angularArray.remove(bind[type].fns, fn);
+      }
+    }
+  },
+
   replaceWith: function(element, replaceNode) {
     var index, parent = element.parentNode;
     JQLiteDealoc(element);

test/jqLiteSpec.js

@@ -450,6 +450,102 @@ describe('jqLite', function(){
   });
 
 
+  describe('unbind', function() {
+    it('should do nothing when no listener was registered with bound', function() {
+      var aElem = jqLite(a);
+
+      aElem.unbind();
+      aElem.unbind('click');
+      aElem.unbind('click', function() {});
+    });
+
+
+    it('should deregister all listeners', function() {
+      var aElem = jqLite(a),
+          clickSpy = jasmine.createSpy('click'),
+          mouseoverSpy = jasmine.createSpy('mouseover');
+
+      aElem.bind('click', clickSpy);
+      aElem.bind('mouseover', mouseoverSpy);
+
+      browserTrigger(a, 'click');
+      expect(clickSpy).toHaveBeenCalledOnce();
+      browserTrigger(a, 'mouseover');
+      expect(mouseoverSpy).toHaveBeenCalledOnce();
+
+      clickSpy.reset();
+      mouseoverSpy.reset();
+
+      aElem.unbind();
+
+      browserTrigger(a, 'click');
+      expect(clickSpy).not.toHaveBeenCalled();
+      browserTrigger(a, 'mouseover');
+      expect(mouseoverSpy).not.toHaveBeenCalled();
+    });
+
+
+    it('should deregister listeners for specific type', function() {
+      var aElem = jqLite(a),
+          clickSpy = jasmine.createSpy('click'),
+          mouseoverSpy = jasmine.createSpy('mouseover');
+
+      aElem.bind('click', clickSpy);
+      aElem.bind('mouseover', mouseoverSpy);
+
+      browserTrigger(a, 'click');
+      expect(clickSpy).toHaveBeenCalledOnce();
+      browserTrigger(a, 'mouseover');
+      expect(mouseoverSpy).toHaveBeenCalledOnce();
+
+      clickSpy.reset();
+      mouseoverSpy.reset();
+
+      aElem.unbind('click');
+
+      browserTrigger(a, 'click');
+      expect(clickSpy).not.toHaveBeenCalled();
+      browserTrigger(a, 'mouseover');
+      expect(mouseoverSpy).toHaveBeenCalledOnce();
+
+      mouseoverSpy.reset();
+
+      aElem.unbind('mouseover');
+      browserTrigger(a, 'mouseover');
+      expect(mouseoverSpy).not.toHaveBeenCalled();
+    });
+
+
+    it('should deregister specific listener', function() {
+      var aElem = jqLite(a),
+          clickSpy1 = jasmine.createSpy('click1'),
+          clickSpy2 = jasmine.createSpy('click2');
+
+      aElem.bind('click', clickSpy1);
+      aElem.bind('click', clickSpy2);
+
+      browserTrigger(a, 'click');
+      expect(clickSpy1).toHaveBeenCalledOnce();
+      expect(clickSpy2).toHaveBeenCalledOnce();
+
+      clickSpy1.reset();
+      clickSpy2.reset();
+
+      aElem.unbind('click', clickSpy1);
+
+      browserTrigger(a, 'click');
+      expect(clickSpy1).not.toHaveBeenCalled();
+      expect(clickSpy2).toHaveBeenCalledOnce();
+
+      clickSpy2.reset();
+
+      aElem.unbind('click', clickSpy2);
+      browserTrigger(a, 'click');
+      expect(clickSpy2).not.toHaveBeenCalled();
+    });
+  });
+
+
   describe('replaceWith', function(){
     it('should replaceWith', function(){
       var root = jqLite('<div>').html('before-<div></div>after');