fix(ngAria): change accessibility keypress event to use event.which if it is provided

In Firefox, keyboard events for printable characters (e.g. space) do not use event.keyCode.
Use event.which if it is provided before falling back to event.keyCode.

Closes angular#11340

Author: andrewaustin

src/ngAria/aria.js

@@ -347,7 +347,8 @@ ngAriaModule.directive('ngShow', ['$aria', function($aria) {
 
         if ($aria.config('bindKeypress') && !attr.ngKeypress && !isNodeOneOf(elem, nodeBlackList)) {
           elem.on('keypress', function(event) {
-            if (event.keyCode === 32 || event.keyCode === 13) {
+            var keyCode = event.which || event.keyCode;
+            if (keyCode === 32 || keyCode === 13) {
               scope.$apply(callback);
             }
 

test/ngAria/ariaSpec.js

@@ -598,7 +598,7 @@ describe('$aria', function() {
 
     var clickFn;
 
-    it('should a trigger click from the keyboard', function() {
+    it('should trigger a click from the keyboard', function() {
       scope.someAction = function() {};
 
       var elements = $compile('<section>' +
@@ -620,6 +620,28 @@ describe('$aria', function() {
       expect(clickFn).toHaveBeenCalledWith('li');
     });
 
+    it('should trigger a click in browsers that provide event.which instead of event.keyCode', function() {
+      scope.someAction = function() {};
+
+      var elements = $compile('<section>' +
+      '<div class="div-click" ng-click="someAction(\'div\')" tabindex="0"></div>' +
+      '<ul><li ng-click="someAction( \'li\')" tabindex="0"></li></ul>' +
+      '</section>')(scope);
+
+      scope.$digest();
+
+      clickFn = spyOn(scope, 'someAction');
+
+      var divElement = elements.find('div');
+      var liElement = elements.find('li');
+
+      divElement.triggerHandler({type: 'keypress', which: 32});
+      liElement.triggerHandler({type: 'keypress', which: 32});
+
+      expect(clickFn).toHaveBeenCalledWith('div');
+      expect(clickFn).toHaveBeenCalledWith('li');
+    });
+
     it('should not override existing ng-keypress', function() {
       scope.someOtherAction = function() {};
       var keypressFn = spyOn(scope, 'someOtherAction');