fix(jqLite): special-case attr('class') because of IE9 bug

Author: IgorMinar

src/jqLite.js

@@ -245,7 +245,13 @@ forEach({
   },
 
   attr: function(element, name, value){
-    if (SPECIAL_ATTR[name]) {
+    if (name === 'class') {
+      if(isDefined(value)) {
+        element.className = value;
+      } else {
+        return element.className;
+      }
+    } else if (SPECIAL_ATTR[name]) {
       if (isDefined(value)) {
         element[name] = !!value;
       } else {

test/jqLiteSpec.js

@@ -168,6 +168,15 @@ describe('jqLite', function(){
       var elm = jqLite('<div class="any">a</div>');
       expect(elm.attr('non-existing')).toBeUndefined();
     });
+
+    it('should special-case "class" attribute', function() {
+      // stupid IE9 returns null for element.getAttribute('class') when element has ng:class attr
+      var elm = jqLite('<div class=" any " ng:class="dynCls">a</div>');
+      expect(elm.attr('class')).toBe(' any ');
+
+      elm.attr('class', 'foo  bar');
+      expect(elm.attr('class')).toBe('foo  bar');
+    });
   });