fix tests for IE9

Author: Narretz

test/ng/directive/ngOptionsSpec.js

@@ -763,16 +763,16 @@ describe('ngOptions', function() {
     scope.selected = scope.values[1];
     scope.$digest();
 
-    expect(options[1].getAttribute('selected')).toBe(null);
+    expect(options[1].hasAttribute('selected')).toBe(false);
     expect(options[2].getAttribute('selected')).toBe('selected');
 
     scope.selected = 'no match';
     scope.$digest();
 
     expect(options[0].selected).toBe(true);
     expect(options[0].getAttribute('selected')).toBe('selected');
-    expect(options[1].getAttribute('selected')).toBe(null);
-    expect(options[2].getAttribute('selected')).toBe(null);
+    expect(options[1].hasAttribute('selected')).toBe(false);
+    expect(options[2].hasAttribute('selected')).toBe(false);
   });
 
   describe('disableWhen expression', function() {
@@ -1445,7 +1445,7 @@ describe('ngOptions', function() {
       expect(options[0].selected).toBe(true);
       expect(options[0].getAttribute('selected')).toBe('selected');
       expect(options[2].selected).toBe(false);
-      expect(options[2].getAttribute('selected')).toBe(null);
+      expect(options[2].hasAttribute('selected')).toBe(false);
     });
 
   });