test(ngStyle): add test for object literal

Author: jbedard

test/ng/directive/ngStyleSpec.js

@@ -22,6 +22,16 @@ describe('ngStyle', function() {
     expect(element.hasClass('ng-exception')).toBeFalsy();
   }));
 
+  it('should support binding for object literals', inject(function($rootScope, $compile) {
+    element = $compile('<div ng-style="{height: heightStr}"></div>')($rootScope);
+    $rootScope.$digest();
+    expect(parseInt(element.css('height') + 0, 10)).toEqual(0); // height could be '' or '0px'
+    $rootScope.$apply('heightStr = "40px"');
+    expect(element.css('height')).toBe('40px');
+
+    $rootScope.$apply('heightStr = "100px"');
+    expect(element.css('height')).toBe('100px');
+  }));
 
   it('should support lazy one-time binding for object literals', inject(function($rootScope, $compile) {
     element = $compile('<div ng-style="::{height: heightStr}"></div>')($rootScope);