test(ngAria): test that aria-hidden is always "true" or "false"

Previously, when using ngAria with the ng-hide directive,
and the value passed to ng-hide was not boolean,
the aria-hidden attribute was set to this non-boolean value.

Closes angular#11865

Author: typeofweb

test/ngAria/ariaSpec.js

@@ -57,6 +57,31 @@ describe('$aria', function() {
       scope.$apply('val = true');
       expect(element.attr('aria-hidden')).toBe('userSetValue');
     });
+
+    it('should always set aria-hidden to a boolean value', function() {
+      compileElement('<div ng-hide="val"></div>');
+
+      scope.$apply('val = "test angular"');
+      expect(element.attr('aria-hidden')).toBe('true');
+
+      scope.$apply('val = null');
+      expect(element.attr('aria-hidden')).toBe('false');
+
+      scope.$apply('val = {}');
+      expect(element.attr('aria-hidden')).toBe('true');
+
+
+      compileElement('<div ng-show="val"></div>');
+
+      scope.$apply('val = "test angular"');
+      expect(element.attr('aria-hidden')).toBe('false');
+
+      scope.$apply('val = null');
+      expect(element.attr('aria-hidden')).toBe('true');
+
+      scope.$apply('val = {}');
+      expect(element.attr('aria-hidden')).toBe('false');
+    });
   });