1 files changed, 16 insertions, 0 deletions
diff --git a/spec/utils.js b/spec/utils.js
index 390ad05..ea7d782 100644
--- a/spec/utils.js
+++ b/spec/utils.js
@@ -56,4 +56,20 @@ describe('utils', function() {
       equals(Handlebars.Utils.isEmpty({bar: 1}), false);
     });
   });
+
+  describe('#extend', function() {
+    it('should ignore prototype values', function() {
+      function A() {
+        this.a = 1;
+      }
+      A.prototype.b = 4;
+
+      var b = {b: 2};
+
+      Handlebars.Utils.extend(b, new A());
+
+      equals(b.a, 1);
+      equals(b.b, 2);
+    });
+  });
 });