diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/proxy/testDirectProxyHas1.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/proxy/testDirectProxyHas1.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,13 @@
+// Forward to the target if the trap is not defined
+var proxy = Proxy(Object.create(Object.create(null, {
+    'foo': {
+        configurable: true
+    }
+}), {
+    'bar': {
+        configurable: true
+    }
+}), {});
+assertEq('foo' in proxy, true);
+assertEq('bar' in proxy, true);
+assertEq('baz' in proxy, false);