diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/basic/test-jitinfo.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/basic/test-jitinfo.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,24 @@
+// Test for the shell's FakeDOMObject constructor. This test
+// ensures the fuzzers know about this object.
+function f() {
+    var res = 0;
+    var d = new FakeDOMObject();
+    assertEq(d !== new FakeDOMObject(), true);
+
+    for (var i=0; i<100; i++) {
+	var x = d.x;
+	assertEq(typeof x, "number");
+
+	d.x = 10;
+	d.x = undefined;
+
+	d.x = FakeDOMObject.prototype.x;
+	FakeDOMObject.prototype.x = d.x;
+	FakeDOMObject.prototype.doFoo();
+
+	assertEq(d.doFoo(), 0);
+	assertEq(d.doFoo(1), 1);
+	assertEq(d.doFoo(1, 2), 2);
+    }
+}
+f();