diff -r 000000000000 -r 6474c204b198 js/src/tests/ecma_5/JSON/stringify-dropping-elements.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/tests/ecma_5/JSON/stringify-dropping-elements.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,22 @@
+// Ported from dom/src/json/test/unit/test_dropping_elements_in_stringify.js
+
+assertEq(JSON.stringify({foo: 123}),
+         '{"foo":123}');
+assertEq(JSON.stringify({foo: 123, bar: function () {}}),
+         '{"foo":123}');
+assertEq(JSON.stringify({foo: 123, bar: function () {}, baz: 123}),
+         '{"foo":123,"baz":123}');
+
+assertEq(JSON.stringify([123]),
+         '[123]');
+assertEq(JSON.stringify([123, function () {}]),
+         '[123,null]');
+assertEq(JSON.stringify([123, function () {}, 456]),
+         '[123,null,456]');
+
+/******************************************************************************/
+
+if (typeof reportCompare === "function")
+  reportCompare(true, true);
+
+print("Tests complete");