diff -r 000000000000 -r 6474c204b198 js/src/tests/ecma_5/extensions/Number-toSource.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/tests/ecma_5/extensions/Number-toSource.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,17 @@
+/*
+ * Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/licenses/publicdomain/
+ */
+
+assertEq(raisesException(TypeError)('Number.prototype.toSource.call("")'), true);
+assertEq(raisesException(TypeError)('Number.prototype.toSource.call(true)'), true);
+assertEq(raisesException(TypeError)('Number.prototype.toSource.call({})'), true);
+assertEq(raisesException(TypeError)('Number.prototype.toSource.call(null)'), true);
+assertEq(raisesException(TypeError)('Number.prototype.toSource.call([])'), true);
+assertEq(raisesException(TypeError)('Number.prototype.toSource.call(undefined)'), true);
+assertEq(raisesException(TypeError)('Number.prototype.toSource.call(new Boolean(true))'), true);
+
+assertEq(completesNormally('Number.prototype.toSource.call(42)'), true);
+assertEq(completesNormally('Number.prototype.toSource.call(new Number(42))'), true);
+
+reportCompare(true, true);