diff -r 000000000000 -r 6474c204b198 js/src/tests/test262/ch09/9.4/S9.4_A1.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/tests/test262/ch09/9.4/S9.4_A1.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,20 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/**
+ * If ToNumber(value) is NaN, ToInteger(value) returns +0
+ *
+ * @path ch09/9.4/S9.4_A1.js
+ * @description Check what position is defined by Number.NaN in string "abc": "abc".charAt(Number.NaN)
+ */
+
+// CHECK#1
+if ("abc".charAt(Number.NaN) !== "a") {
+  $ERROR('#1: "abc".charAt(Number.NaN) === "a". Actual: ' + ("abc".charAt(Number.NaN)));
+}
+
+// CHECK#2
+if ("abc".charAt("x") !== "a") {
+  $ERROR('#2: "abc".charAt("x") === "a". Actual: ' + ("abc".charAt("x")));
+}
+