1 files changed, 20 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/String/prototype/charCodeAt/S15.5.4.5_A2.js b/js/src/tests/test262/built-ins/String/prototype/charCodeAt/S15.5.4.5_A2.js
new file mode 100644
index 0000000000..e7e04ab7f9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/String/prototype/charCodeAt/S15.5.4.5_A2.js
@@ -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.
+
+/*---
+info: |
+    When String.prototype.charCodeAt(pos) calls if ToInteger(pos) less than 0
+    the NaN returns
+es5id: 15.5.4.5_A2
+description: Call charCodeAt(pos) with negative pos
+---*/
+
+function __FACTORY() {};
+
+__FACTORY.prototype.charCodeAt = String.prototype.charCodeAt;
+
+var __instance = new __FACTORY;
+
+assert.sameValue(__instance.charCodeAt(-1), NaN);
+
+reportCompare(0, 0);