1 files changed, 21 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/String/prototype/concat/S15.5.4.6_A1_T9.js b/js/src/tests/test262/built-ins/String/prototype/concat/S15.5.4.6_A1_T9.js
new file mode 100644
index 0000000000..7a49043e8e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/String/prototype/concat/S15.5.4.6_A1_T9.js
@@ -0,0 +1,21 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: String.prototype.concat([,[...]])
+es5id: 15.5.4.6_A1_T9
+description: >
+    Call concat([,[...]]) function with function(){}() argument of
+    string object
+---*/
+
+//////////////////////////////////////////////////////////////////////////////
+//CHECK#1
+//since ToString(undefined) evaluates to "undefined" concat(undefined) evaluates to concat("undefined")
+if (new String(42).concat(function() {}()) !== "42undefined") {
+  throw new Test262Error('#1: new String(42).concat(function(){}()) === "42undefined". Actual: ' + new String(42).concat(function() {}()));
+}
+//
+//////////////////////////////////////////////////////////////////////////////
+
+reportCompare(0, 0);