1 files changed, 25 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/String/prototype/concat/S15.5.4.6_A1_T5.js b/js/src/tests/test262/built-ins/String/prototype/concat/S15.5.4.6_A1_T5.js
new file mode 100644
index 0000000000..492f6d8772
--- /dev/null
+++ b/js/src/tests/test262/built-ins/String/prototype/concat/S15.5.4.6_A1_T5.js
@@ -0,0 +1,25 @@
+// 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_T5
+description: >
+    Call concat([,[...]]) function with null argument of function
+    object
+---*/
+
+//////////////////////////////////////////////////////////////////////////////
+//CHECK#1
+//since ToString(null) evaluates to "null" concat(null) evaluates to concat("null")
+if (function() {
+    return "lego"
+  }().concat(null) !== "legonull") {
+  throw new Test262Error('#1: function(){return "lego"}().concat(null) === "legonull". Actual: ' + function() {
+    return "lego"
+  }().concat(null));
+}
+//
+//////////////////////////////////////////////////////////////////////////////
+
+reportCompare(0, 0);