1 files changed, 19 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/String/prototype/concat/S15.5.4.6_A1_T4.js b/js/src/tests/test262/built-ins/String/prototype/concat/S15.5.4.6_A1_T4.js
new file mode 100644
index 0000000000..cbc64804f8
--- /dev/null
+++ b/js/src/tests/test262/built-ins/String/prototype/concat/S15.5.4.6_A1_T4.js
@@ -0,0 +1,19 @@
+// 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_T4
+description: Call concat([,[...]]) function without argument of string object
+---*/
+
+//////////////////////////////////////////////////////////////////////////////
+//CHECK#1
+//since ToString() evaluates to "" concat() evaluates to concat("")
+if ("lego".concat() !== "lego") {
+  throw new Test262Error('#1: "lego".concat() === "lego". Actual: ' + ("lego".concat()));
+}
+//
+//////////////////////////////////////////////////////////////////////////////
+
+reportCompare(0, 0);