String.prototype.concat()

JerryScript-DCO-1.0-Signed-off-by: Laszlo Vidacs lvidacs.u-szeged@partner.samsung.com

tests/jerry/string_prototype_concat.js

@@ -0,0 +1,55 @@
+// Copyright 2015 Samsung Electronics Co., Ltd.
+// Copyright 2015 University of Szeged.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// check properties
+assert(Object.getOwnPropertyDescriptor(String.prototype.concat, 'length').configurable === false);
+
+assert(Object.getOwnPropertyDescriptor(String.prototype.concat, 'length').enumerable === false);
+
+assert(Object.getOwnPropertyDescriptor(String.prototype.concat, 'length').writable === false);
+
+// simple checks
+var s1 = "Hello ";
+var s2 = "world!";
+var s3 = " ";
+assert(s1.concat(s2, s3, 3, 10, "  ", ".") === "Hello world! 310  .");
+assert("Hello ".concat(s1) === "Hello Hello ");
+
+assert(s1.concat(0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9) === "Hello 012345678901234567890123456789");
+
+// check undefined
+var y;
+assert("Check ".concat(y) === "Check undefined");
+
+// check toString error in this object
+var y = {};
+y.toString = function () { throw new ReferenceError ("foo");}
+y.concat = String.prototype.concat;
+try {
+  y.concat("cat");
+  assert(false);
+} catch (e) {
+  assert(e instanceof ReferenceError);
+}
+
+// check toString error in arguments
+var x = {};
+x.toString = function () { throw new ReferenceError ("foo");}
+try {
+  "a".concat(x);
+  assert(false);
+} catch (e) {
+  assert(e instanceof ReferenceError);
+}