Implement Function.prototype.toString.

JerryScript-DCO-1.0-Signed-off-by: Peter Gal pgal.u-szeged@partner.samsung.com

tests/jerry/function_prototype_tostring.js

@@ -0,0 +1,28 @@
+// 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.
+
+assert (Math.cos.toString() === "function(){/* ecmascript */}");
+
+function none() { return 1; }
+assert (none.toString() === "function(){/* ecmascript */}");
+
+function single(b) { return 1; }
+assert (single.toString() === "function(){/* ecmascript */}");
+
+function multiple(a,b) { return 1; }
+assert (multiple.toString() === "function(){/* ecmascript */}");
+
+function lots(a,b,c,d,e,f,g,h,i,j,k) { return 1; }
+assert (lots.toString() === "function(){/* ecmascript */}");