Implemented Array.prototype.filter()

JerryScript-DCO-1.0-Signed-off-by: Dániel Bátyai dbatyai.u-szeged@partner.samsung.com

tests/jerry/array_prototype_filter.js

@@ -0,0 +1,72 @@
+// 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.
+
+var array = ["foo", [], Infinity, 4]
+
+function f(arg1, arg2, arg3) {
+	assert(arg1 === array[arg2]);
+	assert(arg3 === array);
+	return true;
+}
+
+var filtered = array.filter(f);
+assert(filtered.length === array.length);
+for (i = 0; i < filtered.length; i++) {
+	assert(filtered[i] === array[i]);
+}
+
+var array = [1, 2, 3, 4, 5, 6, 7, 8];
+
+function g (arg1, arg2, arg3) {
+	if (arg2 % 2 === 0) {
+		return true;
+	} else {
+		return false;
+	}
+}
+
+filtered = array.filter(g)
+assert(filtered.length === 4);
+assert(filtered[0] === 1);
+assert(filtered[1] === 3);
+assert(filtered[2] === 5);
+assert(filtered[3] === 7);
+
+// Checking behavior when unable to get length
+var obj = {};
+Object.defineProperty(obj, 'length', { 'get' : function () {throw new ReferenceError ("foo"); } });
+obj.filter = Array.prototype.filter;
+
+try {
+	obj.filter(f);
+	assert(false);
+} catch (e) {
+	assert(e.message === "foo");
+	assert(e instanceof ReferenceError);
+}
+
+// Checking behavior when unable to get element
+var obj = {}
+obj.length = 1;
+Object.defineProperty(obj, '0', { 'get' : function () {throw new ReferenceError ("foo"); } });
+obj.filter = Array.prototype.filter
+
+try {
+	obj.filter(f);
+	assert(false);
+} catch (e) {
+	assert(e.message === "foo");
+	assert(e instanceof ReferenceError);
+}