Improvements for ecma_op_general_object_define_own_property.

List of improvements:
 - Get the [[Enumerable]] and [[Configurable]] attributes before removing a property.
 - Directly check the type of the property in asserts.

Related issues: #115 and #132

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

tests/jerry/regression-test-issue-115.js

@@ -0,0 +1,19 @@
+// 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 v_1 = [,];
+Object.defineProperty(v_1, "0", {
+    set: function() {},
+});

tests/jerry/regression-test-issue-132.js

@@ -0,0 +1,42 @@
+// 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.
+
+// Test raised by fuzzer
+v_0 = [,];
+v_1 = [,];
+v_2 = Object.defineProperties([,], { '0': {  get: function() { } } });
+
+// Test change from data to accessor type
+var a = { x:2 };
+Object.defineProperty(a, "x", {
+      enumerable: true,
+      configurable: true,
+      get: function() { return 0; }
+});
+
+// Test change from accessor to data type
+var obj = {test: 2};
+
+Object.defineProperty(obj, "test", {
+      enumerable: true,
+      configurable: true,
+      get: function() { return 0; }
+});
+
+Object.defineProperty(obj, "x", {
+      enumerable: true,
+      configurable: true,
+      value: -2
+});