Implement Object.prototype.{__defineGetter__, __defineSetter__} (#4032)

__defineGetter__ is based on ECMA-262 v11, B.2.2.2
__defineSetter__ is based on ECMA-262 v11, B.2.2.3

JerryScript-DCO-1.0-Signed-off-by: Adam Szilagyi aszilagy@inf.u-szeged.hu

tests/jerry/es.next/object-prototype-define-getter.js

@@ -0,0 +1,51 @@
+// Copyright JS Foundation and other contributors, http://js.foundation
+//
+// 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 o = {};
+o.__defineGetter__('foo', function() { return 5; });
+assert(o.foo === 5);
+
+var obj = {};
+function bar() { return "bar"; }
+Object.prototype.__defineGetter__.call(obj, "foo", bar);
+var prop = Object.getOwnPropertyDescriptor(obj, "foo");
+assert(prop.get == bar);
+assert(!prop.writable);
+assert(prop.configurable);
+assert(prop.enumerable);
+
+var obj = {};
+var sym = Symbol();
+function bar() { return "bar"; }
+Object.prototype.__defineGetter__.call(obj, sym, bar);
+var prop = Object.getOwnPropertyDescriptor(obj, sym);
+assert(prop.get == bar);
+assert(!prop.writable);
+assert(prop.configurable);
+assert(prop.enumerable);;
+
+var key = '__accessors_test__';
+Object.prototype.__defineGetter__.call(1, key, function(){});
+
+try {
+  Object.prototype.__defineGetter__.call(null, key, function(){});
+  assert(false);
+} catch(e){
+  assert(e instanceof TypeError);
+}
+
+var def = [];
+var p = new Proxy({}, { defineProperty: function(o, v, desc) { def.push(v); Object.defineProperty(o, v, desc); return true; }});
+Object.prototype.__defineGetter__.call(p, "foo", Object);
+assert(def + '' === "foo");

tests/jerry/es.next/object-prototype-define-setter.js

@@ -0,0 +1,53 @@
+// Copyright JS Foundation and other contributors, http://js.foundation
+//
+// 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 o = {};
+o.__defineSetter__('foo', function(val) { this.bar = val; });
+o.foo = 5;
+assert(o.foo === undefined); // undefined
+assert(o.bar === 5); 
+
+var obj = {};
+function bar() {}
+Object.prototype.__defineSetter__.call(obj, "foo", bar);
+var prop = Object.getOwnPropertyDescriptor(obj, "foo");
+assert(prop.set === bar);
+assert(!prop.writable);
+assert(prop.configurable);
+assert(prop.enumerable);
+
+var obj = {};
+var sym = Symbol();
+function bar(baz) {}
+Object.prototype.__defineSetter__.call(obj, sym, bar);
+var prop = Object.getOwnPropertyDescriptor(obj, sym);
+assert(prop.set === bar);
+assert(!prop.writable);
+assert(prop.configurable);
+assert(prop.enumerable);
+
+var key = '__accessors_test__';
+Object.prototype.__defineSetter__.call(1, key, function(){});
+
+try {
+  Object.prototype.__defineSetter__.call(null, key, function(){});
+  assert(false);
+} catch (e) {
+  assert(e instanceof TypeError);
+}
+
+var def = [];
+var p = new Proxy({}, { defineProperty: function(o, v, desc) { def.push(v); Object.defineProperty(o, v, desc); return true; }});
+Object.prototype.__defineSetter__.call(p, "foo", Object);
+assert(def + '' === "foo");