Experimental parser: merge to r19637

test/mjsunit/proto-accessor.js

+// Copyright 2013 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Flags: --harmony-symbols
+
+// Fake Symbol if undefined, allowing test to run in non-Harmony mode as well.
+this.Symbol = typeof Symbol != 'undefined' ? Symbol : String;
+
+
+var desc = Object.getOwnPropertyDescriptor(Object.prototype, "__proto__");
+var getProto = desc.get;
+var setProto = desc.set;
+
+function TestNoPoisonPill() {
+  assertEquals("function", typeof desc.get);
+  assertEquals("function", typeof desc.set);
+  assertDoesNotThrow("desc.get.call({})");
+  assertDoesNotThrow("desc.set.call({}, {})");
+
+  var obj = {};
+  var obj2 = {};
+  desc.set.call(obj, obj2);
+  assertEquals(obj.__proto__, obj2);
+  assertEquals(desc.get.call(obj), obj2);
+}
+TestNoPoisonPill();
+
+
+function TestRedefineObjectPrototypeProtoGetter() {
+  Object.defineProperty(Object.prototype, "__proto__", {
+    get: function() {
+      return 42;
+    }
+  });
+  assertEquals({}.__proto__, 42);
+  assertEquals(desc.get.call({}), Object.prototype);
+
+  var desc2 = Object.getOwnPropertyDescriptor(Object.prototype, "__proto__");
+  assertEquals(desc2.get.call({}), 42);
+  assertEquals(desc2.set.call({}), undefined);
+
+  Object.defineProperty(Object.prototype, "__proto__", {
+    set: function(x) {}
+  });
+  var desc3 = Object.getOwnPropertyDescriptor(Object.prototype, "__proto__");
+  assertEquals(desc3.get.call({}), 42);
+  assertEquals(desc3.set.call({}), undefined);
+}
+TestRedefineObjectPrototypeProtoGetter();
+
+
+function TestRedefineObjectPrototypeProtoSetter() {
+  Object.defineProperty(Object.prototype, "__proto__", { set: undefined });
+  assertThrows(function() {
+    "use strict";
+    var o = {};
+    var p = {};
+    o.__proto__ = p;
+  }, TypeError);
+}
+TestRedefineObjectPrototypeProtoSetter();
+
+
+function TestGetProtoOfValues() {
+  assertEquals(getProto.call(1), Number.prototype);
+  assertEquals(getProto.call(true), Boolean.prototype);
+  assertEquals(getProto.call(false), Boolean.prototype);
+  assertEquals(getProto.call('s'), String.prototype);
+  assertEquals(getProto.call(Symbol()), Symbol.prototype);
+
+  assertThrows(function() { getProto.call(null); }, TypeError);
+  assertThrows(function() { getProto.call(undefined); }, TypeError);
+}
+TestGetProtoOfValues();
+
+
+var values = [1, true, false, 's', Symbol()];
+
+
+function TestSetProtoOfValues() {
+  for (var i = 0; i < values.length; i++) {
+    assertEquals(setProto.call(values[i], i), undefined);
+  }
+
+  assertThrows(function() { setProto.call(null, 7); }, TypeError);
+  assertThrows(function() { setProto.call(undefined, 8); }, TypeError);
+}
+TestSetProtoOfValues();
+
+
+function TestSetProtoToValue() {
+  var object = {};
+  var proto = {};
+  setProto.call(object, proto);
+
+  var valuesWithUndefined = values.concat(undefined);
+
+  for (var i = 0; i < valuesWithUndefined.length; i++) {
+    assertEquals(setProto.call(object, valuesWithUndefined[i]), undefined);
+    assertEquals(getProto.call(object), proto);
+  }
+
+  // null is the only valid value that can be used as a [[Prototype]].
+  assertEquals(setProto.call(object, null), undefined);
+  assertEquals(getProto.call(object), null);
+}
+TestSetProtoToValue();
+
+
+function TestDeleteProto() {
+  assertTrue(delete Object.prototype.__proto__);
+  var o = {};
+  var p = {};
+  o.__proto__ = p;
+  assertEquals(Object.getPrototypeOf(o), Object.prototype);
+  var desc4 = Object.getOwnPropertyDescriptor(o, "__proto__");
+  assertTrue(desc4.configurable);
+  assertTrue(desc4.enumerable);
+  assertTrue(desc4.writable);
+  assertEquals(desc4.value, p);
+}
+TestDeleteProto();