Remove runtime flags for Proxy and Reflect

test/mjsunit/harmony/reflect-define-property.js

-// Copyright 2012-2015 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.
-
-// Tests the Reflect.defineProperty method - ES6 26.1.3
-// This is adapted from mjsunit/object-define-property.js.
-
-// Flags: --allow-natives-syntax --harmony-reflect
-
-
-// Check that an exception is thrown when null is passed as object.
-var exception = false;
-try {
-  Reflect.defineProperty(null, null, null);
-} catch (e) {
-  exception = true;
-  assertTrue(/called on non-object/.test(e));
-}
-assertTrue(exception);
-
-// Check that an exception is thrown when undefined is passed as object.
-exception = false;
-try {
-  Reflect.defineProperty(undefined, undefined, undefined);
-} catch (e) {
-  exception = true;
-  assertTrue(/called on non-object/.test(e));
-}
-assertTrue(exception);
-
-// Check that an exception is thrown when non-object is passed as object.
-exception = false;
-try {
-  Reflect.defineProperty(0, "foo", undefined);
-} catch (e) {
-  exception = true;
-  assertTrue(/called on non-object/.test(e));
-}
-assertTrue(exception);
-
-// Object.
-var obj1 = {};
-
-// Values.
-var val1 = 0;
-var val2 = 0;
-var val3 = 0;
-
-function setter1() {val1++; }
-function getter1() {return val1; }
-
-function setter2() {val2++; }
-function getter2() {return val2; }
-
-function setter3() {val3++; }
-function getter3() {return val3; }
-
-
-// Descriptors.
-var emptyDesc = {};
-
-var accessorConfigurable = {
-    set: setter1,
-    get: getter1,
-    configurable: true
-};
-
-var accessorNoConfigurable = {
-    set: setter2,
-    get: getter2,
-    configurable: false
-};
-
-var accessorOnlySet = {
-  set: setter3,
-  configurable: true
-};
-
-var accessorOnlyGet = {
-  get: getter3,
-  configurable: true
-};
-
-var accessorDefault = {set: function(){} };
-
-var dataConfigurable = { value: 1000, configurable: true };
-
-var dataNoConfigurable = { value: 2000, configurable: false };
-
-var dataWritable = { value: 3000, writable: true};
-
-
-// Check that we can't add property with undefined attributes.
-assertThrows(function() { Reflect.defineProperty(obj1, "foo", undefined) },
-  TypeError);
-
-// Make sure that we can add a property with an empty descriptor and
-// that it has the default descriptor values.
-assertTrue(Reflect.defineProperty(obj1, "foo", emptyDesc));
-
-// foo should be undefined as it has no get, set or value
-assertEquals(undefined, obj1.foo);
-
-// We should, however, be able to retrieve the propertydescriptor which should
-// have all default values (according to 8.6.1).
-var desc = Object.getOwnPropertyDescriptor(obj1, "foo");
-assertFalse(desc.configurable);
-assertFalse(desc.enumerable);
-assertFalse(desc.writable);
-assertEquals(desc.get, undefined);
-assertEquals(desc.set, undefined);
-assertEquals(desc.value, undefined);
-
-// Make sure that getOwnPropertyDescriptor does not return a descriptor
-// with default values if called with non existing property (otherwise
-// the test above is invalid).
-desc = Object.getOwnPropertyDescriptor(obj1, "bar");
-assertEquals(desc, undefined);
-
-// Make sure that foo can't be reset (as configurable is false).
-assertFalse(Reflect.defineProperty(obj1, "foo", accessorConfigurable));
-
-
-// Accessor properties
-
-assertTrue(Reflect.defineProperty(obj1, "bar", accessorConfigurable));
-desc = Object.getOwnPropertyDescriptor(obj1, "bar");
-assertTrue(desc.configurable);
-assertFalse(desc.enumerable);
-assertEquals(desc.writable, undefined);
-assertEquals(desc.get, accessorConfigurable.get);
-assertEquals(desc.set, accessorConfigurable.set);
-assertEquals(desc.value, undefined);
-assertEquals(1, obj1.bar = 1);
-assertEquals(1, val1);
-assertEquals(1, obj1.bar = 1);
-assertEquals(2, val1);
-assertEquals(2, obj1.bar);
-
-// Redefine bar with non configurable test
-assertTrue(Reflect.defineProperty(obj1, "bar", accessorNoConfigurable));
-desc = Object.getOwnPropertyDescriptor(obj1, "bar");
-assertFalse(desc.configurable);
-assertFalse(desc.enumerable);
-assertEquals(desc.writable, undefined);
-assertEquals(desc.get, accessorNoConfigurable.get);
-assertEquals(desc.set, accessorNoConfigurable.set);
-assertEquals(desc.value, undefined);
-assertEquals(1, obj1.bar = 1);
-assertEquals(2, val1);
-assertEquals(1, val2);
-assertEquals(1, obj1.bar = 1)
-assertEquals(2, val1);
-assertEquals(2, val2);
-assertEquals(2, obj1.bar);
-
-// Try to redefine bar again - should fail as configurable is false.
-assertFalse(Reflect.defineProperty(obj1, "bar", accessorConfigurable));
-
-// Try to redefine bar again using the data descriptor - should fail.
-assertFalse(Reflect.defineProperty(obj1, "bar", dataConfigurable));
-
-// Redefine using same descriptor - should succeed.
-assertTrue(Reflect.defineProperty(obj1, "bar", accessorNoConfigurable));
-desc = Object.getOwnPropertyDescriptor(obj1, "bar");
-assertFalse(desc.configurable);
-assertFalse(desc.enumerable);
-assertEquals(desc.writable, undefined);
-assertEquals(desc.get, accessorNoConfigurable.get);
-assertEquals(desc.set, accessorNoConfigurable.set);
-assertEquals(desc.value, undefined);
-assertEquals(1, obj1.bar = 1);
-assertEquals(2, val1);
-assertEquals(3, val2);
-assertEquals(1, obj1.bar = 1)
-assertEquals(2, val1);
-assertEquals(4, val2);
-assertEquals(4, obj1.bar);
-
-// Define an accessor that has only a setter.
-assertTrue(Reflect.defineProperty(obj1, "setOnly", accessorOnlySet));
-desc = Object.getOwnPropertyDescriptor(obj1, "setOnly");
-assertTrue(desc.configurable);
-assertFalse(desc.enumerable);
-assertEquals(desc.set, accessorOnlySet.set);
-assertEquals(desc.writable, undefined);
-assertEquals(desc.value, undefined);
-assertEquals(desc.get, undefined);
-assertEquals(1, obj1.setOnly = 1);
-assertEquals(1, val3);
-
-// Add a getter - should not touch the setter.
-assertTrue(Reflect.defineProperty(obj1, "setOnly", accessorOnlyGet));
-desc = Object.getOwnPropertyDescriptor(obj1, "setOnly");
-assertTrue(desc.configurable);
-assertFalse(desc.enumerable);
-assertEquals(desc.get, accessorOnlyGet.get);
-assertEquals(desc.set, accessorOnlySet.set);
-assertEquals(desc.writable, undefined);
-assertEquals(desc.value, undefined);
-assertEquals(1, obj1.setOnly = 1);
-assertEquals(2, val3);
-
-// The above should also work if redefining just a getter or setter on
-// an existing property with both a getter and a setter.
-assertTrue(Reflect.defineProperty(obj1, "both", accessorConfigurable));
-
-assertTrue(Reflect.defineProperty(obj1, "both", accessorOnlySet));
-desc = Object.getOwnPropertyDescriptor(obj1, "both");
-assertTrue(desc.configurable);
-assertFalse(desc.enumerable);
-assertEquals(desc.set, accessorOnlySet.set);
-assertEquals(desc.get, accessorConfigurable.get);
-assertEquals(desc.writable, undefined);
-assertEquals(desc.value, undefined);
-assertEquals(1, obj1.both = 1);
-assertEquals(3, val3);
-
-
-// Data properties
-
-assertTrue(Reflect.defineProperty(obj1, "foobar", dataConfigurable));
-desc = Object.getOwnPropertyDescriptor(obj1, "foobar");
-assertEquals(obj1.foobar, 1000);
-assertEquals(desc.value, 1000);
-assertTrue(desc.configurable);
-assertFalse(desc.writable);
-assertFalse(desc.enumerable);
-assertEquals(desc.get, undefined);
-assertEquals(desc.set, undefined);
-//Try writing to non writable attribute - should remain 1000
-obj1.foobar = 1001;
-assertEquals(obj1.foobar, 1000);
-
-
-// Redefine to writable descriptor - now writing to foobar should be allowed.
-assertTrue(Reflect.defineProperty(obj1, "foobar", dataWritable));
-desc = Object.getOwnPropertyDescriptor(obj1, "foobar");
-assertEquals(obj1.foobar, 3000);
-assertEquals(desc.value, 3000);
-// Note that since dataWritable does not define configurable the configurable
-// setting from the redefined property (in this case true) is used.
-assertTrue(desc.configurable);
-assertTrue(desc.writable);
-assertFalse(desc.enumerable);
-assertEquals(desc.get, undefined);
-assertEquals(desc.set, undefined);
-// Writing to the property should now be allowed
-obj1.foobar = 1001;
-assertEquals(obj1.foobar, 1001);
-
-
-// Redefine with non configurable data property.
-assertTrue(Reflect.defineProperty(obj1, "foobar", dataNoConfigurable));
-desc = Object.getOwnPropertyDescriptor(obj1, "foobar");
-assertEquals(obj1.foobar, 2000);
-assertEquals(desc.value, 2000);
-assertFalse(desc.configurable);
-assertTrue(desc.writable);
-assertFalse(desc.enumerable);
-assertEquals(desc.get, undefined);
-assertEquals(desc.set, undefined);
-
-// Try redefine again - shold fail because configurable is now false.
-assertFalse(Reflect.defineProperty(obj1, "foobar", dataConfigurable));
-
-// Try redefine again with accessor property - shold also fail.
-assertFalse(Reflect.defineProperty(obj1, "foobar", dataConfigurable));
-
-
-// Redifine with the same descriptor - should succeed (step 6).
-assertTrue(Reflect.defineProperty(obj1, "foobar", dataNoConfigurable));
-desc = Object.getOwnPropertyDescriptor(obj1, "foobar");
-assertEquals(obj1.foobar, 2000);
-assertEquals(desc.value, 2000);
-assertFalse(desc.configurable);
-assertTrue(desc.writable);
-assertFalse(desc.enumerable);
-assertEquals(desc.get, undefined);
-assertEquals(desc.set, undefined);
-
-
-// New object
-var obj2 = {};
-
-// Make accessor - redefine to data
-assertTrue(Reflect.defineProperty(obj2, "foo", accessorConfigurable));
-
-// Redefine to data property
-assertTrue(Reflect.defineProperty(obj2, "foo", dataConfigurable));
-desc = Object.getOwnPropertyDescriptor(obj2, "foo");
-assertEquals(obj2.foo, 1000);
-assertEquals(desc.value, 1000);
-assertTrue(desc.configurable);
-assertFalse(desc.writable);
-assertFalse(desc.enumerable);
-assertEquals(desc.get, undefined);
-assertEquals(desc.set, undefined);
-
-
-// Redefine back to accessor
-assertTrue(Reflect.defineProperty(obj2, "foo", accessorConfigurable));
-desc = Object.getOwnPropertyDescriptor(obj2, "foo");
-assertTrue(desc.configurable);
-assertFalse(desc.enumerable);
-assertEquals(desc.writable, undefined);
-assertEquals(desc.get, accessorConfigurable.get);
-assertEquals(desc.set, accessorConfigurable.set);
-assertEquals(desc.value, undefined);
-assertEquals(1, obj2.foo = 1);
-assertEquals(3, val1);
-assertEquals(4, val2);
-assertEquals(3, obj2.foo);
-
-// Make data - redefine to accessor
-assertTrue(Reflect.defineProperty(obj2, "bar", dataConfigurable))
-
-// Redefine to accessor property
-assertTrue(Reflect.defineProperty(obj2, "bar", accessorConfigurable));
-desc = Object.getOwnPropertyDescriptor(obj2, "bar");
-assertTrue(desc.configurable);
-assertFalse(desc.enumerable);
-assertEquals(desc.writable, undefined);
-assertEquals(desc.get, accessorConfigurable.get);
-assertEquals(desc.set, accessorConfigurable.set);
-assertEquals(desc.value, undefined);
-assertEquals(1, obj2.bar = 1);
-assertEquals(4, val1);
-assertEquals(4, val2);
-assertEquals(4, obj2.foo);
-
-// Redefine back to data property
-assertTrue(Reflect.defineProperty(obj2, "bar", dataConfigurable));
-desc = Object.getOwnPropertyDescriptor(obj2, "bar");
-assertEquals(obj2.bar, 1000);
-assertEquals(desc.value, 1000);
-assertTrue(desc.configurable);
-assertFalse(desc.writable);
-assertFalse(desc.enumerable);
-assertEquals(desc.get, undefined);
-assertEquals(desc.set, undefined);
-
-
-// Redefinition of an accessor defined using __defineGetter__ and
-// __defineSetter__.
-function get(){return this.x}
-function set(x){this.x=x};
-
-var obj3 = {x:1000};
-obj3.__defineGetter__("foo", get);
-obj3.__defineSetter__("foo", set);
-
-desc = Object.getOwnPropertyDescriptor(obj3, "foo");
-assertTrue(desc.configurable);
-assertTrue(desc.enumerable);
-assertEquals(desc.writable, undefined);
-assertEquals(desc.get, get);
-assertEquals(desc.set, set);
-assertEquals(desc.value, undefined);
-assertEquals(1, obj3.foo = 1);
-assertEquals(1, obj3.x);
-assertEquals(1, obj3.foo);
-
-// Redefine to accessor property (non configurable) - note that enumerable
-// which we do not redefine should remain the same (true).
-assertTrue(Reflect.defineProperty(obj3, "foo", accessorNoConfigurable));
-desc = Object.getOwnPropertyDescriptor(obj3, "foo");
-assertFalse(desc.configurable);
-assertTrue(desc.enumerable);
-assertEquals(desc.writable, undefined);
-assertEquals(desc.get, accessorNoConfigurable.get);
-assertEquals(desc.set, accessorNoConfigurable.set);
-assertEquals(desc.value, undefined);
-assertEquals(1, obj3.foo = 1);
-assertEquals(5, val2);
-assertEquals(5, obj3.foo);
-
-
-obj3.__defineGetter__("bar", get);
-obj3.__defineSetter__("bar", set);
-
-
-// Redefine back to data property
-assertTrue(Reflect.defineProperty(obj3, "bar", dataConfigurable));
-desc = Object.getOwnPropertyDescriptor(obj3, "bar");
-assertEquals(obj3.bar, 1000);
-assertEquals(desc.value, 1000);
-assertTrue(desc.configurable);
-assertFalse(desc.writable);
-assertTrue(desc.enumerable);
-assertEquals(desc.get, undefined);
-assertEquals(desc.set, undefined);
-
-
-var obj4 = {};
-var func = function (){return 42;};
-obj4.bar = func;
-assertEquals(42, obj4.bar());
-
-assertTrue(Reflect.defineProperty(obj4, "bar", accessorConfigurable));
-desc = Object.getOwnPropertyDescriptor(obj4, "bar");
-assertTrue(desc.configurable);
-assertTrue(desc.enumerable);
-assertEquals(desc.writable, undefined);
-assertEquals(desc.get, accessorConfigurable.get);
-assertEquals(desc.set, accessorConfigurable.set);
-assertEquals(desc.value, undefined);
-assertEquals(1, obj4.bar = 1);
-assertEquals(5, val1);
-assertEquals(5, obj4.bar);
-
-// Make sure an error is thrown when trying to access to redefined function.
-try {
-  obj4.bar();
-  assertTrue(false);
-} catch (e) {
-  assertTrue(/is not a function/.test(e));
-}
-
-
-// Test runtime calls to DefineDataPropertyUnchecked and
-// DefineAccessorPropertyUnchecked - make sure we don't
-// crash.
-try {
-  %DefineAccessorPropertyUnchecked(0, 0, 0, 0, 0);
-} catch (e) {
-  assertTrue(/illegal access/.test(e));
-}
-
-try {
-  %DefineDataPropertyUnchecked(0, 0, 0, 0);
-} catch (e) {
-  assertTrue(/illegal access/.test(e));
-}
-
-try {
-  %DefineDataPropertyUnchecked(null, null, null, null);
-} catch (e) {
-  assertTrue(/illegal access/.test(e));
-}
-
-try {
-  %DefineAccessorPropertyUnchecked(null, null, null, null, null);
-} catch (e) {
-  assertTrue(/illegal access/.test(e));
-}
-
-try {
-  %DefineDataPropertyUnchecked({}, null, null, null);
-} catch (e) {
-  assertTrue(/illegal access/.test(e));
-}
-
-// Defining properties null should fail even when we have
-// other allowed values
-try {
-  %DefineAccessorPropertyUnchecked(null, 'foo', func, null, 0);
-} catch (e) {
-  assertTrue(/illegal access/.test(e));
-}
-
-try {
-  %DefineDataPropertyUnchecked(null, 'foo', 0, 0);
-} catch (e) {
-  assertTrue(/illegal access/.test(e));
-}
-
-// Test that all possible differences in step 6 in DefineOwnProperty are
-// exercised, i.e., any difference in the given property descriptor and the
-// existing properties should not return true, but throw an error if the
-// existing configurable property is false.
-
-var obj5 = {};
-// Enumerable will default to false.
-assertTrue(Reflect.defineProperty(obj5, 'foo', accessorNoConfigurable));
-desc = Object.getOwnPropertyDescriptor(obj5, 'foo');
-// First, test that we are actually allowed to set the accessor if all
-// values are of the descriptor are the same as the existing one.
-assertTrue(Reflect.defineProperty(obj5, 'foo', accessorNoConfigurable));
-
-// Different setter.
-var descDifferent = {
-  configurable:false,
-  enumerable:false,
-  set: setter1,
-  get: getter2
-};
-
-assertFalse(Reflect.defineProperty(obj5, 'foo', descDifferent));
-
-// Different getter.
-descDifferent = {
-  configurable:false,
-  enumerable:false,
-  set: setter2,
-  get: getter1
-};
-
-assertFalse(Reflect.defineProperty(obj5, 'foo', descDifferent));
-
-// Different enumerable.
-descDifferent = {
-  configurable:false,
-  enumerable:true,
-  set: setter2,
-  get: getter2
-};
-
-assertFalse(Reflect.defineProperty(obj5, 'foo', descDifferent));
-
-// Different configurable.
-descDifferent = {
-  configurable:false,
-  enumerable:true,
-  set: setter2,
-  get: getter2
-};
-
-assertFalse(Reflect.defineProperty(obj5, 'foo', descDifferent));
-
-// No difference.
-descDifferent = {
-  configurable:false,
-  enumerable:false,
-  set: setter2,
-  get: getter2
-};
-// Make sure we can still redefine if all properties are the same.
-assertTrue(Reflect.defineProperty(obj5, 'foo', descDifferent));
-
-// Make sure that obj5 still holds the original values.
-desc = Object.getOwnPropertyDescriptor(obj5, 'foo');
-assertEquals(desc.get, getter2);
-assertEquals(desc.set, setter2);
-assertFalse(desc.enumerable);
-assertFalse(desc.configurable);
-
-
-// Also exercise step 6 on data property, writable and enumerable
-// defaults to false.
-assertTrue(Reflect.defineProperty(obj5, 'bar', dataNoConfigurable));
-
-// Test that redefinition with the same property descriptor is possible
-assertTrue(Reflect.defineProperty(obj5, 'bar', dataNoConfigurable));
-
-// Different value.
-descDifferent = {
-  configurable:false,
-  enumerable:false,
-  writable: false,
-  value: 1999
-};
-
-assertFalse(Reflect.defineProperty(obj5, 'bar', descDifferent));
-
-// Different writable.
-descDifferent = {
-  configurable:false,
-  enumerable:false,
-  writable: true,
-  value: 2000
-};
-
-assertFalse(Reflect.defineProperty(obj5, 'bar', descDifferent));
-
-
-// Different enumerable.
-descDifferent = {
-  configurable:false,
-  enumerable:true ,
-  writable:false,
-  value: 2000
-};
-
-assertFalse(Reflect.defineProperty(obj5, 'bar', descDifferent));
-
-
-// Different configurable.
-descDifferent = {
-  configurable:true,
-  enumerable:false,
-  writable:false,
-  value: 2000
-};
-
-assertFalse(Reflect.defineProperty(obj5, 'bar', descDifferent));
-
-// No difference.
-descDifferent = {
-  configurable:false,
-  enumerable:false,
-  writable:false,
-  value:2000
-};
-// Make sure we can still redefine if all properties are the same.
-assertTrue(Reflect.defineProperty(obj5, 'bar', descDifferent));
-
-// Make sure that obj5 still holds the original values.
-desc = Object.getOwnPropertyDescriptor(obj5, 'bar');
-assertEquals(desc.value, 2000);
-assertFalse(desc.writable);
-assertFalse(desc.enumerable);
-assertFalse(desc.configurable);
-
-
-// Make sure that we can't overwrite +0 with -0 and vice versa.
-var descMinusZero = {value: -0, configurable: false};
-var descPlusZero = {value: +0, configurable: false};
-
-assertTrue(Reflect.defineProperty(obj5, 'minuszero', descMinusZero));
-
-// Make sure we can redefine with -0.
-assertTrue(Reflect.defineProperty(obj5, 'minuszero', descMinusZero));
-
-assertFalse(Reflect.defineProperty(obj5, 'minuszero', descPlusZero));
-
-
-assertTrue(Reflect.defineProperty(obj5, 'pluszero', descPlusZero));
-
-// Make sure we can redefine with +0.
-assertTrue(Reflect.defineProperty(obj5, 'pluszero', descPlusZero));
-
-assertFalse(Reflect.defineProperty(obj5, 'pluszero', descMinusZero));
-
-
-var obj6 = {};
-obj6[1] = 'foo';
-obj6[2] = 'bar';
-obj6[3] = '42';
-obj6[4] = '43';
-obj6[5] = '44';
-
-var descElement = { value: 'foobar' };
-var descElementNonConfigurable = { value: 'barfoo', configurable: false };
-var descElementNonWritable = { value: 'foofoo', writable: false };
-var descElementNonEnumerable = { value: 'barbar', enumerable: false };
-var descElementAllFalse = { value: 'foofalse',
-                            configurable: false,
-                            writable: false,
-                            enumerable: false };
-
-
-// Redefine existing property.
-assertTrue(Reflect.defineProperty(obj6, '1', descElement));
-desc = Object.getOwnPropertyDescriptor(obj6, '1');
-assertEquals(desc.value, 'foobar');
-assertTrue(desc.writable);
-assertTrue(desc.enumerable);
-assertTrue(desc.configurable);
-
-// Redefine existing property with configurable: false.
-assertTrue(Reflect.defineProperty(obj6, '2', descElementNonConfigurable));
-desc = Object.getOwnPropertyDescriptor(obj6, '2');
-assertEquals(desc.value, 'barfoo');
-assertTrue(desc.writable);
-assertTrue(desc.enumerable);
-assertFalse(desc.configurable);
-
-// Can use defineProperty to change the value of a non
-// configurable property.
-try {
-  assertTrue(Reflect.defineProperty(obj6, '2', descElement));
-  desc = Object.getOwnPropertyDescriptor(obj6, '2');
-  assertEquals(desc.value, 'foobar');
-} catch (e) {
-  assertUnreachable();
-}
-
-// Ensure that we can't change the descriptor of a
-// non configurable property.
-var descAccessor = { get: function() { return 0; } };
-assertFalse(Reflect.defineProperty(obj6, '2', descAccessor));
-
-assertTrue(Reflect.defineProperty(obj6, '2', descElementNonWritable));
-desc = Object.getOwnPropertyDescriptor(obj6, '2');
-assertEquals(desc.value, 'foofoo');
-assertFalse(desc.writable);
-assertTrue(desc.enumerable);
-assertFalse(desc.configurable);
-
-assertTrue(Reflect.defineProperty(obj6, '3', descElementNonWritable));
-desc = Object.getOwnPropertyDescriptor(obj6, '3');
-assertEquals(desc.value, 'foofoo');
-assertFalse(desc.writable);
-assertTrue(desc.enumerable);
-assertTrue(desc.configurable);
-
-// Redefine existing property with configurable: false.
-assertTrue(Reflect.defineProperty(obj6, '4', descElementNonEnumerable));
-desc = Object.getOwnPropertyDescriptor(obj6, '4');
-assertEquals(desc.value, 'barbar');
-assertTrue(desc.writable);
-assertFalse(desc.enumerable);
-assertTrue(desc.configurable);
-
-// Redefine existing property with configurable: false.
-assertTrue(Reflect.defineProperty(obj6, '5', descElementAllFalse));
-desc = Object.getOwnPropertyDescriptor(obj6, '5');
-assertEquals(desc.value, 'foofalse');
-assertFalse(desc.writable);
-assertFalse(desc.enumerable);
-assertFalse(desc.configurable);
-
-// Define non existing property - all attributes should default to false.
-assertTrue(Reflect.defineProperty(obj6, '15', descElement));
-desc = Object.getOwnPropertyDescriptor(obj6, '15');
-assertEquals(desc.value, 'foobar');
-assertFalse(desc.writable);
-assertFalse(desc.enumerable);
-assertFalse(desc.configurable);
-
-// Make sure that we can't redefine using direct access.
-obj6[15] ='overwrite';
-assertEquals(obj6[15],'foobar');
-
-
-// Repeat the above tests on an array.
-var arr = new Array();
-arr[1] = 'foo';
-arr[2] = 'bar';
-arr[3] = '42';
-arr[4] = '43';
-arr[5] = '44';
-
-var descElement = { value: 'foobar' };
-var descElementNonConfigurable = { value: 'barfoo', configurable: false };
-var descElementNonWritable = { value: 'foofoo', writable: false };
-var descElementNonEnumerable = { value: 'barbar', enumerable: false };
-var descElementAllFalse = { value: 'foofalse',
-                            configurable: false,
-                            writable: false,
-                            enumerable: false };
-
-
-// Redefine existing property.
-assertTrue(Reflect.defineProperty(arr, '1', descElement));
-desc = Object.getOwnPropertyDescriptor(arr, '1');
-assertEquals(desc.value, 'foobar');
-assertTrue(desc.writable);
-assertTrue(desc.enumerable);
-assertTrue(desc.configurable);
-
-// Redefine existing property with configurable: false.
-assertTrue(Reflect.defineProperty(arr, '2', descElementNonConfigurable));
-desc = Object.getOwnPropertyDescriptor(arr, '2');
-assertEquals(desc.value, 'barfoo');
-assertTrue(desc.writable);
-assertTrue(desc.enumerable);
-assertFalse(desc.configurable);
-
-// Can use defineProperty to change the value of a non
-// configurable property of an array.
-try {
-  assertTrue(Reflect.defineProperty(arr, '2', descElement));
-  desc = Object.getOwnPropertyDescriptor(arr, '2');
-  assertEquals(desc.value, 'foobar');
-} catch (e) {
-  assertUnreachable();
-}
-
-// Ensure that we can't change the descriptor of a
-// non configurable property.
-var descAccessor = { get: function() { return 0; } };
-assertFalse(Reflect.defineProperty(arr, '2', descAccessor));
-
-assertTrue(Reflect.defineProperty(arr, '2', descElementNonWritable));
-desc = Object.getOwnPropertyDescriptor(arr, '2');
-assertEquals(desc.value, 'foofoo');
-assertFalse(desc.writable);
-assertTrue(desc.enumerable);
-assertFalse(desc.configurable);
-
-assertTrue(Reflect.defineProperty(arr, '3', descElementNonWritable));
-desc = Object.getOwnPropertyDescriptor(arr, '3');
-assertEquals(desc.value, 'foofoo');
-assertFalse(desc.writable);
-assertTrue(desc.enumerable);
-assertTrue(desc.configurable);
-
-// Redefine existing property with configurable: false.
-assertTrue(Reflect.defineProperty(arr, '4', descElementNonEnumerable));
-desc = Object.getOwnPropertyDescriptor(arr, '4');
-assertEquals(desc.value, 'barbar');
-assertTrue(desc.writable);
-assertFalse(desc.enumerable);
-assertTrue(desc.configurable);
-
-// Redefine existing property with configurable: false.
-assertTrue(Reflect.defineProperty(arr, '5', descElementAllFalse));
-desc = Object.getOwnPropertyDescriptor(arr, '5');
-assertEquals(desc.value, 'foofalse');
-assertFalse(desc.writable);
-assertFalse(desc.enumerable);
-assertFalse(desc.configurable);
-
-// Define non existing property - all attributes should default to false.
-assertTrue(Reflect.defineProperty(arr, '15', descElement));
-desc = Object.getOwnPropertyDescriptor(arr, '15');
-assertEquals(desc.value, 'foobar');
-assertFalse(desc.writable);
-assertFalse(desc.enumerable);
-assertFalse(desc.configurable);
-
-// Define non-array property, check that .length is unaffected.
-assertEquals(16, arr.length);
-assertTrue(Reflect.defineProperty(arr, '0x20', descElement));
-assertEquals(16, arr.length);
-
-// See issue 968: http://code.google.com/p/v8/issues/detail?id=968
-var o = { x : 42 };
-assertTrue(Reflect.defineProperty(o, "x", { writable: false }));
-assertEquals(42, o.x);
-o.x = 37;
-assertEquals(42, o.x);
-
-o = { x : 42 };
-assertTrue(Reflect.defineProperty(o, "x", {}));
-assertEquals(42, o.x);
-o.x = 37;
-// Writability is preserved.
-assertEquals(37, o.x);
-
-var o = { };
-assertTrue(Reflect.defineProperty(o, "x", { writable: false }));
-assertEquals(undefined, o.x);
-o.x = 37;
-assertEquals(undefined, o.x);
-
-o = { get x() { return 87; } };
-assertTrue(Reflect.defineProperty(o, "x", { writable: false }));
-assertEquals(undefined, o.x);
-o.x = 37;
-assertEquals(undefined, o.x);
-
-// Ignore inherited properties.
-o = { __proto__ : { x : 87 } };
-assertTrue(Reflect.defineProperty(o, "x", { writable: false }));
-assertEquals(undefined, o.x);
-o.x = 37;
-assertEquals(undefined, o.x);
-
-function testDefineProperty(obj, propertyName, desc, resultDesc) {
-  assertTrue(Reflect.defineProperty(obj, propertyName, desc));
-  var actualDesc = Object.getOwnPropertyDescriptor(obj, propertyName);
-  assertEquals(resultDesc.enumerable, actualDesc.enumerable);
-  assertEquals(resultDesc.configurable, actualDesc.configurable);
-  if (resultDesc.hasOwnProperty('value')) {
-    assertEquals(resultDesc.value, actualDesc.value);
-    assertEquals(resultDesc.writable, actualDesc.writable);
-    assertFalse(resultDesc.hasOwnProperty('get'));
-    assertFalse(resultDesc.hasOwnProperty('set'));
-  } else {
-    assertEquals(resultDesc.get, actualDesc.get);
-    assertEquals(resultDesc.set, actualDesc.set);
-    assertFalse(resultDesc.hasOwnProperty('value'));
-    assertFalse(resultDesc.hasOwnProperty('writable'));
-  }
-}
-
-// tests redefining existing property with a generic descriptor
-o = { p : 42 };
-testDefineProperty(o, 'p',
-  { },
-  { value : 42, writable : true, enumerable : true, configurable : true });
-
-o = { p : 42 };
-testDefineProperty(o, 'p',
-  { enumerable : true },
-  { value : 42, writable : true, enumerable : true, configurable : true });
-
-o = { p : 42 };
-testDefineProperty(o, 'p',
-  { configurable : true },
-  { value : 42, writable : true, enumerable : true, configurable : true });
-
-o = { p : 42 };
-testDefineProperty(o, 'p',
-  { enumerable : false },
-  { value : 42, writable : true, enumerable : false, configurable : true });
-
-o = { p : 42 };
-testDefineProperty(o, 'p',
-  { configurable : false },
-  { value : 42, writable : true, enumerable : true, configurable : false });
-
-o = { p : 42 };
-testDefineProperty(o, 'p',
-  { enumerable : true, configurable : true },
-  { value : 42, writable : true, enumerable : true, configurable : true });
-
-o = { p : 42 };
-testDefineProperty(o, 'p',
-  { enumerable : false, configurable : true },
-  { value : 42, writable : true, enumerable : false, configurable : true });
-
-o = { p : 42 };
-testDefineProperty(o, 'p',
-  { enumerable : true, configurable : false },
-  { value : 42, writable : true, enumerable : true, configurable : false });
-
-o = { p : 42 };
-testDefineProperty(o, 'p',
-  { enumerable : false, configurable : false },
-  { value : 42, writable : true, enumerable : false, configurable : false });
-
-// can make a writable, non-configurable field non-writable
-o = { p : 42 };
-assertTrue(Reflect.defineProperty(o, 'p', { configurable: false }));
-testDefineProperty(o, 'p',
-  { writable: false },
-  { value : 42, writable : false, enumerable : true, configurable : false });
-
-// redefine of get only property with generic descriptor
-o = {};
-assertTrue(Reflect.defineProperty(o, 'p',
-  { get : getter1, enumerable: true, configurable: true }));
-testDefineProperty(o, 'p',
-  { enumerable : false, configurable : false },
-  { get: getter1, set: undefined, enumerable : false, configurable : false });
-
-// redefine of get/set only property with generic descriptor
-o = {};
-assertTrue(Reflect.defineProperty(o, 'p',
-  { get: getter1, set: setter1, enumerable: true, configurable: true }));
-testDefineProperty(o, 'p',
-  { enumerable : false, configurable : false },
-  { get: getter1, set: setter1, enumerable : false, configurable : false });
-
-// redefine of set only property with generic descriptor
-o = {};
-assertTrue(Reflect.defineProperty(o, 'p',
-  { set : setter1, enumerable: true, configurable: true }));
-testDefineProperty(o, 'p',
-  { enumerable : false, configurable : false },
-  { get: undefined, set: setter1, enumerable : false, configurable : false });
-
-
-// Regression test: Ensure that growing dictionaries are not ignored.
-o = {};
-for (var i = 0; i < 1000; i++) {
-  // Non-enumerable property forces dictionary mode.
-  assertTrue(Reflect.defineProperty(o, i, {value: i, enumerable: false}));
-}
-assertEquals(999, o[999]);
-
-
-// Regression test: Bizzare behavior on non-strict arguments object.
-// TODO(yangguo): Tests disabled, needs investigation!
-/*
-(function test(arg0) {
-  // Here arguments[0] is a fast alias on arg0.
-  Reflect.defineProperty(arguments, "0", {
-    value:1,
-    enumerable:false
-  });
-  // Here arguments[0] is a slow alias on arg0.
-  Reflect.defineProperty(arguments, "0", {
-    value:2,
-    writable:false
-  });
-  // Here arguments[0] is no alias at all.
-  Reflect.defineProperty(arguments, "0", {
-    value:3
-  });
-  assertEquals(2, arg0);
-  assertEquals(3, arguments[0]);
-})(0);
-*/
-
-// Regression test: We should never observe the hole value.
-var objectWithGetter = {};
-objectWithGetter.__defineGetter__('foo', function() {});
-assertEquals(undefined, objectWithGetter.__lookupSetter__('foo'));
-
-var objectWithSetter = {};
-objectWithSetter.__defineSetter__('foo', function(x) {});
-assertEquals(undefined, objectWithSetter.__lookupGetter__('foo'));
-
-// An object with a getter on the prototype chain.
-function getter() { return 111; }
-function anotherGetter() { return 222; }
-
-function testGetterOnProto(expected, o) {
-  assertEquals(expected, o.quebec);
-}
-
-obj1 = {};
-assertTrue(
-  Reflect.defineProperty(obj1, "quebec", { get: getter, configurable: true }));
-obj2 = Object.create(obj1);
-obj3 = Object.create(obj2);
-
-testGetterOnProto(111, obj3);
-testGetterOnProto(111, obj3);
-%OptimizeFunctionOnNextCall(testGetterOnProto);
-testGetterOnProto(111, obj3);
-testGetterOnProto(111, obj3);
-
-assertTrue(Reflect.defineProperty(obj1, "quebec", { get: anotherGetter }));
-
-testGetterOnProto(222, obj3);
-testGetterOnProto(222, obj3);
-%OptimizeFunctionOnNextCall(testGetterOnProto);
-testGetterOnProto(222, obj3);
-testGetterOnProto(222, obj3);
-
-// An object with a setter on the prototype chain.
-var modifyMe;
-function setter(x) { modifyMe = x+1; }
-function anotherSetter(x) { modifyMe = x+2; }
-
-function testSetterOnProto(expected, o) {
-  modifyMe = 333;
-  o.romeo = 444;
-  assertEquals(expected, modifyMe);
-}
-
-obj1 = {};
-assertTrue(
-  Reflect.defineProperty(obj1, "romeo", { set: setter, configurable: true }));
-obj2 = Object.create(obj1);
-obj3 = Object.create(obj2);
-
-testSetterOnProto(445, obj3);
-testSetterOnProto(445, obj3);
-%OptimizeFunctionOnNextCall(testSetterOnProto);
-testSetterOnProto(445, obj3);
-testSetterOnProto(445, obj3);
-
-assertTrue(Reflect.defineProperty(obj1, "romeo", { set: anotherSetter }));
-
-testSetterOnProto(446, obj3);
-testSetterOnProto(446, obj3);
-%OptimizeFunctionOnNextCall(testSetterOnProto);
-testSetterOnProto(446, obj3);
-testSetterOnProto(446, obj3);
-
-// Removing a setter on the prototype chain.
-function testSetterOnProtoStrict(o) {
-  "use strict";
-  o.sierra = 12345;
-}
-
-obj1 = {};
-assertTrue(Reflect.defineProperty(obj1, "sierra",
-                      { get: getter, set: setter, configurable: true }));
-obj2 = Object.create(obj1);
-obj3 = Object.create(obj2);
-
-testSetterOnProtoStrict(obj3);
-testSetterOnProtoStrict(obj3);
-%OptimizeFunctionOnNextCall(testSetterOnProtoStrict);
-testSetterOnProtoStrict(obj3);
-testSetterOnProtoStrict(obj3);
-
-assertTrue(Reflect.defineProperty(obj1, "sierra",
-                      { get: getter, set: undefined, configurable: true }));
-
-exception = false;
-try {
-  testSetterOnProtoStrict(obj3);
-} catch (e) {
-  exception = true;
-  assertTrue(/which has only a getter/.test(e));
-}
-assertTrue(exception);
-
-// Test assignment to a getter-only property on the prototype chain. This makes
-// sure that crankshaft re-checks its assumptions and doesn't rely only on type
-// feedback (which would be monomorphic here).
-
-function Assign(o) {
-  o.blubb = 123;
-}
-
-function C() {}
-
-Assign(new C);
-Assign(new C);
-%OptimizeFunctionOnNextCall(Assign);
-assertTrue(
-  Reflect.defineProperty(C.prototype, "blubb", {get: function() {return -42}}));
-Assign(new C);
-
-// Test that changes to the prototype of a simple constructor are not ignored,
-// even after creating initial instances.
-function C() {
-  this.x = 23;
-}
-assertEquals(23, new C().x);
-C.prototype.__defineSetter__('x', function(value) { this.y = 23; });
-assertEquals(void 0, new C().x);