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// 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
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// contributors may be used to endorse or promote products derived
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// Tests the Reflect.defineProperty method - ES6 26.1.3
// This is adapted from mjsunit/object-define-property.js.
// Flags: --allow-natives-syntax
// 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 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: Bizarre 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);
%PrepareFunctionForOptimization(testGetterOnProto);
testGetterOnProto(111, obj3);
testGetterOnProto(111, obj3);
%OptimizeFunctionOnNextCall(testGetterOnProto);
testGetterOnProto(111, obj3);
testGetterOnProto(111, obj3);
assertTrue(Reflect.defineProperty(obj1, "quebec", { get: anotherGetter }));
%PrepareFunctionForOptimization(testGetterOnProto);
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);
%PrepareFunctionForOptimization(testSetterOnProto);
testSetterOnProto(445, obj3);
testSetterOnProto(445, obj3);
%OptimizeFunctionOnNextCall(testSetterOnProto);
testSetterOnProto(445, obj3);
testSetterOnProto(445, obj3);
assertTrue(Reflect.defineProperty(obj1, "romeo", { set: anotherSetter }));
%PrepareFunctionForOptimization(testSetterOnProto);
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);
%PrepareFunctionForOptimization(testSetterOnProtoStrict);
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() {}
%PrepareFunctionForOptimization(Assign);
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);