Source code
Revision control
Copy as Markdown
Other Tools
'use strict';
// Copyright (C) 2013 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
es6id: 19.1.2.4
description: >
Symbol used as property for default data property definition
flags: [onlyStrict]
features: [Symbol]
includes: [propertyHelper.js]
---*/
var sym = Symbol();
var obj = {};
Object.defineProperty(obj, sym, {
value: 1,
});
assert.sameValue(sym in obj, true, "The result of `sym in obj` is `true`");
verifyProperty(obj, sym, {
value: 1,
configurable: false,
writable: false,
enumerable: false,
});
assert.sameValue(
Object.prototype.propertyIsEnumerable.call(obj, sym),
false,
"`Object.prototype.propertyIsEnumerable.call(obj, sym)` returns `false`"
);
assert.throws(TypeError, function() {
delete obj[sym];
});
assert.notSameValue(
Object.getOwnPropertyDescriptor(obj, sym),
undefined,
"`Object.getOwnPropertyDescriptor(obj, sym)` does not return `undefined`"
);
assert.throws(TypeError, function() {
obj[sym] = 2;
});
assert.sameValue(obj[sym], 1, "The value of `obj[sym]` is `1`");
reportCompare(0, 0);