mirror of https://github.com/tc39/test262.git
30 lines
590 B
JavaScript
30 lines
590 B
JavaScript
|
// Copyright (C) 2019 Alexey Shvayka. All rights reserved.
|
||
|
|
// This code is governed by the BSD license found in the LICENSE file.
|
||
|
|
|
||
|
|
/*---
|
||
|
|
esid: sec-object.seal
|
||
|
|
description: >
|
||
|
|
O.[[PreventExtensions]]() returns abrupt completion.
|
||
|
|
info: |
|
||
|
|
Object.seal ( O )
|
||
|
|
|
||
|
|
...
|
||
|
|
2. Let status be ? SetIntegrityLevel(O, sealed).
|
||
|
|
|
||
|
|
SetIntegrityLevel ( O, level )
|
||
|
|
|
||
|
|
...
|
||
|
|
3. Let status be ? O.[[PreventExtensions]]().
|
||
|
|
features: [Proxy]
|
||
|
|
---*/
|
||
|
|
|
||
|
|
var p = new Proxy({}, {
|
||
|
|
preventExtensions: function() {
|
||
|
|
throw new Test262Error();
|
||
|
|
},
|
||
|
|
});
|
||
|
|
|
||
|
|
assert.throws(Test262Error, function() {
|
||
|
|
Object.seal(p);
|
||
|
|
});
|