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// Copyright (C) 2015 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
es6id: 9.5.4
description: >
Throws a TypeError exception if boolean trap result is true and target is
extensible.
info: |
[[PreventExtensions]] ( )
...
10. If booleanTrapResult is true, then
...
c. If targetIsExtensible is true, throw a TypeError exception.
11. Return booleanTrapResult.
...
---*/
var p = new Proxy({}, {
preventExtensions: function(t) {
return true;
}
});
assert.throws(TypeError, function() {
Object.preventExtensions(p);
});
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