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