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29 lines
660 B
JavaScript
29 lines
660 B
JavaScript
// Copyright (C) 2019 Ecma International. 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.freeze
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description: >
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Object.freeze throws if SetIntegrityLevel(O, frozen) returns false.
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info: |
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Object.freeze ( O )
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...
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2. Let status be ? SetIntegrityLevel(O, frozen).
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3. If status is false, throw a TypeError exception.
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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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4. If status is false, return false.
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---*/
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const p = new Proxy({}, {
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preventExtensions() {
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return false;
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},
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});
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assert.throws(TypeError, () => {
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Object.freeze(p);
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});
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