mirror of https://github.com/tc39/test262.git
51 lines
1.8 KiB
JavaScript
51 lines
1.8 KiB
JavaScript
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// Copyright (C) 2021 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.freeze
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description: >
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[[DefineOwnProperty]] is called with partial descriptor with only [[Configurable]] and
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[[Writable]] (for data properties only) fields present.
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info: |
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SetIntegrityLevel ( O, level )
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[...]
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5. Let keys be ? O.[[OwnPropertyKeys]]().
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[...]
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7. Else,
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a. Assert: level is frozen.
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b. For each element k of keys, do
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i. Let currentDesc be ? O.[[GetOwnProperty]](k).
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ii. If currentDesc is not undefined, then
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1. If IsAccessorDescriptor(currentDesc) is true, then
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a. Let desc be the PropertyDescriptor { [[Configurable]]: false }.
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2. Else,
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a. Let desc be the PropertyDescriptor { [[Configurable]]: false, [[Writable]]: false }.
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3. Perform ? DefinePropertyOrThrow(O, k, desc).
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features: [Symbol, Proxy, Reflect]
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---*/
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var sym = Symbol();
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var seenDescriptors = {};
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var proxy = new Proxy({
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[sym]: 1,
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get foo() {},
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set foo(_v) {},
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}, {
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defineProperty: function(target, key, descriptor) {
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seenDescriptors[key] = descriptor;
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return Reflect.defineProperty(target, key, descriptor);
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},
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});
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Object.freeze(proxy);
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assert.sameValue(seenDescriptors[sym].value, undefined, "value");
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assert.sameValue(seenDescriptors[sym].writable, false, "writable");
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assert.sameValue(seenDescriptors[sym].enumerable, undefined, "enumerable");
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assert.sameValue(seenDescriptors[sym].configurable, false, "configurable");
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assert.sameValue(seenDescriptors.foo.get, undefined, "get");
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assert.sameValue(seenDescriptors.foo.set, undefined, "set");
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assert.sameValue(seenDescriptors.foo.enumerable, undefined, "enumerable");
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assert.sameValue(seenDescriptors.foo.configurable, false, "configurable");
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