mirror of https://github.com/tc39/test262.git
50 lines
1.3 KiB
JavaScript
50 lines
1.3 KiB
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-internalizejsonproperty
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description: >
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[[Delete]] does not remove non-configurable properties.
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If [[Delete]] is unsuccessful, no exception is thrown.
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info: |
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JSON.parse ( text [ , reviver ] )
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[...]
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7. If IsCallable(reviver) is true, then
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[...]
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d. Return ? InternalizeJSONProperty(root, rootName).
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InternalizeJSONProperty ( holder, name )
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1. Let val be ? Get(holder, name).
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2. If Type(val) is Object, then
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a. Let isArray be ? IsArray(val).
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b. If isArray is true, then
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[...]
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c. Else,
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i. Let keys be ? EnumerableOwnPropertyNames(val, "key").
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ii. For each String P in keys, do
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1. Let newElement be ? InternalizeJSONProperty(val, P).
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2. If newElement is undefined, then
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a. Perform ? val.[[Delete]](P).
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OrdinaryDelete ( O, P )
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[...]
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4. If desc.[[Configurable]] is true, then
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a. Remove the own property with name P from O.
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---*/
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var json = '{"a": 1, "b": 2}';
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var obj = JSON.parse(json, function(key, value) {
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if (key === 'a') {
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Object.defineProperty(this, 'b', {configurable: false});
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}
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if (key === 'b') return;
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return value;
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});
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assert.sameValue(obj.a, 1);
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assert(obj.hasOwnProperty('b'));
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assert.sameValue(obj.b, 2);
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