47 lines
1.2 KiB
JavaScript
47 lines
1.2 KiB
JavaScript
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// Copyright 2019 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Checks for security holes introduced by Object.property overrides.
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// For example:
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// Object.defineProperty(Array.prototype, 'locale', {
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// set: function(value) {
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// throw new Error('blah');
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// },
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// configurable: true,
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// enumerable: false
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// });
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//
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// would throw in case of (JS) x.locale = 'us' or (C++) x->Set('locale', 'us').
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//
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// First get supported properties.
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// Some of the properties are optional, so we request them.
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var properties = [];
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var options = Intl.DateTimeFormat(
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'en-US', {dateStyle: 'full'}).resolvedOptions();
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for (var prop in options) {
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if (options.hasOwnProperty(prop)) {
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properties.push(prop);
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}
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}
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// In the order of Table 6 of
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// ecma402 #sec-intl.datetimeformat.prototype.resolvedoptions
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var expectedProperties = [
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'locale',
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'calendar',
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'numberingSystem',
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'timeZone',
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'dateStyle',
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];
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assertEquals(expectedProperties.length, properties.length);
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properties.forEach(function(prop) {
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assertFalse(expectedProperties.indexOf(prop) === -1);
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});
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taintProperties(properties);
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var locale = Intl.DateTimeFormat().resolvedOptions().locale;
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