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Make sure `constants` object and all the nested objects don't inherit from `Object.prototype` but from `null`. PR-URL: https://github.com/nodejs/node/pull/10458 Reviewed-By: James M Snell <jasnell@gmail.com> Reviewed-By: Jeremiah Senkpiel <fishrock123@rocketmail.com> Reviewed-By: Colin Ihrig <cjihrig@gmail.com> Reviewed-By: Brian White <mscdex@mscdex.net>
31 lines
877 B
JavaScript
31 lines
877 B
JavaScript
'use strict';
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require('../common');
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const constants = process.binding('constants');
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const assert = require('assert');
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assert.deepStrictEqual(
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Object.keys(constants).sort(), ['crypto', 'fs', 'os', 'zlib']
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);
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assert.deepStrictEqual(
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Object.keys(constants.os).sort(), ['UV_UDP_REUSEADDR', 'errno', 'signals']
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);
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// Make sure all the constants objects don't inherit from Object.prototype
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const inheritedProperties = Object.getOwnPropertyNames(Object.prototype);
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function test(obj) {
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assert(obj);
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assert.strictEqual(Object.prototype.toString.call(obj), '[object Object]');
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assert.strictEqual(Object.getPrototypeOf(obj), null);
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inheritedProperties.forEach((property) => {
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assert.strictEqual(property in obj, false);
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});
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}
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[
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constants, constants.crypto, constants.fs, constants.os, constants.zlib,
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constants.os.errno, constants.os.signals
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].forEach(test);
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