1// Flags: --expose-internals 2'use strict'; 3 4require('../common'); 5const { internalBinding } = require('internal/test/binding'); 6const constants = internalBinding('constants'); 7const assert = require('assert'); 8 9assert.deepStrictEqual( 10 Object.keys(constants).sort(), ['crypto', 'fs', 'os', 'trace', 'zlib'] 11); 12 13assert.deepStrictEqual( 14 Object.keys(constants.os).sort(), ['UV_UDP_REUSEADDR', 'dlopen', 'errno', 15 'priority', 'signals'] 16); 17 18// Make sure all the constants objects don't inherit from Object.prototype 19const inheritedProperties = Object.getOwnPropertyNames(Object.prototype); 20function test(obj) { 21 assert(obj); 22 assert.strictEqual(Object.prototype.toString.call(obj), '[object Object]'); 23 assert.strictEqual(Object.getPrototypeOf(obj), null); 24 25 inheritedProperties.forEach((property) => { 26 assert.strictEqual(property in obj, false); 27 }); 28} 29 30[ 31 constants, constants.crypto, constants.fs, constants.os, constants.trace, 32 constants.zlib, constants.os.dlopen, constants.os.errno, constants.os.signals, 33].forEach(test); 34