'use strict'; const common = require('../common'); const assert = require('assert'); const dgram = require('dgram'); const socket = dgram.createSocket('udp4'); socket.bind(0); socket.on('listening', common.mustCall(() => { const result = socket.setTTL(16); assert.strictEqual(result, 16); common.expectsError(() => { socket.setTTL('foo'); }, { code: 'ERR_INVALID_ARG_TYPE', type: TypeError, message: 'The "ttl" argument must be of type number. Received type string' }); // TTL must be a number from > 0 to < 256 assert.throws(() => { socket.setTTL(1000); }, /^Error: setTTL EINVAL$/); socket.close(); }));