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'use strict'; const common = require('../common'); const assert = require('assert'); const dgram = require('dgram'); const client = dgram.createSocket('udp4'); const onMessage = common.mustCall(function(err, bytes) { assert.strictEqual(bytes, buf1.length + buf2.length); }); const buf1 = Buffer.alloc(256, 'x'); const buf2 = Buffer.alloc(256, 'y'); client.on('listening', function() { const toSend = [buf1, buf2]; client.send(toSend, this.address().port, common.localhostIPv4, onMessage); toSend.splice(0, 2); }); client.on('message', common.mustCall(function onMessage(buf, info) { const expected = Buffer.concat([buf1, buf2]); assert.ok(buf.equals(expected), 'message was received correctly'); client.close(); })); client.bind(0);