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'use strict'; const common = require('../common'); const assert = require('assert'); const dgram = require('dgram'); const client = dgram.createSocket('udp4'); const chunk = 'abc'; let received = 0; let sent = 0; const limit = 10; let async = false; let port; function onsend() { if (sent++ < limit) { client.send(chunk, 0, chunk.length, port, common.localhostIPv4, onsend); } else { assert.strictEqual(async, true); } } client.on('listening', function() { port = this.address().port; process.nextTick(() => { async = true; }); onsend(); }); client.on('message', (buf, info) => { received++; if (received === limit) { client.close(); } }); client.on('close', common.mustCall(function() { assert.strictEqual(received, limit); })); client.bind(0);