denoland-deno/cli/tests/node_compat/test/parallel/test-net-write-slow.js

// deno-fmt-ignore-file
// deno-lint-ignore-file

// Copyright Joyent and Node contributors. All rights reserved. MIT license.
// Taken from Node 18.12.1
// This file is automatically generated by "node/_tools/setup.ts". Do not modify this file manually

// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
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// following conditions:
//
// The above copyright notice and this permission notice shall be included
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'use strict';
const common = require('../common');
const assert = require('assert');
const net = require('net');

const SIZE = 2E5;
const N = 10;
let flushed = 0;
let received = 0;
const buf = Buffer.alloc(SIZE, 'a');

const server = net.createServer(function(socket) {
  socket.setNoDelay();
  socket.setTimeout(9999);
  socket.on('timeout', function() {
    assert.fail(`flushed: ${flushed}, received: ${received}/${SIZE * N}`);
  });

  for (let i = 0; i < N; ++i) {
    socket.write(buf, function() {
      ++flushed;
      if (flushed === N) {
        socket.setTimeout(0);
      }
    });
  }
  socket.end();

}).listen(0, common.mustCall(function() {
  const conn = net.connect(this.address().port);
  conn.on('data', function(buf) {
    received += buf.length;
    conn.pause();
    setTimeout(function() {
      conn.resume();
    }, 20);
  });
  conn.on('end', common.mustCall(function() {
    server.close();
    assert.strictEqual(received, SIZE * N);
  }));
}));