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'use strict';
const common = require('../common');
const assert = require('assert');
const net = require('net');
// Sets the server's maxConnections property to 1.
// Open 2 connections (connection 0 and connection 1).
// Connection 0 should be accepted.
// Connection 1 should be rejected.
// Closes connection 0.
// Open 2 more connections (connection 2 and 3).
// Connection 2 should be accepted.
// Connection 3 should be rejected.
const connections = [];
const received = [];
const sent = [];
const createConnection = function(index) {
console.error('creating connection ' + index);
return new Promise(function(resolve, reject) {
const connection = net.createConnection(server.address().port, function() {
const msg = '' + index;
console.error('sending message: ' + msg);
this.write(msg);
sent.push(msg);
});
connection.on('error', function(err) {
assert.equal(err.code, 'ECONNRESET');
resolve();
});
connection.on('data', function(e) {
console.error('connection ' + index + ' received response');
resolve();
});
connection.on('end', function() {
console.error('ending ' + index);
resolve();
});
connections[index] = connection;
});
};
const closeConnection = function(index) {
console.error('closing connection ' + index);
return new Promise(function(resolve, reject) {
connections[index].on('end', function() {
resolve();
});
connections[index].end();
});
};
const server = net.createServer(function(socket) {
socket.on('data', function(data) {
console.error('received message: ' + data);
received.push('' + data);
socket.write('acknowledged');
});
});
server.maxConnections = 1;
server.listen(0, function() {
createConnection(0)
.then(createConnection.bind(null, 1))
.then(closeConnection.bind(null, 0))
.then(createConnection.bind(null, 2))
.then(createConnection.bind(null, 3))
.then(server.close.bind(server))
.then(closeConnection.bind(null, 2));
});
process.on('exit', function() {
// Confirm that all connections tried to send data...
assert.deepStrictEqual(sent, ['0', '1', '2', '3']);
// ...but that only connections 0 and 2 were successful.
assert.deepStrictEqual(received, ['0', '2']);
});
process.on('unhandledRejection', function() {
console.error('promise rejected');
common.fail('A promise in the chain rejected');
});
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