--- /dev/null
+'use strict';
+var common = require('../common');
+var assert = require('assert');
+
+var 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.
+
+var connections = [];
+var received = [];
+var sent = [];
+
+var createConnection = function(index) {
+ console.error('creating connection ' + index);
+
+ return new Promise(function(resolve, reject) {
+ var connection = net.createConnection(common.PORT, function() {
+ var msg = '' + index;
+ console.error('sending message: ' + msg);
+ this.write(msg);
+ sent.push(msg);
+ });
+
+ connection.on('data', function(e) {
+ console.error('connection ' + index + ' received response');
+ resolve();
+ });
+
+ connection.on('end', function() {
+ console.error('ending ' + index);
+ resolve();
+ });
+
+ connections[index] = connection;
+ });
+};
+
+var closeConnection = function(index) {
+ console.error('closing connection ' + index);
+ return new Promise(function(resolve, reject) {
+ connections[index].on('end', function() {
+ resolve();
+ });
+ connections[index].end();
+ });
+};
+
+var 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(common.PORT, 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.deepEqual(sent, [0, 1, 2, 3]);
+ // ...but that only connections 0 and 2 were successful.
+ assert.deepEqual(received, [0, 2]);
+});
+
+process.on('unhandledRejection', function() {
+ console.error('promise rejected');
+ assert.fail(null, null, 'A promise in the chain rejected');
+});