test that pool_connection conect time error is propagated to pool user

Author: sidorares

test/integration/test-pool-connect-error.js

@@ -0,0 +1,54 @@
+var util = require('util');
+var mysql = require('../../index.js');
+var Command = require('../../lib/commands/command.js');
+var Packets = require('../../lib/packets/index.js');
+
+var assert = require('assert');
+
+var server = mysql.createServer(function (conn) {
+  conn.serverHandshake({
+    protocolVersion: 10,
+    serverVersion: '5.6.10', //'node.js rocks',
+    connectionId: 1234,
+    statusFlags: 2,
+    characterSet: 8,
+    capabilityFlags: 0xffffff,
+    authCallback: function(params, cb) {
+      cb(null, { message: 'too many connections', code: 1040});
+    }
+  });
+});
+
+var err1, err2;
+
+var portfinder = require('portfinder');
+portfinder.getPort(function (err, port) {
+
+  server.listen(port);
+  var conn = mysql.createConnection({
+    user: 'test_user',
+    password: 'test',
+    database: 'test_database',
+    port: port
+  });
+  conn.on('error', function (err) {
+    err1 = err
+  });
+
+  var pool = mysql.createPool({
+    user: 'test_user',
+    password: 'test',
+    database: 'test_database',
+    port: port
+  });
+
+  pool.query('test sql', function (err, res, rows) {
+    err2 = err;
+  });
+
+});
+
+process.on('exit', function() {
+  assert.equal(err1.errno, 1040);
+  assert.equal(err2.errno, 1040);
+});