--- /dev/null
+//
+// bug-4786.cs-
+// NUnit Test Cases for Mono.Data.Tds.Protocol.TdsConnectionPool
+//
+// Author:
+// Robert Wilkens <robwilkens@gmail.com>
+//
+// Copyright (C) 2012 Robert Wilkens (http://www.robssoftwareprojects.com)
+//
+// 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
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to
+// permit persons to whom the Software is furnished to do so, subject to
+// the following conditions:
+//
+// The above copyright notice and this permission notice shall be
+// included in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+//
+
+namespace bug4786test
+{
+
+ using NUnit.Framework;
+ using Mono.Data.Tds.Protocol;
+ using System;
+ using System.Net;
+ using System.Net.Sockets;
+
+
+ [TestFixture]
+ public class TdsConnectionPoolTest
+ {
+ //const string SERVER="robwilkenssql.db.6210828.hostedresource.com";
+ const string SERVER="localhost";
+ [Test]
+ public void CheckNullException()
+ {
+
+ //set up dummy sql listener, if there is a real sql server on this
+ //machine at that port, in theory this part will fail, but that's ok
+ //becuase something will be listening on the port and that's all we
+ //require at this point: a listener on port 1433...
+
+ try{
+ Socket Listener = new Socket(AddressFamily.InterNetwork,
+ SocketType.Stream,
+ ProtocolType.Tcp);
+ IPAddress hostIP =Dns.GetHostEntry("localhost").AddressList[0];
+ IPEndPoint ep = new IPEndPoint(hostIP, 1433);
+ Listener.Bind(ep);
+ Listener.Listen(1);
+ } catch (Exception){
+ //ignore
+ }
+
+ //try to connect twice, in earlier failure would get null exception
+ //on 2nd call to pool.GetConnection();
+ //Most of this code ripped from sqlConnection.Open()
+
+ TdsConnectionPool pool;
+
+ TdsConnectionPoolManager sqlConnectionPools =
+ new TdsConnectionPoolManager(TdsVersion.tds80);
+ TdsConnectionInfo info=
+ new TdsConnectionInfo(SERVER/*dummyhost*/,1433/*port*/,
+ 8192/*pktsize*/,15/*timeout*/,0/*minpoolsize*/,
+ 100/*maxpoolsize*/);
+ pool=sqlConnectionPools.GetConnectionPool("test",info);
+ Tds tds=null;
+
+ //this first one succeeded regardless as long as something answered
+ //the phone on port 1433 of localhost
+ tds=pool.GetConnection();
+
+ pool.ReleaseConnection(tds);
+
+
+ // 2nd time thru: This will fail with nullreferenceexception
+ // at pool.GetConnection() unless the patch by Rob Wilkens which
+ // adds "result=null;" before retry in pool.getConnection() source
+
+ //First let's pretend we're calling this test fresh, as if we
+ //call sqlConnection.Open() again :
+
+ info=new TdsConnectionInfo(SERVER/*dummyhost*/,1433/*port*/,
+ 8192/*pktsize*/,15/*timeout*/,0/*minpoolsize*/,
+ 100/*maxpoolsize*/);
+
+ pool=sqlConnectionPools.GetConnectionPool("test",info);
+
+ //Then: Test for failure (will raise uncaught exception which
+ //causes failure of test if bug is not fixed
+ tds=pool.GetConnection();
+
+ pool.ReleaseConnection(tds);
+
+ //exit
+ }
+ }
+}
+
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