added custom IntConverter to get around the mono bug

http://json.codeplex.com/workitem/24176

NzbDrone.Core.Test/Download/DownloadClientTests/NzbgetProviderTests/DownloadNzbFixture.cs

@@ -4,6 +4,7 @@ using FizzWare.NBuilder;
 using Moq;
 using NUnit.Framework;
 using NzbDrone.Common;
+using NzbDrone.Common.Serializer;
 using NzbDrone.Core.Configuration;
 using NzbDrone.Core.Download.Clients.Nzbget;
 using NzbDrone.Core.Parser.Model;
@@ -51,9 +52,16 @@ namespace NzbDrone.Core.Test.Download.DownloadClientTests.NzbgetProviderTests
         [Test]
         public void should_add_item_to_queue()
         {
+
+            var command = new JsonRequest
+            {
+                Method = "appendurl",
+                Params = new object[] { "30.Rock.S01E01.Pilot.720p.hdtv.nzb", "TV", 50, false, "http://www.nzbdrone.com" }
+            };
+
             Mocker.GetMock<IHttpProvider>()
                     .Setup(s => s.PostCommand("192.168.5.55:6789", "nzbget", "pass",
-                        It.Is<String>(c => c.Equals("{\"method\":\"appendurl\",\"params\":[\"30.Rock.S01E01.Pilot.720p.hdtv.nzb\",\"TV\",50,false,\"http://www.nzbdrone.com\"]}"))))
+                        It.Is<String>(c => c.Equals(command.ToJson()))))
                     .Returns("{\"version\": \"1.1\",\"result\": true}");
 
             Mocker.Resolve<NzbgetClient>().DownloadNzb(_remoteEpisode);