Fixed test reference

src/NzbDrone.Core/HealthCheck/Checks/MonoVersionCheck.cs

@@ -0,0 +1,49 @@
+using System;
+using System.Text.RegularExpressions;
+using NLog;
+using NzbDrone.Common.EnvironmentInfo;
+using NzbDrone.Common.Processes;
+
+namespace NzbDrone.Core.HealthCheck.Checks
+{
+    public class MonoVersionCheck : IProvideHealthCheck
+    {
+        private readonly IProcessProvider _processProvider;
+        private readonly Logger _logger;
+        private static readonly Regex VersionRegex = new Regex(@"(?<=\W)(?<version>\d+\.\d+\.\d+\.\d+)(?=\W)", RegexOptions.Compiled | RegexOptions.IgnoreCase);
+
+        public MonoVersionCheck(IProcessProvider processProvider, Logger logger)
+        {
+            _processProvider = processProvider;
+            _logger = logger;
+        }
+
+        public HealthCheck Check()
+        {
+            if (!OsInfo.IsMono)
+            {
+                return null;
+            }
+
+            var output = _processProvider.StartAndCapture("mono", "--version");
+
+            foreach (var line in output.Standard)
+            {
+                var versionMatch = VersionRegex.Match(line);
+
+                if (versionMatch.Success)
+                {
+                    var version = new Version(versionMatch.Groups["version"].Value);
+
+                    if (version >= new Version(3, 2))
+                    {
+                        _logger.Debug("mono version is 3.2 or better: {0}", version.ToString());
+                        return null;
+                    }
+                }
+            }
+
+            return new HealthCheck(HealthCheckResultType.Warning, "mono version is less than 3.2, upgrade for improved stability");
+        }
+    }
+}