auto-load redisearch.so for the FT tests

NRediSearch.Test/ExampleUsage.cs

-using System;
+using System;
 using Xunit;
 using StackExchange.Redis;
 using System.Collections.Generic;
 using System.Linq;
+using Xunit.Abstractions;
+using System.IO;
 
 namespace NRediSearch.Test
 {
@@ -10,10 +12,59 @@ public class ExampleUsage : IDisposable
     {
         private ConnectionMultiplexer conn;
         private IDatabase db;
-        public ExampleUsage()
+
+        private ITestOutputHelper Output { get; }
+        public ExampleUsage(ITestOutputHelper output)
         {
-            conn = ConnectionMultiplexer.Connect("127.0.0.1:6379");
+            Output = output;
+            const string ep = "127.0.0.1:6379";
+            var options = new ConfigurationOptions
+            {
+                EndPoints = {ep},
+                AllowAdmin = true
+            };
+            conn = ConnectionMultiplexer.Connect(options);
             db = conn.GetDatabase();
+
+            var server = conn.GetServer(ep);
+            var arr = (RedisResult[])server.Execute("module", "list");
+            bool found = false;
+            foreach(var module in arr)
+            {
+                var parsed = Parse(module);
+                if(parsed.TryGetValue("name", out var val) && val == "ft")
+                {
+                    found = true;
+                    if(parsed.TryGetValue("ver", out val))
+                        Output.WriteLine($"Version: {val}");
+                    break;
+                }      
+            }
+
+            if (!found)
+            {
+                Output.WriteLine("Module not found; attempting to load...");
+                var config = server.Info("server").SelectMany(_ => _).FirstOrDefault(x => x.Key == "config_file").Value;
+                if(!string.IsNullOrEmpty(config))
+                {
+                    var i = config.LastIndexOf('/');
+                    var modulePath = config.Substring(0, i + 1) + "redisearch.so";
+                    var result = server.Execute("module", "load", modulePath);
+                    Output.WriteLine((string)result);
+                }
+            }
+        }
+        static Dictionary<string, RedisValue> Parse(RedisResult module)
+        {
+            var data = new Dictionary<string, RedisValue>();
+            var lines = (RedisResult[])module;
+            for(int i = 0; i < lines.Length;)
+            {
+                var key = (string)lines[i++];
+                var value = (RedisValue)lines[i++];
+                data[key] = value;
+            }
+            return data;
         }
 
         public void Dispose()
@@ -48,8 +99,8 @@ public void BasicUsage()
                 {
                     Console.WriteLine(ex.Message);
                     Console.WriteLine("Module not installed, aborting");
-                    return; // the module isn't installed
                 }
+                throw;
             }
 
             Assert.True(result);