DOC-2848 added doc code sample for Cuckoo filter

tests/Doc/Cuckoo_tutorial.cs

@@ -0,0 +1,62 @@
+// EXAMPLE: cuckoo_tutorial
+// HIDE_START
+
+using NRedisStack.RedisStackCommands;
+using NRedisStack.Tests;
+using StackExchange.Redis;
+
+// HIDE_END
+
+// REMOVE_START
+namespace Doc;
+[Collection("DocsTests")]
+// REMOVE_END
+
+// HIDE_START
+public class Cuckoo_tutorial
+{
+
+    [SkipIfRedis(Is.OSSCluster)]
+    public void run()
+    {
+        var muxer = ConnectionMultiplexer.Connect("localhost:6379");
+        var db = muxer.GetDatabase();
+        //REMOVE_START
+        // Clear any keys here before using them in tests.
+        db.KeyDelete("bikes:models");
+        //REMOVE_END
+        // HIDE_END
+
+
+        // STEP_START cuckoo
+        bool res1 = db.CF().Reserve("bikes:models", 1000000);
+        Console.WriteLine(res1);    // >>> True
+
+        bool res2 = db.CF().Add("bikes:models", "Smoky Mountain Striker");
+        Console.WriteLine(res2);    // >>> True
+
+        bool res3 = db.CF().Exists("bikes:models", "Smoky Mountain Striker");
+        Console.WriteLine(res3);    // >>> True
+
+        bool res4 = db.CF().Exists("bikes:models", "Terrible Bike Name");
+        Console.WriteLine(res4);    // >>> False
+
+        bool res5 = db.CF().Del("bikes:models", "Smoky Mountain Striker");
+        Console.WriteLine(res5);    // >>> True
+        // STEP_END
+
+        // Tests for 'cuckoo' step.
+        // REMOVE_START
+        Assert.True(res1);
+        Assert.True(res2);
+        Assert.True(res3);
+        Assert.False(res4);
+        Assert.True(res5);
+        // REMOVE_END
+
+
+        // HIDE_START
+    }
+}
+// HIDE_END
+