HLL unit tests

StackExchange.Redis.Tests/HyperLogLog.cs

+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using NUnit.Framework;
+
+namespace StackExchange.Redis.Tests
+{
+    [TestFixture]
+    public class HyperLogLog : TestBase
+    {
+        [Test]
+        public void SingleKeyLength()
+        {
+            using (var conn = Create())
+            {
+                var db = conn.GetDatabase();
+                RedisKey key = "hll1";
+
+                db.HyperLogLogAdd(key, "a");
+                db.HyperLogLogAdd(key, "b");
+                db.HyperLogLogAdd(key, "c");
+
+                Assert.IsTrue(db.HyperLogLogLength(key) > 0);
+            }
+        }
+
+        [Test]
+        public void MultiKeyLength()
+        {
+            using (var conn = Create(useSharedSocketManager: true))
+            {
+                var db = conn.GetDatabase();
+                RedisKey[] keys = { "hll1", "hll2", "hll3" };
+
+                db.HyperLogLogAdd(keys[0], "a");
+                db.HyperLogLogAdd(keys[1], "b");
+                db.HyperLogLogAdd(keys[2], "c");
+
+                Assert.IsTrue(db.HyperLogLogLength(keys) > 0);
+            }
+        }
+    }
+}

StackExchange.Redis.Tests/StackExchange.Redis.Tests.csproj

@@ -66,6 +66,7 @@
   <ItemGroup>
     <Compile Include="AsyncTests.cs" />
     <Compile Include="BasicOps.cs" />
+    <Compile Include="HyperLogLog.cs" />
     <Compile Include="WrapperBaseTests.cs" />
     <Compile Include="TransactionWrapperTests.cs" />
     <Compile Include="Bits.cs" />
@@ -128,11 +129,11 @@
     </ProjectReference>
   </ItemGroup>
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
-  <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
-       Other similar extension points exist, see Microsoft.Common.targets.
-  <Target Name="BeforeBuild">
-  </Target>
-  <Target Name="AfterBuild">
-  </Target>
+  <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
+       Other similar extension points exist, see Microsoft.Common.targets.
+  <Target Name="BeforeBuild">
+  </Target>
+  <Target Name="AfterBuild">
+  </Target>
   -->
 </Project>
\ No newline at end of file