add test for create admin partition (G-Research#379)

Consul.Test/AdminPartitionTest.cs

@@ -0,0 +1,44 @@
+// -----------------------------------------------------------------------
+//  <copyright file="AdminPartitionTest.cs" company="G-Research Limited">
+//    Copyright 2020 G-Research Limited
+//
+//    Licensed under the Apache License, Version 2.0 (the "License"),
+//    you may not use this file except in compliance with the License.
+//    You may obtain a copy of the License at
+//
+//       http://www.apache.org/licenses/LICENSE-2.0
+//
+//    Unless required by applicable law or agreed to in writing, software
+//    distributed under the License is distributed on an "AS IS" BASIS,
+//    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+//    See the License for the specific language governing permissions and
+//    limitations under the License.
+//  </copyright>
+// -----------------------------------------------------------------------
+
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using NuGet.Versioning;
+using Xunit;
+
+namespace Consul.Test
+{
+    public class AdminPartitionTest : BaseFixture
+    {
+        [EnterpriseOnlyFact]
+        public async Task AdminPartition_CreateAdminPartition()
+        {
+            var cutOffVersion = SemanticVersion.Parse("1.11.0");
+            Skip.If(AgentVersion < cutOffVersion, $"Current version is {AgentVersion}, but `Admin Partition` is only supported from Consul {cutOffVersion}");
+
+            var check = new Partition { Name = "na-west", Description = "Partition for North America West" };
+
+            var request = await _client.AdminPartition.Create(check);
+
+            Assert.Equal(check.Name, request.Response.Name);
+        }
+    }
+}