Minor cleanup items.

Author: HarryCordewener

Core.Arango.Tests/Core/TestBase.cs

@@ -25,7 +25,7 @@ public abstract class TestBase : IAsyncLifetime
         private const string ClusterValue = "cluster";
 
         public IArangoContext Arango { get; protected set; }
-        public static Lazy<Task<IEnumerable<ArangoDbContainer>>> Containers = new(async () => 
+        private readonly static Lazy<Task<IEnumerable<ArangoDbContainer>>> Containers = new(async () => 
         Environment.GetEnvironmentVariable(ARANGODB_TOPOLOGY_ENVAR) == ClusterValue
             ? await SetupClusterServer()
             : await SetupSingleServer());
@@ -175,11 +175,11 @@ public async Task SetupAsync(string serializer, string createDatabase = "test")
             }
         }
 
-        protected string UniqueTestRealm()
+        protected static string UniqueTestRealm()
             // Last to get the Coordinators for clusters, or the only existing one for a single server.
             => $"Server={Containers.Value.Result.Last().GetTransportAddress()};User={DefaultImageUser};Realm=CI-{Guid.NewGuid():D};Password={DefaultImagePassword};";
 
-        protected void PrintQuery<T>(IQueryable<T> query, ITestOutputHelper output)
+        protected static void PrintQuery<T>(IQueryable<T> query, ITestOutputHelper output)
         {
             var aql = query.ToAql();
             output.WriteLine("QUERY:");

Core.Arango.Tests/IndexTest.cs

@@ -22,7 +22,7 @@ public async Task DropAll(string serializer)
 
             await Arango.Index.CreateAsync("test", "test", new ArangoIndex
             {
-                Fields = new List<string> {"test"},
+                Fields = ["test"],
                 Type = ArangoIndexType.Hash
             });