add stream tests classes

Author: tanyarybina

ManagedCode.Storage.Tests/Storages/Azure/AzureBlobStreamTests.cs

@@ -0,0 +1,6 @@
+namespace ManagedCode.Storage.Tests.Storages.Azure;
+
+public class AzureBlobStreamTests
+{
+    
+}

ManagedCode.Storage.Tests/Storages/StreamTests.cs

@@ -0,0 +1,16 @@
+using System.Threading.Tasks;
+using DotNet.Testcontainers.Containers;
+using ManagedCode.Storage.Tests.Common;
+using Xunit;
+
+namespace ManagedCode.Storage.Tests.Storages;
+
+public abstract class StreamTests<T> : BaseContainer<T>
+    where T : IContainer
+{
+    [Fact]
+    public async Task ReadStream_WhenFileExists_ReturnData()
+    {
+        
+    }
+}