Merge pull request #24 from Atypical-Consulting/unit-tests

Create ServiceCollectionExtensionsTests.cs

tests/Atypical.VirtualFileSystem.UnitTests/Services/ServiceCollectionExtensionsTests.cs

@@ -0,0 +1,33 @@
+// Copyright (c) 2022, Atypical Consulting SRL
+// All rights reserved.
+// 
+// This source code is licensed under the BSD-style license found in the
+// LICENSE file in the root directory of this source tree. 
+
+using Atypical.VirtualFileSystem.Core.Contracts;
+using Atypical.VirtualFileSystem.Core.Services;
+using Microsoft.Extensions.DependencyInjection;
+
+namespace VirtualFileSystem.UnitTests.Services;
+
+public class ServiceCollectionExtensionsTests
+{
+    public class MethodAddVirtualFileSystem
+    {
+        [Fact]
+        public void AddVirtualFileSystem_registers_VirtualFileSystem_in_DI()
+        {
+            // Arrange
+            var services = new ServiceCollection();
+
+            // Act
+            services.AddVirtualFileSystem();
+
+            // Assert
+            services.Should()
+                .Contain(service => service.ServiceType == typeof(IVirtualFileSystem)
+                                    && service.ImplementationType == typeof(VFS)
+                                    && service.Lifetime == ServiceLifetime.Scoped);
+        }
+    }
+}