solution files

tests/Cqrs.Tests/CqrsServicesExtensionsTests/AddBehaviour.cs

@@ -0,0 +1,63 @@
+using System.Diagnostics.CodeAnalysis;
+using Microsoft.Extensions.DependencyInjection;
+
+namespace Cqrs.Tests.CqrsServicesExtensionsTests;
+
+public class AddBehaviour
+{
+    public class TestCommand {}
+    public class TestCommandResult {}
+    [ExcludeFromCodeCoverage]
+    public class NonGenericTestOpenBehaviour : IDispatchBehaviour<TestCommand, TestCommandResult>
+    {
+        public ValueTask<TestCommandResult> Handle(TestCommand request, DispatchFurtherDelegate<TestCommandResult> next, CancellationToken cancellationToken)
+        {
+            throw new NotImplementedException();
+        }
+    }
+
+    [Theory]
+    [InlineData(ServiceLifetime.Transient)]
+    [InlineData(ServiceLifetime.Scoped)]
+    [InlineData(ServiceLifetime.Singleton)]
+    public void WhenCalled_ShouldRegisterDispatchBehaviour(ServiceLifetime lifetime)
+    {
+        // Given
+        ServiceCollection services = new();
+
+        // When
+        services.AddCqrs(opt => opt
+            .AddBehaviour<NonGenericTestOpenBehaviour>(lifetime));
+
+        // Then
+        services.ShouldContain(
+            elementPredicate: descriptor => 
+                descriptor.ServiceType == typeof(IDispatchBehaviour<TestCommand, TestCommandResult>)
+                && descriptor.ImplementationType == typeof(NonGenericTestOpenBehaviour)
+                && descriptor.Lifetime == lifetime,
+            expectedCount: 1
+        );
+    }
+
+    [ExcludeFromCodeCoverage]
+    public class InvalidTestBehaviour : IDispatchBehaviour
+    {
+        public Type RequestType => throw new NotImplementedException();
+
+        public Type ResponseType => throw new NotImplementedException();
+    }
+
+    [Fact]
+    public void WhenCalledWithInvalidType_ShouldThrow()
+    {
+        // Given
+        ServiceCollection services = new();
+
+        // When
+
+        // Then
+        Should.Throw<InvalidOperationException>(() => services.AddCqrs(opt => opt
+            .AddBehaviour<InvalidTestBehaviour>())
+        );
+    }
+}