Add failing test for #297

src/ServiceComposer.AspNetCore.Endpoints.Tests/When_validating_container_configuration.cs

@@ -0,0 +1,71 @@
+using System.Threading.Tasks;
+using Microsoft.AspNetCore.Builder;
+using Microsoft.AspNetCore.Http;
+using Microsoft.AspNetCore.Mvc;
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.Hosting;
+using Newtonsoft.Json.Linq;
+using ServiceComposer.AspNetCore.Testing;
+using Xunit;
+
+namespace ServiceComposer.AspNetCore.Endpoints.Tests
+{
+    public class When_validating_container_configuration
+    {
+        class EmptyResponseHandler : ICompositionRequestsHandler
+        {
+            [HttpGet("/empty-response/{id}")]
+            public Task Handle(HttpRequest request)
+            {
+                var vm = request.GetComposedResponseModel();
+                var ctx = request.GetCompositionContext();
+                vm.RequestId = ctx.RequestId;
+
+                return Task.CompletedTask;
+            }
+        }
+
+        [Fact]
+        public async Task Startup_should_not_fail()
+        {
+            // Arrange
+            var client = new SelfContainedWebApplicationFactoryWithHost<Dummy>
+            (
+                configureServices: services =>
+                {
+                    services.AddViewModelComposition(options =>
+                    {
+                        options.AssemblyScanner.Disable();
+                        options.RegisterCompositionHandler<EmptyResponseHandler>();
+                    });
+                    services.AddRouting();
+                },
+                configure: app =>
+                {
+                    app.UseRouting();
+                    app.UseEndpoints(builder => builder.MapCompositionHandlers());
+                }
+            )
+            {
+                HostBuilderCustomization = builder =>
+                {
+                    builder.UseDefaultServiceProvider(options =>
+                    {
+                        options.ValidateScopes = true;
+                        options.ValidateOnBuild = true;
+                    });
+                }
+            }.CreateClient();
+
+            // Act
+            var response = await client.GetAsync("/empty-response/1");
+
+            // Assert
+            Assert.True(response.IsSuccessStatusCode);
+
+            var contentString = await response.Content.ReadAsStringAsync();
+            dynamic body = JObject.Parse(contentString);
+            Assert.NotNull(body.requestId);
+        }
+    }
+}