Add basic integration test

ImageMapper.slnx

@@ -8,5 +8,6 @@
   <Project Path="src/ImageMapper.AppHost/ImageMapper.AppHost.csproj" />
   <Project Path="src/ImageMapper.Models/ImageMapper.Models.csproj" />
   <Project Path="src/ImageMapper.ServiceDefaults/ImageMapper.ServiceDefaults.csproj" />
+  <Project Path="src/ImageMapper.Tests/ImageMapper.Tests.csproj" Id="002fb29d-a214-4a60-b9f8-4de3aa9b8f44" />
   <Project Path="src/ImageMapper.Web/ImageMapper.Web.csproj" />
 </Solution>

src/ImageMapper.Tests/ImageMapper.Tests.csproj

@@ -0,0 +1,35 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net9.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+    <IsPackable>false</IsPackable>
+    <IsTestProject>true</IsTestProject>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Aspire.Hosting.Testing" Version="9.5.2" />
+    <PackageReference Include="coverlet.collector" Version="6.0.4" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.0.0" />
+    <PackageReference Include="NUnit" Version="4.4.0" />
+    <PackageReference Include="NUnit.Analyzers" Version="4.11.2">
+      <PrivateAssets>all</PrivateAssets>
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+    </PackageReference>
+    <PackageReference Include="NUnit3TestAdapter" Version="5.2.0" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\ImageMapper.AppHost\ImageMapper.AppHost.csproj" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <Using Include="System.Net" />
+    <Using Include="Microsoft.Extensions.DependencyInjection" />
+    <Using Include="Aspire.Hosting.ApplicationModel" />
+    <Using Include="Aspire.Hosting.Testing" />
+    <Using Include="NUnit.Framework" />
+  </ItemGroup>
+
+</Project>

src/ImageMapper.Tests/IntegrationTest.cs

@@ -0,0 +1,40 @@
+using Microsoft.Extensions.Logging;
+
+namespace ImageMapper.Tests
+{
+    public class IntegrationTest
+    {
+        private static readonly TimeSpan DefaultTimeout = TimeSpan.FromSeconds(30);
+
+        [Test]
+        public async Task GetWebResourceRootReturnsOkStatusCode()
+        {
+            // Arrange
+            using var cts = new CancellationTokenSource(DefaultTimeout);
+            var cancellationToken = cts.Token;
+            var appHost = await DistributedApplicationTestingBuilder.CreateAsync<Projects.ImageMapper_AppHost>();
+            appHost.Services.AddLogging(logging =>
+            {
+                logging.SetMinimumLevel(LogLevel.Debug);
+                // Override the logging filters from the app's configuration
+                logging.AddFilter(appHost.Environment.ApplicationName, LogLevel.Debug);
+                logging.AddFilter("Aspire.", LogLevel.Debug);
+            });
+            appHost.Services.ConfigureHttpClientDefaults(clientBuilder =>
+            {
+                clientBuilder.AddStandardResilienceHandler();
+            });
+
+            await using var app = await appHost.BuildAsync(cancellationToken).WaitAsync(DefaultTimeout, cancellationToken);
+            await app.StartAsync(cancellationToken).WaitAsync(DefaultTimeout, cancellationToken);
+
+            // Act
+            using var httpClient = app.CreateHttpClient("imagemapper-web");
+            await app.ResourceNotifications.WaitForResourceHealthyAsync("imagemapper-web", cancellationToken).WaitAsync(DefaultTimeout, cancellationToken);
+            using var response = await httpClient.GetAsync("/", cancellationToken);
+
+            // Assert
+            Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.OK));
+        }
+    }
+}