tests: fix blog host factory to use built in use kestrel call and dump composite host.

src/Blog/wwwroot/posts/chunked-resumable-file-uploads-dotnet/index.md

@@ -3,7 +3,7 @@
   "title": "Building a Chunked, Resumable File Upload System in .NET and Vanilla JS",
   "lead": "How to bypass reverse proxy payload limits, eliminate double-storage disk overhead, and build a resumable file uploader.",
   "isPublished": true,
-   n"publishedAt": "2026-09-03",
+  "publishedAt": "2026-09-03",
   "openGraphImage": "posts/chunked-resumable-file-uploads-dotnet/og-image.png"
 }
 ```

test/Blog.Tests/EndToEnd/BlogHostFactory.cs

@@ -2,62 +2,28 @@ namespace Blog.Tests.EndToEnd;
 
 public class BlogHostFactory<TProgram> : WebApplicationFactory<TProgram> where TProgram : class
 {
-  private IHost? _host;
-
-  private void EnsureServer()
+  public BlogHostFactory()
   {
-    if (_host is null)
-    {
-      using var _ = CreateDefaultClient();
-    }
-  }
-
-  protected override void Dispose(bool disposing)
-  {
-    _host?.Dispose();
+    UseKestrel(server => server.Listen(IPAddress.Loopback, 0));
   }
 
   public string ServerAddress
   {
     get
     {
-      EnsureServer();
+      StartServer();
       return ClientOptions.BaseAddress.ToString();
     }
   }
 
-  protected override IHost CreateHost(IHostBuilder builder)
+  protected override void ConfigureWebHost(IWebHostBuilder builder)
   {
-    var testHost = builder
-      .ConfigureWebHost(webHostBuilder =>
-      {
-        webHostBuilder.ConfigureLogging(config => config.ClearProviders());
-        webHostBuilder.ConfigureTestServices(services =>
-        {
-          var postsDirectory = Path.Combine(Directory.GetCurrentDirectory(), "TestPosts");
-          var postServiceOptions = new FilePostServiceOptions() { PostsDirectory = postsDirectory };
-          services.AddSingleton(Options.Create(postServiceOptions));
-        });
-      })
-      .Build();
-
-    builder.ConfigureWebHost(
-      webHostBuilder => webHostBuilder.UseKestrel(
-        o => o.Listen(IPAddress.Loopback, 0)
-      )
-    );
-
-    _host = builder.Build();
-    _host.Start();
-
-    var server = _host.Services.GetRequiredService<IServer>();
-    var addresses = server.Features.GetRequiredFeature<IServerAddressesFeature>();
-
-    ClientOptions.BaseAddress = addresses.Addresses
-      .Select(x => new Uri(x))
-      .Last();
-
-    testHost.Start();
-    return testHost;
+    builder.ConfigureLogging(config => config.ClearProviders());
+    builder.ConfigureTestServices(services =>
+    {
+      var postsDirectory = Path.Combine(Directory.GetCurrentDirectory(), "TestPosts");
+      var postServiceOptions = new FilePostServiceOptions() { PostsDirectory = postsDirectory };
+      services.AddSingleton(Options.Create(postServiceOptions));
+    });
   }
 }

test/Blog.Tests/EndToEnd/BlogTest.cs

@@ -3,12 +3,12 @@ namespace Blog.Tests.EndToEnd;
 [TestFixture]
 public abstract class BlogTest : PageTest
 {
-  private readonly BlogHostFactory<Program> _factory = new();
+  private static readonly BlogHostFactory<Program> Factory = new();
 
   public override BrowserNewContextOptions ContextOptions()
   {
     var options = base.ContextOptions();
-    options.BaseURL = _factory.ServerAddress;
+    options.BaseURL = Factory.ServerAddress;
     return options;
   }
 
@@ -30,10 +30,10 @@ public abstract class BlogTest : PageTest
     await Context.Tracing.StopAsync(new()
     {
       Path = Path.Combine(
-            TestContext.CurrentContext.WorkDirectory,
-            "playwright-traces",
-            $"{TestContext.CurrentContext.Test.ClassName}.{TestContext.CurrentContext.Test.Name}.zip"
-        )
+        TestContext.CurrentContext.WorkDirectory,
+        "playwright-traces",
+        $"{TestContext.CurrentContext.Test.ClassName}.{TestContext.CurrentContext.Test.Name}.zip"
+      )
     });
   }
 }

test/Blog.Tests/EndToEnd/CompositeHost.cs

@@ -1,28 +0,0 @@
-namespace Blog.Tests.EndToEnd;
-
-public class CompositeHost(IHost testHost, IHost kestrelHost) : IHost
-{
-  private readonly IHost _testHost = testHost;
-  private readonly IHost _kestrelHost = kestrelHost;
-
-  public IServiceProvider Services => _testHost.Services;
-
-  public void Dispose()
-  {
-    _testHost.Dispose();
-    _kestrelHost.Dispose();
-    GC.SuppressFinalize(this);
-  }
-
-  public async Task StartAsync(CancellationToken cancellationToken = default)
-  {
-    await _testHost.StartAsync(cancellationToken);
-    await _kestrelHost.StartAsync(cancellationToken);
-  }
-
-  public async Task StopAsync(CancellationToken cancellationToken = default)
-  {
-    await _testHost.StopAsync(cancellationToken);
-    await _kestrelHost.StopAsync(cancellationToken);
-  }
-}

test/Blog.Tests/Unit/PostMetadataTests.cs

@@ -0,0 +1,95 @@
+using System.Text.Json;
+
+using Markdig;
+using Markdig.Syntax;
+
+namespace Blog.Tests.Unit;
+
+[TestFixture]
+public class PostMetadataTests
+{
+  private static readonly MarkdownPipeline MarkdownPipeline = new MarkdownPipelineBuilder()
+    .UseAdvancedExtensions()
+    .Build();
+
+  private static readonly JsonSerializerOptions JsonSerializerOptions = new()
+  {
+    PropertyNameCaseInsensitive = true,
+    AllowTrailingCommas = true,
+  };
+
+  private const string MetaFence = "meta";
+
+
+  [Test]
+  public void PostsDirectory_ShouldContainIndexFiles()
+  {
+    var postsDir = GetPostsDirectory();
+    var files = Directory.GetFiles(postsDir, "index.md", SearchOption.AllDirectories);
+
+    files.Should().NotBeEmpty("The wwwroot/posts directory should contain blog posts with index.md files.");
+  }
+
+  [TestCaseSource(nameof(GetPostIndexFiles))]
+  public async Task IndexMd_Metadata_CanBeProperlyParsedAndRead(string filePath)
+  {
+    var markdown = await File.ReadAllTextAsync(filePath);
+    var document = Markdown.Parse(markdown, MarkdownPipeline);
+
+    var metadataBlock = document
+      .OfType<FencedCodeBlock>()
+      .FirstOrDefault(block =>
+        block.Arguments is not null &&
+        block.Arguments.Contains(MetaFence)
+      );
+
+    metadataBlock.Should().NotBeNull($"file '{filePath}' should contain a fenced code block with '{MetaFence}' argument.");
+
+    var jsonContent = metadataBlock.Lines.ToString();
+
+    jsonContent.Should().NotBeNullOrWhiteSpace($"metadata code block in '{filePath}' should not be empty.");
+
+    Post? post = null;
+
+    Action deserializeAction = () => post = JsonSerializer.Deserialize<Post>(jsonContent, JsonSerializerOptions);
+
+    deserializeAction.Should().NotThrow($"JSON metadata in '{filePath}' should be valid JSON matching the Post record schema.");
+
+    post.Should().NotBeNull($"deserialized Post from '{filePath}' should not be null.");
+    post.Title.Should().NotBeNullOrWhiteSpace($"post in '{filePath}' must have a title.");
+    post.Lead.Should().NotBeNullOrWhiteSpace($"post in '{filePath}' must have a lead summary.");
+    post.PublishedAt.Should().NotBe(default, $"post in '{filePath}' must have a valid published date.");
+    post.OpenGraphImage.Should().NotBeNullOrWhiteSpace($"post in '{filePath}' must have an openGraphImage path.");
+  }
+
+  private static string GetPostsDirectory()
+  {
+    var current = new DirectoryInfo(AppContext.BaseDirectory);
+
+    while (current is not null)
+    {
+      var candidate = Path.Combine(current.FullName, "src", "Blog", "wwwroot", "posts");
+
+      if (Directory.Exists(candidate))
+      {
+        return candidate;
+      }
+
+      current = current.Parent;
+    }
+
+    throw new DirectoryNotFoundException($"Could not locate 'src/Blog/wwwroot/posts' starting from '{AppContext.BaseDirectory}'.");
+  }
+
+  private static IEnumerable<TestCaseData> GetPostIndexFiles()
+  {
+    var postsDir = GetPostsDirectory();
+    var files = Directory.GetFiles(postsDir, "index.md", SearchOption.AllDirectories);
+
+    foreach (var file in files)
+    {
+      var relativePath = Path.GetRelativePath(postsDir, file);
+      yield return new TestCaseData(file).SetName($"PostMetadata_{relativePath.Replace('\\', '/')}");
+    }
+  }
+}