Roll back refacto on Posit.Tests

src/PostIt.Tests/BlogApiTestFakes.cs

@@ -0,0 +1,66 @@
+using Yavsc.Blogspot;
+using PostIt.Services;
+using PostIt.ViewModels;
+using Yavsc.Models;
+
+namespace PostIt.Tests;
+
+/// <summary>Per-call ledger shared between the test and the
+/// recording fake, so the assertion can inspect what the VM
+/// actually sent on the wire without coupling to the fake's
+/// internals.</summary>
+internal sealed class CallRecorder
+{
+    public (HttpMethod method, string path, object? body) FirstCall =>
+        Calls[0];
+    public List<(HttpMethod method, string path, object? body)> Calls { get; } = new();
+}
+
+/// <summary>Test fake that records every CallAsync invocation
+/// and answers them with a canned sequence: the first call gets
+/// a server-issued BlogPostDto (Id=42), the second call gets a
+/// single-element list containing that post. Used by the ViewModel
+/// tests and the headless UI test to capture exactly what the
+/// Save button posts to the server.</summary>
+internal sealed class RecordingYavscApiClient : YavscApiClient
+{
+    private readonly CallRecorder _recorder;
+    public RecordingYavscApiClient(CallRecorder recorder)
+        : base(
+            new Settings
+            {
+                Authentication = new AuthenticationSettings
+                {
+                    Authority = "https://stub.invalid",
+                    ClientId = "stub",
+                    Scopes = new[] { "openid" },
+                },
+            },
+            new TokenStore(System.IO.Path.GetTempFileName()))
+    {
+        _recorder = recorder;
+    }
+
+    public override Task<T> CallAsync<T>(HttpMethod method, string path, object? body = null, CancellationToken ct = default)
+    {
+        _recorder.Calls.Add((method, path, body));
+        // BlogPostDto? boxes to BlogPostDto at runtime, so we test the
+        // non-nullable type — typeof(BlogPostDto?) is a C# error
+        // (CS8639: "typeof cannot be used on a nullable reference
+        // type").
+        if (typeof(T) == typeof(BlogPostDto))
+            return Task.FromResult((T)(object)new BlogPostDto
+            {
+                Id = 42,
+                Title = "Mon premier billet",
+                AuthorId = "tester",
+                Article = "Contenu du billet de test.",
+            });
+        if (typeof(T) == typeof(List<BlogPostDto>))
+            return Task.FromResult((T)(object)new List<BlogPostDto>
+            {
+                new() { Id = 42, Title = "Mon premier billet" }
+            });
+        return Task.FromResult(default(T)!);
+    }
+}