End-to-end tests against the pasture; profiles, follows, search, votes, reactions

tests/e2e (Playwright for .NET 1.61.0 on xunit v3, the Chromium 1228 already
cached, never downloaded, never in CI) runs the published app against
SocialPub's pasture and its town: run.sh publishes it with the Pasture
environment (wwwroot/appsettings.Pasture.json, published only then; the
deploy fails if it ever ships) and serves it as https://decepub.test. The
tests sign in through the real login page and persona chooser, check that
every request goes only to decepub.test and privapub.test with the right
credential on the right API, render one post of each kind from each
platform as its author wrote it, and check every action on the other
side of the wire (town.sh stored): favourites, boosts and replies with
their undoing, follows from a profile, votes, reactions. Each test is also
a cell of the town's report (out/client.jsonl). They found two PrivaPub
bugs fixed there (a blocked author's status answered null; sensitive
remote media invented a content warning) and a reply addressed to nobody.

New in the app, all checked by those tests:
- profiles at /account/{id}: header, bio, fields, counts, the account's
  posts as posts, posts and replies, or media, and follow, unfollow,
  cancel a request, mute and block (AccountService); post authors and
  notifications open them in the app;
- search at /search: accounts, posts and hashtags, a handle or an address
  resolved by PrivaPub;
- poll voting on the card, and emoji reactions shown and given with one
  tap; before a persona's first reaction or vote it is told once that
  both are public (PublicNoticeService, the owner's decision);
- follow requests answered from their notification.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01LsXgEaXee4GCU1hwYgPJXw

tests/e2e/Support/Pasture.cs

@@ -0,0 +1,91 @@
+using System.Diagnostics;
+using System.Text.Json;
+using System.Text.Json.Nodes;
+
+namespace decePubClient.E2E.Support
+{
+	// The pasture and its town as the tests see them: the sites, the accounts the town made (read from the town's own
+	// state), and the town's command line for what each server holds, so a test checks the other side of the wire.
+	public static class Pasture
+	{
+		public const string Site = "https://decepub.test";
+		public const string Api = "https://privapub.test";
+
+		public static readonly string Root = Path.GetFullPath(Path.Combine(RepoRoot(), "..", "SocialPub", "tools", "pasture"));
+
+		static string RepoRoot()
+		{
+			var dir = AppContext.BaseDirectory;
+			while (dir is not null && !File.Exists(Path.Combine(dir, "decePubClient.csproj")))
+				dir = Path.GetDirectoryName(dir);
+			return dir ?? throw new InvalidOperationException("decePubClient.csproj not found above the test output");
+		}
+
+		public sealed record Persona(string UserName, string Name, string Root, string Password, string Token, string LocalId, string ActorUri);
+
+		// every PrivaPub persona the town made, with its root's login
+		public static IReadOnlyList<Persona> Personas()
+		{
+			var sessions = JsonNode.Parse(File.ReadAllText(Path.Combine(Root, ".state", "town", "sessions.json")))!.AsObject();
+			var personas = new List<Persona>();
+			foreach (var (key, value) in sessions)
+			{
+				// st_* are the drivers' selftest accounts, not the town's
+				if (!key.StartsWith("privapub/") || key.StartsWith("privapub/st_") || value?["account"]?["root"]?.GetValue<string>() is not { } root)
+					continue;
+				var account = value["account"]!;
+				personas.Add(new Persona(account["username"]!.GetValue<string>(), account["name"]?.GetValue<string>(), root,
+					account["password"]!.GetValue<string>(),
+					value["token"]!.GetValue<string>(), value["local_id"]!.GetValue<string>(), value["actor_uri"]!.GetValue<string>()));
+			}
+			return personas;
+		}
+
+		// tools/pasture/town.sh <args>, its standard output parsed as JSON
+		public static async Task<JsonNode> Town(params string[] args)
+		{
+			var start = new ProcessStartInfo("python3") { RedirectStandardOutput = true, RedirectStandardError = true };
+			start.ArgumentList.Add(Path.Combine(Root, "town", "town.py"));
+			foreach (var arg in args)
+				start.ArgumentList.Add(arg);
+			using var process = Process.Start(start)!;
+			var output = await process.StandardOutput.ReadToEndAsync();
+			var error = await process.StandardError.ReadToEndAsync();
+			await process.WaitForExitAsync();
+			if (process.ExitCode != 0)
+				throw new InvalidOperationException($"town.sh {string.Join(' ', args)} failed: {error}");
+			return JsonNode.Parse(output.Trim().Split('\n').Last())!;
+		}
+
+		// what a server holds of each object, from its database (town.sh stored)
+		public static async Task<JsonObject> Stored(string platform, params string[] uris) =>
+			(await Town(["stored", platform, .. uris])).AsObject();
+
+		public static async Task<bool> Eventually(Func<Task<bool>> condition, int seconds = 30)
+		{
+			var until = DateTime.UtcNow.AddSeconds(seconds);
+			while (true)
+			{
+				if (await condition())
+					return true;
+				if (DateTime.UtcNow > until)
+					return false;
+				await Task.Delay(1000);
+			}
+		}
+
+		public static readonly JsonSerializerOptions Json = new(JsonSerializerDefaults.Web);
+
+		// an HttpClient that reaches https://<name>.test through Caddy on 127.0.0.1:6443, as the browser does
+		public static HttpClient Http() => new(new SocketsHttpHandler
+		{
+			ConnectCallback = async (context, token) =>
+			{
+				var socket = new System.Net.Sockets.Socket(System.Net.Sockets.SocketType.Stream, System.Net.Sockets.ProtocolType.Tcp);
+				await socket.ConnectAsync("127.0.0.1", 6443, token);
+				return new System.Net.Sockets.NetworkStream(socket, ownsSocket: true);
+			},
+			SslOptions = { RemoteCertificateValidationCallback = (_, _, _, _) => true }
+		});
+	}
+}