Merge branch 'claude/vault-creation-sharing-62c0b6'

tests/DodoSSH.Client.App.Tests/FakeVaultServer.Teams.cs

@@ -63,6 +63,24 @@ internal sealed partial class FakeVaultServer : ITeamApi, IDirectoryApi, IVaultG
     /// </remarks>
     internal bool CorruptKeyLog { get; set; }
 
+    /// <summary>Slugs this fake refuses, as the real server refuses one already in use.</summary>
+    /// <remarks>
+    /// A vault's slug is derived from its name rather than typed, so a collision is something the client
+    /// has to get out of on its own — and a fake that accepted every slug could not tell whether it does.
+    /// </remarks>
+    internal HashSet<string> TakenSlugs { get; } = new(StringComparer.Ordinal);
+
+    /// <summary>How many vault creates to refuse before answering normally.</summary>
+    /// <remarks>
+    /// Creating a vault of its own is two calls, and the failure worth testing is the one between them:
+    /// the team is made and the vault is not. One refusal is enough to leave the client in that state and
+    /// let the test press CREATE again.
+    /// </remarks>
+    internal int VaultCreateFailures { get; set; }
+
+    /// <summary>How many team creates have been asked for, for a test to assert on.</summary>
+    internal int TeamCreates { get; private set; }
+
     /// <summary>Registers another account, as though they had signed in and enrolled here.</summary>
     /// <returns>Their user id.</returns>
     internal Guid AddAccount(string email, string displayName)
@@ -119,6 +137,24 @@ internal sealed partial class FakeVaultServer : ITeamApi, IDirectoryApi, IVaultG
         CreateTeamRequest request,
         CancellationToken cancellationToken)
     {
+        TeamCreates++;
+
+        // Idempotent on the client-chosen id, as the real one is. That is the whole of how a create whose
+        // second half failed is retried without leaving a second team behind, so a fake that made one
+        // anyway would let the bug through.
+        if (teams.Find(row => row.TeamId == request.TeamId) is { } existing)
+        {
+            return Task.FromResult(existing);
+        }
+
+        if (TakenSlugs.Contains(request.Slug))
+        {
+            throw new DodoSshApiException(
+                System.Net.HttpStatusCode.Conflict,
+                ProblemCodes.TeamSlugTaken,
+                $"The slug '{request.Slug}' is already in use.");
+        }
+
         var team = new TeamSummary(
             request.TeamId,
             request.Name,
@@ -433,6 +469,16 @@ internal sealed partial class FakeVaultServer : ITeamApi, IDirectoryApi, IVaultG
         CreateTeamVaultRequest request,
         CancellationToken cancellationToken)
     {
+        if (VaultCreateFailures > 0)
+        {
+            VaultCreateFailures--;
+
+            throw new DodoSshApiException(
+                System.Net.HttpStatusCode.ServiceUnavailable,
+                code: null,
+                "The server is not answering.");
+        }
+
         var vault = new VaultSummary(
             request.VaultId,
             request.Name,