Permissions, RateControl and Auditing

Tests/Unit/AsyncBagTests.cs

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+using Esiur.Core;
+
+namespace Esiur.Tests.Unit;
+
+public class AsyncBagTests
+{
+    [Fact]
+    public void Seal_CollectsConcurrentReplyCompletionsExactlyOnce()
+    {
+        const int count = 2_000;
+        var replies = Enumerable.Range(0, count)
+            .Select(_ => new AsyncReply<int>())
+            .ToArray();
+        var bag = new AsyncBag<int>();
+        foreach (var reply in replies)
+            bag.Add(reply);
+
+        bag.Seal();
+        Parallel.For(0, replies.Length, index => replies[index].Trigger(index));
+
+        Assert.Equal(Enumerable.Range(0, count), bag.Wait(5_000));
+    }
+
+    [Fact]
+    public void AddBag_UsesAStableSnapshot()
+    {
+        var source = new AsyncBag<int>();
+        source.Add(1);
+        source.Add(new AsyncReply<int>(2));
+
+        var destination = new AsyncBag<int>();
+        destination.AddBag(source);
+        destination.Seal();
+
+        Assert.Equal(new[] { 1, 2 }, destination.Wait(1_000));
+    }
+}