47 lines
1.5 KiB
C#
47 lines
1.5 KiB
C#
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using w4c_workflows.Services;
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using w4c_workflows.Services.Messaging;
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using Xunit;
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namespace w4c_workflows.Tests;
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/// <summary>
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/// Backlog-bound regression tests: a stalled in-memory consumer must not be able
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/// to grow server memory without limit. Both channels are bounded and drop the
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/// oldest entry under pressure.
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/// </summary>
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public class BoundedChannelTests
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{
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[Fact]
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public void RealtimeEventHub_bounds_the_per_client_backlog()
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{
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var hub = new RealtimeEventHub();
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var (id, reader) = hub.AddClient("tenant-a");
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for (var i = 0; i < 300; i++)
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hub.Publish("tenant-a", "workflow", i.ToString(), DateTime.UtcNow);
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var received = 0;
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while (reader.TryRead(out _))
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received++;
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// Client channel capacity is 256 and DropOldest keeps the newest entries.
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Assert.Equal(256, received);
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hub.RemoveClient("tenant-a", id);
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}
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[Fact]
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public async Task InMemoryTransport_bounds_the_job_backlog()
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{
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var transport = new InMemoryTransport();
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for (var i = 0; i < 10_500; i++)
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await transport.EnqueueAsync("tenant-b", new Dictionary<string, string> { ["n"] = i.ToString() }, default);
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var drained = await transport.ReadGroupAsync("tenant-b", "consumer", 20_000, default);
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Assert.True(drained.Count > 0, "no messages were readable");
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Assert.True(drained.Count <= 10_000, $"job backlog was not bounded: {drained.Count}");
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}
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}
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