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Tests: the racing cache holds its records in a routed store

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Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
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Meta Vens 2026-10-27 03:51:01 +01:00
commit 2181a7461f
1 changed files with 18 additions and 4 deletions
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22
tests/GameCult.Caching.Tests/CachelessSingleFileTests.cs
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@ -1441,6 +1441,13 @@ namespace GameCult.Caching.Tests
Assert.That(CacheBackingStore.GateTakes, Is.EqualTo(1), "a settled store's call takes only its cache's gate");
}
[CultDocument("tests.gate_filler", "tests.gate_filler.v1")]
[MessagePackObject(AllowPrivate = true)]
internal sealed class GateFiller
{
[Key(0)] [CultName] public string Name = string.Empty;
}
// Under attaches that succeed, a call takes at most three gates, and three is reachable: the guess was null, an attach then
// settled before the call took the store's gate, and the call took the settled cache's gate as its third.
[Test]
@ -1449,6 +1456,7 @@ namespace GameCult.Caching.Tests
var rounds = 0;
var registry = CultDocumentRegistry.ForTypes(new[] { typeof(IdDeck) });
new SingleFileMessagePackBackingStore(_path).WriteDocument(new CultRecordKey("a"), new IdDeck { Name = "a" }, registry: registry);
var withFiller = CultDocumentRegistry.ForTypes(new[] { typeof(IdDeck), typeof(GateFiller) });
var mostTakes = 0;
var deadline = DateTime.UtcNow + TimeSpan.FromSeconds(60);
for (var round = 0; mostTakes < 3 && DateTime.UtcNow < deadline; round++)
@ -1456,10 +1464,15 @@ namespace GameCult.Caching.Tests
rounds++;
var store = new RoleStore(_path);
store.ReleaseAttach.Set();
// A cache holding many records makes the attach's checks before it publishes Cache take long enough to race.
var cache = new CultCache(registry);
for (var index = 0; index < 20000; index++)
cache.AddAsync(new IdDeck { Name = "held" + index }).GetAwaiter().GetResult();
// A cache holding many records in a store of its own makes the attach's checks before it publishes Cache take long
// enough to race.
var cache = new CultCache(withFiller);
cache.AddBackingStore(new SingleFileMessagePackBackingStore(_path + ".filler" + round), typeof(GateFiller));
cache.Commit(batch =>
{
for (var index = 0; index < 20000; index++)
batch.Upsert(new GateFiller { Name = "held" + index }, new CultRecordHandle<GateFiller>(new CultRecordKey("held" + index)));
});
using var barrier = new Barrier(2);
var takes = 0;
var spin = (round % 200) * 400;
@ -1481,6 +1494,7 @@ namespace GameCult.Caching.Tests
Finishes(caller, "a calling thread");
Finishes(attacher, "an attaching thread");
cache.Dispose();
File.Delete(_path + ".filler" + round);
Assert.That(takes, Is.InRange(1, 3), "no call took more than three gates");
mostTakes = Math.Max(mostTakes, takes);
}