public void BitMachineIdSet_SetExistenceForEmptyTests()
{
var set1 = MachineIdSet.Empty;
set1 = set1.Add(MachineId.FromIndex(1));
set1[1].Should().BeTrue();
}
public Task FlushingCountsCorrectly()
{
ContentLocationDatabaseConfiguration configuration = new MemoryContentLocationDatabaseConfiguration
{
ContentCacheEnabled = true,
// These ensure no flushing happens unless explicitly directed
CacheFlushingMaximumInterval = Timeout.InfiniteTimeSpan,
CacheMaximumUpdatesPerFlush = 5,
FlushPreservePercentInMemory = 0.5,
};
return(RunCustomTest(configuration, async(context, database) =>
{
// If the counting is done correctly, then writing 5 times to the same entry should trigger a single flush
var shortHash = new ShortHash(ContentHash.Random());
foreach (var i in Enumerable.Range(1, 4))
{
database.LocationAdded(context, shortHash, MachineId.FromIndex(i), 200);
}
database.CacheUpdatesSinceLastFlush.Should().Be(4);
database.LocationAdded(context, shortHash, new MachineId(5), 200);
await database.FlushTask;
database.Counters[ContentLocationDatabaseCounters.TotalNumberOfCacheFlushes].Value.Should().Be(1);
database.CacheUpdatesSinceLastFlush.Should().Be(0);
}));
}
public void MachineIdIndexShouldBePresent()
{
var set1 = MachineIdSet.Empty;
set1 = set1.Add(MachineId.FromIndex(1));
set1.GetMachineIdIndex(MachineId.FromIndex(1)).Should().Be(0);
set1.GetMachineIdIndex(MachineId.FromIndex(2)).Should().Be(-1);
}
public void SetExistenceTests()
{
var set1 = MachineSet(1, 2);
set1[1].Should().BeTrue();
set1[2].Should().BeTrue();
set1 = set1.Remove(MachineId.FromIndex(1));
set1[1].Should().BeFalse();
set1 = set1.Add(MachineId.FromIndex(1));
set1[1].Should().BeTrue();
}
public Task ShutdownDoesNotProcessEnqueuedEvents()
{
// This test is "weird" in the sense that it relies on a "controlled" race condition. We need to check that
// the master does not wait for events to finish processing to complete its shutdown. The way we do this is
// force an arbitrary delay when processing events, and then make sure that we haven't processed any after
// shutdown.
//
// * If we do it with a cancellation token on shutdown started, then we have a race condition, because the
// token will be triggered, and the item could be processed before shutdown finishes.
// * If we do it with a separate lock, we'll need some sort of delay which will be equivalent to what we do
// now.
// * We can't use a cancellation token on shutdown finished, because shutdown awaits for the action blocks
// to complete, and this means we have a deadlock.
//
// By doing things this way, we are relying on the fact that it is unlikely for a thread to not run for a
// second. If we assume that's true, then the slowdown will resume after shutdown has started waiting, and
// we will do the appropriate fast-return path.
var configuration = new SlowedContentLocationEventStoreConfiguration()
{
Slowdown = TimeSpan.FromSeconds(1)
};
var eventHandler = new TestEventHandler();
return(WithContentLocationEventStore(async(tracingContext, clock, fileSystem, eventStore) =>
{
var context = new OperationContext(tracingContext);
var sequencePoint = new EventSequencePoint(clock.UtcNow);
eventStore.StartProcessing(context, sequencePoint).ShouldBeSuccess();
eventStore.AddLocations(context, MachineId.FromIndex(0), new[] { new ContentHashWithSize(ContentHash.Random(), 1) }).ShouldBeSuccess();
(await eventStore.ShutdownAsync(context)).ShouldBeSuccess();
eventHandler.EventsHandled.Should().Be(0);
}, configuration, eventHandler));
}
private MachineIdSet CreateMachineIdSet(int startByteOffset, int length, params int[] setBits)
{
return(new BitMachineIdSet(new byte[length], startByteOffset).Add(setBits.Select(b => MachineId.FromIndex(b)).ToArray()));
}