public override async Task DisposeAsyncReleasesQueuedAcquires()
{
var limiter = new ConcurrencyLimiter(new ConcurrencyLimiterOptions(1, QueueProcessingOrder.OldestFirst, 3));
using var lease = limiter.Acquire(1);
var wait1 = limiter.WaitAsync(1);
var wait2 = limiter.WaitAsync(1);
var wait3 = limiter.WaitAsync(1);
Assert.False(wait1.IsCompleted);
Assert.False(wait2.IsCompleted);
Assert.False(wait3.IsCompleted);
await limiter.DisposeAsync();
var failedLease = await wait1;
Assert.False(failedLease.IsAcquired);
failedLease = await wait2;
Assert.False(failedLease.IsAcquired);
failedLease = await wait3;
Assert.False(failedLease.IsAcquired);
lease.Dispose();
// Throws after disposal
Assert.Throws <ObjectDisposedException>(() => limiter.Acquire(1));
await Assert.ThrowsAsync <ObjectDisposedException>(() => limiter.WaitAsync(1).AsTask());
}
public override void CanAcquireResource()
{
var limiter = new ConcurrencyLimiter(new ConcurrencyLimiterOptions(1, QueueProcessingOrder.NewestFirst, 1));
var lease = limiter.Acquire();
Assert.True(lease.IsAcquired);
Assert.False(limiter.Acquire().IsAcquired);
lease.Dispose();
Assert.True(limiter.Acquire().IsAcquired);
}
public override void AcquireZero_WithoutAvailability()
{
var limiter = new ConcurrencyLimiter(new ConcurrencyLimiterOptions(1, QueueProcessingOrder.NewestFirst, 1));
using var lease = limiter.Acquire(1);
Assert.True(lease.IsAcquired);
var lease2 = limiter.Acquire(0);
Assert.False(lease2.IsAcquired);
lease2.Dispose();
}
public override async Task CanFillQueueWithNewestFirstAfterCancelingQueuedRequestWithAnotherQueuedRequest()
{
var limiter = new ConcurrencyLimiter(new ConcurrencyLimiterOptions(2, QueueProcessingOrder.NewestFirst, 2));
var lease = limiter.Acquire(2);
Assert.True(lease.IsAcquired);
var cts = new CancellationTokenSource();
var wait = limiter.WaitAsync(1, cts.Token);
// Add another item to queue, will be completed as failed later when we queue another item
var wait2 = limiter.WaitAsync(1);
Assert.False(wait.IsCompleted);
cts.Cancel();
var ex = await Assert.ThrowsAsync <TaskCanceledException>(() => wait.AsTask());
Assert.Equal(cts.Token, ex.CancellationToken);
var wait3 = limiter.WaitAsync(2);
Assert.False(wait3.IsCompleted);
// will be kicked by wait3 because we're using NewestFirst
var lease2 = await wait2;
Assert.False(lease2.IsAcquired);
lease.Dispose();
lease = await wait3;
Assert.True(lease.IsAcquired);
}
public override void MetadataNamesContainsAllMetadata()
{
var limiter = new ConcurrencyLimiter(new ConcurrencyLimiterOptions(1, QueueProcessingOrder.OldestFirst, 1));
using var lease = limiter.Acquire(1);
Assert.Collection(lease.MetadataNames, metadataName => Assert.Equal(metadataName, MetadataName.ReasonPhrase.Name));
}
public override async Task DropsMultipleOldestWhenQueuingMoreThanLimit_NewestFirst()
{
var limiter = new ConcurrencyLimiter(new ConcurrencyLimiterOptions(2, QueueProcessingOrder.NewestFirst, 2));
var lease = limiter.Acquire(2);
Assert.True(lease.IsAcquired);
var wait = limiter.WaitAsync(1);
Assert.False(wait.IsCompleted);
var wait2 = limiter.WaitAsync(1);
Assert.False(wait2.IsCompleted);
var wait3 = limiter.WaitAsync(2);
var lease1 = await wait;
var lease2 = await wait2;
Assert.False(lease1.IsAcquired);
Assert.False(lease2.IsAcquired);
Assert.False(wait3.IsCompleted);
lease.Dispose();
lease = await wait3;
Assert.True(lease.IsAcquired);
}
public override void ThrowsWhenAcquiringMoreThanLimit()
{
var limiter = new ConcurrencyLimiter(new ConcurrencyLimiterOptions(1, QueueProcessingOrder.NewestFirst, 1));
var ex = Assert.Throws <ArgumentOutOfRangeException>(() => limiter.Acquire(2));
Assert.Equal("permitCount", ex.ParamName);
}
public override void NullIdleDurationWhenActive()
{
var limiter = new ConcurrencyLimiter(new ConcurrencyLimiterOptions(1, QueueProcessingOrder.OldestFirst, 1));
using var lease = limiter.Acquire(1);
Assert.Null(limiter.IdleDuration);
}
public override async Task LargeAcquiresAndQueuesDoNotIntegerOverflow()
{
var limiter = new ConcurrencyLimiter(new ConcurrencyLimiterOptions(int.MaxValue, QueueProcessingOrder.NewestFirst, int.MaxValue));
var lease = limiter.Acquire(int.MaxValue);
Assert.True(lease.IsAcquired);
// Fill queue
var wait = limiter.WaitAsync(3);
Assert.False(wait.IsCompleted);
var wait2 = limiter.WaitAsync(int.MaxValue);
Assert.False(wait2.IsCompleted);
var lease1 = await wait;
Assert.False(lease1.IsAcquired);
lease.Dispose();
var lease2 = await wait2;
Assert.True(lease2.IsAcquired);
}
public override void NoMetadataOnAcquiredLease()
{
var limiter = new ConcurrencyLimiter(new ConcurrencyLimiterOptions(1, QueueProcessingOrder.OldestFirst, 1));
using var lease = limiter.Acquire(1);
Assert.False(lease.TryGetMetadata(MetadataName.ReasonPhrase.Name, out _));
}
public override void IdleDurationUpdatesWhenChangingFromActive()
{
var limiter = new ConcurrencyLimiter(new ConcurrencyLimiterOptions(1, QueueProcessingOrder.OldestFirst, 1));
var lease = limiter.Acquire(1);
lease.Dispose();
Assert.NotNull(limiter.IdleDuration);
}
public override async Task FailsWhenQueuingMoreThanLimit_OldestFirst()
{
var limiter = new ConcurrencyLimiter(new ConcurrencyLimiterOptions(1, QueueProcessingOrder.OldestFirst, 1));
using var lease = limiter.Acquire(1);
var wait = limiter.WaitAsync(1);
var failedLease = await limiter.WaitAsync(1);
Assert.False(failedLease.IsAcquired);
}
public async Task ReasonMetadataOnFailedWaitAsync()
{
var limiter = new ConcurrencyLimiter(new ConcurrencyLimiterOptions(2, QueueProcessingOrder.OldestFirst, 1));
using var lease = limiter.Acquire(2);
var failedLease = await limiter.WaitAsync(2);
Assert.False(failedLease.IsAcquired);
Assert.True(failedLease.TryGetMetadata(MetadataName.ReasonPhrase.Name, out var metadata));
Assert.Equal("Queue limit reached", metadata);
Assert.True(failedLease.TryGetMetadata(MetadataName.ReasonPhrase, out var typedMetadata));
Assert.Equal("Queue limit reached", typedMetadata);
Assert.Collection(failedLease.MetadataNames, item => item.Equals(MetadataName.ReasonPhrase.Name));
}
public override async Task CanCancelWaitAsyncBeforeQueuing()
{
var limiter = new ConcurrencyLimiter(new ConcurrencyLimiterOptions(1, QueueProcessingOrder.OldestFirst, 1));
var lease = limiter.Acquire(1);
Assert.True(lease.IsAcquired);
var cts = new CancellationTokenSource();
cts.Cancel();
await Assert.ThrowsAsync <OperationCanceledException>(() => limiter.WaitAsync(1, cts.Token).DefaultTimeout());
lease.Dispose();
Assert.Equal(1, limiter.GetAvailablePermits());
}
public override async Task CanDisposeAfterCancelingQueuedRequest()
{
var limiter = new ConcurrencyLimiter(new ConcurrencyLimiterOptions(1, QueueProcessingOrder.OldestFirst, 1));
var lease = limiter.Acquire(1);
Assert.True(lease.IsAcquired);
var cts = new CancellationTokenSource();
var wait = limiter.WaitAsync(1, cts.Token);
cts.Cancel();
var ex = await Assert.ThrowsAsync <TaskCanceledException>(() => wait.AsTask());
Assert.Equal(cts.Token, ex.CancellationToken);
// Make sure dispose doesn't have any side-effects when dealing with a canceled queued item
limiter.Dispose();
}
public override async Task CanCancelWaitAsyncAfterQueuing()
{
var limiter = new ConcurrencyLimiter(new ConcurrencyLimiterOptions(1, QueueProcessingOrder.OldestFirst, 1));
var lease = limiter.Acquire(1);
Assert.True(lease.IsAcquired);
var cts = new CancellationTokenSource();
var wait = limiter.WaitAsync(1, cts.Token);
cts.Cancel();
var ex = await Assert.ThrowsAsync <TaskCanceledException>(() => wait.AsTask());
Assert.Equal(cts.Token, ex.CancellationToken);
lease.Dispose();
Assert.Equal(1, limiter.GetAvailablePermits());
}
public override async Task DropsRequestedLeaseIfPermitCountGreaterThanQueueLimitAndNoAvailability_NewestFirst()
{
var limiter = new ConcurrencyLimiter(new ConcurrencyLimiterOptions(2, QueueProcessingOrder.NewestFirst, 1));
var lease = limiter.Acquire(2);
Assert.True(lease.IsAcquired);
// Fill queue
var wait = limiter.WaitAsync(1);
Assert.False(wait.IsCompleted);
var lease1 = await limiter.WaitAsync(2);
Assert.False(lease1.IsAcquired);
lease.Dispose();
var lease2 = await wait;
Assert.True(lease2.IsAcquired);
}
public override async Task QueueAvailableAfterQueueLimitHitAndResources_BecomeAvailable()
{
var limiter = new ConcurrencyLimiter(new ConcurrencyLimiterOptions(1, QueueProcessingOrder.OldestFirst, 1));
var lease = limiter.Acquire(1);
var wait = limiter.WaitAsync(1);
var failedLease = await limiter.WaitAsync(1);
Assert.False(failedLease.IsAcquired);
lease.Dispose();
lease = await wait;
Assert.True(lease.IsAcquired);
wait = limiter.WaitAsync(1);
Assert.False(wait.IsCompleted);
lease.Dispose();
lease = await wait;
Assert.True(lease.IsAcquired);
}
public override async Task CannotAcquireResourcesWithAcquireWithQueuedItemsIfOldestFirst()
{
var limiter = new ConcurrencyLimiter(new ConcurrencyLimiterOptions(2, QueueProcessingOrder.OldestFirst, 3));
using var lease = await limiter.WaitAsync(1);
Assert.True(lease.IsAcquired);
var wait1 = limiter.WaitAsync(2);
Assert.False(wait1.IsCompleted);
var lease2 = limiter.Acquire(1);
Assert.False(lease2.IsAcquired);
lease.Dispose();
var lease1 = await wait1;
Assert.True(lease1.IsAcquired);
}
public override async Task CancelUpdatesQueueLimit()
{
var limiter = new ConcurrencyLimiter(new ConcurrencyLimiterOptions(1, QueueProcessingOrder.OldestFirst, 1));
var lease = limiter.Acquire(1);
Assert.True(lease.IsAcquired);
var cts = new CancellationTokenSource();
var wait = limiter.WaitAsync(1, cts.Token);
cts.Cancel();
var ex = await Assert.ThrowsAsync <TaskCanceledException>(() => wait.AsTask());
Assert.Equal(cts.Token, ex.CancellationToken);
wait = limiter.WaitAsync(1);
Assert.False(wait.IsCompleted);
lease.Dispose();
lease = await wait;
Assert.True(lease.IsAcquired);
}
public override void ThrowsWhenAcquiringLessThanZero()
{
var limiter = new ConcurrencyLimiter(new ConcurrencyLimiterOptions(1, QueueProcessingOrder.NewestFirst, 1));
Assert.Throws <ArgumentOutOfRangeException>(() => limiter.Acquire(-1));
}