public override async Task GetStatisticsWithZeroPermitCount()
{
var limiter = new ConcurrencyLimiter(new ConcurrencyLimiterOptions
{
PermitLimit = 100,
QueueProcessingOrder = QueueProcessingOrder.OldestFirst,
QueueLimit = 50
});
var lease = limiter.AttemptAcquire(0);
Assert.True(lease.IsAcquired);
Assert.Equal(1, limiter.GetStatistics().TotalSuccessfulLeases);
Assert.Equal(100, limiter.GetStatistics().CurrentAvailablePermits);
lease = await limiter.AcquireAsync(0);
Assert.True(lease.IsAcquired);
Assert.Equal(2, limiter.GetStatistics().TotalSuccessfulLeases);
Assert.Equal(100, limiter.GetStatistics().CurrentAvailablePermits);
lease = limiter.AttemptAcquire(100);
Assert.True(lease.IsAcquired);
Assert.Equal(3, limiter.GetStatistics().TotalSuccessfulLeases);
Assert.Equal(0, limiter.GetStatistics().CurrentAvailablePermits);
var lease2 = limiter.AttemptAcquire(0);
Assert.False(lease2.IsAcquired);
Assert.Equal(3, limiter.GetStatistics().TotalSuccessfulLeases);
Assert.Equal(1, limiter.GetStatistics().TotalFailedLeases);
Assert.Equal(0, limiter.GetStatistics().CurrentAvailablePermits);
}
public override void GetStatisticsReturnsNewInstances()
{
var limiter = new ConcurrencyLimiter(new ConcurrencyLimiterOptions
{
PermitLimit = 1,
QueueProcessingOrder = QueueProcessingOrder.OldestFirst,
QueueLimit = 1
});
var stats = limiter.GetStatistics();
Assert.Equal(1, stats.CurrentAvailablePermits);
var lease = limiter.AttemptAcquire(1);
var stats2 = limiter.GetStatistics();
Assert.NotSame(stats, stats2);
Assert.Equal(1, stats.CurrentAvailablePermits);
Assert.Equal(0, stats2.CurrentAvailablePermits);
}
public override async Task CanCancelAcquireAsyncBeforeQueuing()
{
var limiter = new ConcurrencyLimiter(new ConcurrencyLimiterOptions
{
PermitLimit = 1,
QueueProcessingOrder = QueueProcessingOrder.OldestFirst,
QueueLimit = 1
});
var lease = limiter.AttemptAcquire(1);
Assert.True(lease.IsAcquired);
var cts = new CancellationTokenSource();
cts.Cancel();
var ex = await Assert.ThrowsAsync <TaskCanceledException>(() => limiter.AcquireAsync(1, cts.Token).AsTask());
Assert.Equal(cts.Token, ex.CancellationToken);
lease.Dispose();
Assert.Equal(1, limiter.GetStatistics()?.CurrentAvailablePermits);
}
public override async Task GetStatisticsHasCorrectValues()
{
var limiter = new ConcurrencyLimiter(new ConcurrencyLimiterOptions
{
PermitLimit = 100,
QueueProcessingOrder = QueueProcessingOrder.OldestFirst,
QueueLimit = 50
});
var stats = limiter.GetStatistics();
Assert.Equal(100, stats.CurrentAvailablePermits);
Assert.Equal(0, stats.CurrentQueuedCount);
Assert.Equal(0, stats.TotalFailedLeases);
Assert.Equal(0, stats.TotalSuccessfulLeases);
// success from acquire + available
var lease1 = limiter.AttemptAcquire(60);
stats = limiter.GetStatistics();
Assert.Equal(40, stats.CurrentAvailablePermits);
Assert.Equal(0, stats.CurrentQueuedCount);
Assert.Equal(0, stats.TotalFailedLeases);
Assert.Equal(1, stats.TotalSuccessfulLeases);
// queue
var lease2Task = limiter.AcquireAsync(50);
stats = limiter.GetStatistics();
Assert.Equal(40, stats.CurrentAvailablePermits);
Assert.Equal(50, stats.CurrentQueuedCount);
Assert.Equal(0, stats.TotalFailedLeases);
Assert.Equal(1, stats.TotalSuccessfulLeases);
// failure from wait
var lease3 = await limiter.AcquireAsync(1);
Assert.False(lease3.IsAcquired);
stats = limiter.GetStatistics();
Assert.Equal(40, stats.CurrentAvailablePermits);
Assert.Equal(50, stats.CurrentQueuedCount);
Assert.Equal(1, stats.TotalFailedLeases);
Assert.Equal(1, stats.TotalSuccessfulLeases);
// failure from acquire
var lease4 = limiter.AttemptAcquire(100);
Assert.False(lease4.IsAcquired);
stats = limiter.GetStatistics();
Assert.Equal(40, stats.CurrentAvailablePermits);
Assert.Equal(50, stats.CurrentQueuedCount);
Assert.Equal(2, stats.TotalFailedLeases);
Assert.Equal(1, stats.TotalSuccessfulLeases);
lease1.Dispose();
await lease2Task;
// success from wait + available + queue
stats = limiter.GetStatistics();
Assert.Equal(50, stats.CurrentAvailablePermits);
Assert.Equal(0, stats.CurrentQueuedCount);
Assert.Equal(2, stats.TotalFailedLeases);
Assert.Equal(2, stats.TotalSuccessfulLeases);
}