public async Task ShouldWaitAndRelease(SemaphoreSlimLock sut)
{
var mutex = GetSemaphore(sut);
Assert.Equal(1, mutex.CurrentCount);
await sut.WaitAsync(Cts.Token);
Assert.Equal(0, mutex.CurrentCount);
var second = sut.WaitAsync(Cts.Token);
await Wait();
Assert.False(second.IsCompleted);
Assert.Equal(0, mutex.CurrentCount);
await sut.ReleaseAsync(Cts.Token);
await second;
Assert.True(second.IsCompletedSuccessfully);
Assert.Equal(0, mutex.CurrentCount);
await sut.ReleaseAsync(Cts.Token);
Assert.Equal(1, mutex.CurrentCount);
await AssertThrowsAsync <SemaphoreFullException>(
() => sut.ReleaseAsync(Cts.Token));
}
public async Task WaitAsync_ShouldThrowIfDisposed(SemaphoreSlimLock sut)
{
sut.Dispose();
var exception = await AssertThrowsAsync <ObjectDisposedException>(
() => sut.WaitAsync(Cts.Token));
Assert.Equal(typeof(SemaphoreSlimLock).FullName, exception.ObjectName);
}
public async Task ShouldCancelWaiting(SemaphoreSlimLock sut)
{
var mutex = GetSemaphore(sut);
await sut.WaitAsync(Cts.Token);
var second = sut.WaitAsync(Cts.Token);
await Wait();
Assert.False(second.IsCompleted);
Assert.Equal(0, mutex.CurrentCount);
Cts.Cancel();
await AssertThrowsAsync <OperationCanceledException>(
() => second);
Assert.True(second.IsCanceled);
Assert.Equal(0, mutex.CurrentCount);
}