public async Task WaitForWriteAsync_TheSecondReaderWouldBlocked()
{
var locker = new AsyncReaderWriterLock();
using (await locker.WaitForWriteAsync())
{
Assert.IsFalse(locker.TryEnterRead(out _));
using var tokenSrc = new CancellationTokenSource(1000);
Assert.CatchAsync <OperationCanceledException>(() => locker.WaitForReadAsync(tokenSrc.Token));
}
}
public async Task Reader_Writer_Reader_LastReaderBlock()
{
var locker = new AsyncReaderWriterLock();
var reader1 = await locker.WaitForReadAsync();
var writer = locker.WaitForWriteAsync();
await Task.Delay(100);
Assert.IsFalse(locker.TryEnterRead(out _));
using var tokenSrc = new CancellationTokenSource(1000);
Assert.CatchAsync <OperationCanceledException>(() => locker.WaitForReadAsync(tokenSrc.Token));
}
public async Task AfterWriterExit_AllReadersWereActivated()
{
var locker = new AsyncReaderWriterLock();
var writer = await locker.WaitForWriteAsync();
var readers = Task.WhenAll(
locker.WaitForReadAsync(),
locker.WaitForReadAsync());
await Task.Delay(1000);
Assert.IsFalse(readers.IsCompleted);
writer.Dispose();
Assert.IsTrue(locker.TryEnterRead(out _));
await readers;
}
