public async Task DisposeAsync_ExecuteTwice_UnlockOnce()
{
// arrange
var memoryLock = new Mock <IInMemoryKeyLock>();
var acquired = new InMemoryAcquiredLock(TestLockKey, memoryLock.Object, DefaultExpiry);
// act
await acquired.DisposeAsync();
await acquired.DisposeAsync();
// assert
memoryLock.Verify(x => x.Unlock(TestLockKey), Times.Once);
}
public async Task DisposeAsync_ThreadSafety()
{
// arrange
var readerWriterLock = new AsyncReaderWriterLock();
var writerLockHandle = readerWriterLock.WriterLock();
var finished = false;
var memoryLock = new Mock <IInMemoryKeyLock>();
var acquired = new InMemoryAcquiredLock(TestLockKey, memoryLock.Object, DefaultExpiry);
async Task TestLock()
{
while (!finished)
{
using (await readerWriterLock.ReaderLockAsync())
{
await acquired.DisposeAsync();
}
}
}
var tasks = Enumerable.Range(0, 3).Select(_ => Task.Run(TestLock)).ToList();
for (var i = 0; i < 50; i++)
{
writerLockHandle.Dispose();
await Task.Delay(1);
writerLockHandle = readerWriterLock.WriterLock();
memoryLock.Verify(x => x.Unlock(TestLockKey), Times.AtMostOnce);
memoryLock = new Mock <IInMemoryKeyLock>();
acquired = new InMemoryAcquiredLock(TestLockKey, memoryLock.Object, DefaultExpiry);
}
// assert
finished = true;
writerLockHandle.Dispose();
}