public void UseWriteLock_UpgradeFromReadToWrite_Success()
{
using var slimLock = new ReaderWriterLockSlim();
using var upgradeableLock = new AcquireUpgradeableReaderLock(slimLock);
Assert.True(slimLock.IsUpgradeableReadLockHeld);
Assert.False(slimLock.IsWriteLockHeld);
using (upgradeableLock.UseWriteLock())
{
Assert.True(slimLock.IsWriteLockHeld);
}
}
public async Task Ctor_EnterUpgradeableWhenLockIsAlreadyInReadAndUpgrade_ThrowsException()
{
var executed = false;
var slimLock = new ReaderWriterLockSlim();
slimLock.EnterReadLock();
await Task.Run(() =>
{
using (var upgradeableLock = new AcquireUpgradeableReaderLock(slimLock))
{
Assert.Throws <AcquireLockFailedException>(() =>
{
executed = true;
var _ = upgradeableLock.UseWriteLock(1);
});
}
});
Assert.True(executed);
}
