public void LockForWritingWithReadLocks()
{
using (var datasetLock = new DatasetLock())
{
Assert.IsFalse(datasetLock.IsLockedForReading);
Assert.IsFalse(datasetLock.IsLockedForWriting);
var readLockEventRaised = false;
var readUnlockEventRaised = false;
var writeLockEventRaised = false;
datasetLock.OnLockForReading += (s, e) => { readLockEventRaised = true; };
datasetLock.OnUnlockFromReading += (s, e) => { readUnlockEventRaised = true; };
datasetLock.OnLockForWriting += (s, e) => { writeLockEventRaised = true; };
var key1 = datasetLock.LockForReading();
var task = Task <DatasetLockKey> .Factory.StartNew(datasetLock.LockForWriting);
Assert.IsTrue(readLockEventRaised);
Assert.IsFalse(readUnlockEventRaised);
Assert.IsFalse(writeLockEventRaised);
var key2 = datasetLock.LockForReading();
Assert.IsNotNull(key2);
Assert.IsTrue(readLockEventRaised);
Assert.IsFalse(readUnlockEventRaised);
Assert.IsFalse(writeLockEventRaised);
datasetLock.RemoveReadLock(key1);
Assert.IsTrue(readLockEventRaised);
Assert.IsFalse(readUnlockEventRaised);
Assert.IsFalse(writeLockEventRaised);
datasetLock.RemoveReadLock(key2);
var key3 = task.Result;
Assert.IsNotNull(key3);
Assert.IsTrue(readLockEventRaised);
Assert.IsTrue(readUnlockEventRaised);
Assert.IsTrue(writeLockEventRaised);
}
}
public void LockForReadingWithNoLocks()
{
using (var datasetLock = new DatasetLock())
{
Assert.IsFalse(datasetLock.IsLockedForReading);
Assert.IsFalse(datasetLock.IsLockedForWriting);
var eventWasRaised = false;
datasetLock.OnLockForReading += (s, e) => { eventWasRaised = true; };
var key = datasetLock.LockForReading();
Assert.IsNotNull(key);
Assert.IsTrue(eventWasRaised);
Assert.IsTrue(datasetLock.IsLockedForReading);
Assert.IsFalse(datasetLock.IsLockedForWriting);
}
}
public void LockForReadingWithNoLocks()
{
using (var datasetLock = new DatasetLock())
{
Assert.IsFalse(datasetLock.IsLockedForReading);
Assert.IsFalse(datasetLock.IsLockedForWriting);
var eventWasRaised = false;
datasetLock.OnLockForReading += (s, e) => { eventWasRaised = true; };
var key = datasetLock.LockForReading();
Assert.IsNotNull(key);
Assert.IsTrue(eventWasRaised);
Assert.IsTrue(datasetLock.IsLockedForReading);
Assert.IsFalse(datasetLock.IsLockedForWriting);
}
}
public void LockForWritingWithReadLocks()
{
using (var datasetLock = new DatasetLock())
{
Assert.IsFalse(datasetLock.IsLockedForReading);
Assert.IsFalse(datasetLock.IsLockedForWriting);
var readLockEventRaised = false;
var readUnlockEventRaised = false;
var writeLockEventRaised = false;
datasetLock.OnLockForReading += (s, e) => { readLockEventRaised = true; };
datasetLock.OnUnlockFromReading += (s, e) => { readUnlockEventRaised = true; };
datasetLock.OnLockForWriting += (s, e) => { writeLockEventRaised = true; };
var key1 = datasetLock.LockForReading();
var task = Task<DatasetLockKey>.Factory.StartNew(datasetLock.LockForWriting);
Assert.IsTrue(readLockEventRaised);
Assert.IsFalse(readUnlockEventRaised);
Assert.IsFalse(writeLockEventRaised);
var key2 = datasetLock.LockForReading();
Assert.IsNotNull(key2);
Assert.IsTrue(readLockEventRaised);
Assert.IsFalse(readUnlockEventRaised);
Assert.IsFalse(writeLockEventRaised);
datasetLock.RemoveReadLock(key1);
Assert.IsTrue(readLockEventRaised);
Assert.IsFalse(readUnlockEventRaised);
Assert.IsFalse(writeLockEventRaised);
datasetLock.RemoveReadLock(key2);
var key3 = task.Result;
Assert.IsNotNull(key3);
Assert.IsTrue(readLockEventRaised);
Assert.IsTrue(readUnlockEventRaised);
Assert.IsTrue(writeLockEventRaised);
}
}
