public void OncePerThreadFactoryShouldCreateTheSameInstanceFromWithinTheSameThread()
{
IFactory<ISerializable> localFactory = new OncePerThreadFactory<ISerializable>(createInstance);
ISerializable first = localFactory.CreateInstance(null);
ISerializable second = localFactory.CreateInstance(null);
// The two instances should be the same
// since they were created from the same thread
Assert.IsNotNull(first);
Assert.AreSame(first, second);
}
public void OncePerThreadFactoryShouldCreateTheSameInstanceFromWithinTheSameThread()
{
IFactory <ISerializable> localFactory = new OncePerThreadFactory <ISerializable>(createInstance);
ISerializable first = localFactory.CreateInstance(null);
ISerializable second = localFactory.CreateInstance(null);
// The two instances should be the same
// since they were created from the same thread
Assert.IsNotNull(first);
Assert.AreSame(first, second);
}
public void OncePerThreadFactoryShouldCreateUniqueInstancesFromDifferentThreads()
{
IFactory <ISerializable> localFactory = new OncePerThreadFactory <ISerializable>(createInstance);
var resultList = new List <ISerializable>();
Action <IFactory <ISerializable> > doCreate = factory =>
{
ISerializable instance = factory.CreateInstance(null);
ISerializable otherInstance = factory.CreateInstance(null);
// The two instances
// within the same thread must match
Assert.AreSame(instance, otherInstance);
lock (resultList)
{
resultList.Add(instance);
}
};
// Create the instance in another thread
IAsyncResult asyncResult = doCreate.BeginInvoke(localFactory, null, null);
ISerializable localInstance = localFactory.CreateInstance(null);
// Wait for the previous thread
// to finish executing
doCreate.EndInvoke(asyncResult);
Assert.IsTrue(resultList.Count > 0);
// Collect the results from the other thread
ISerializable instanceFromOtherThread = resultList[0];
Assert.IsNotNull(localInstance);
Assert.IsNotNull(instanceFromOtherThread);
Assert.AreNotSame(localInstance, instanceFromOtherThread);
}
public void OncePerThreadFactoryShouldCreateUniqueInstancesFromDifferentThreads()
{
IFactory<ISerializable> localFactory = new OncePerThreadFactory<ISerializable>(createInstance);
var resultList = new List<ISerializable>();
Action<IFactory<ISerializable>> doCreate = factory =>
{
ISerializable instance = factory.CreateInstance(null);
ISerializable otherInstance = factory.CreateInstance(null);
// The two instances
// within the same thread must match
Assert.AreSame(instance, otherInstance);
lock (resultList)
{
resultList.Add(instance);
}
};
// Create the instance in another thread
IAsyncResult asyncResult = doCreate.BeginInvoke(localFactory, null, null);
ISerializable localInstance = localFactory.CreateInstance(null);
// Wait for the previous thread
// to finish executing
doCreate.EndInvoke(asyncResult);
Assert.IsTrue(resultList.Count > 0);
// Collect the results from the other thread
ISerializable instanceFromOtherThread = resultList[0];
Assert.IsNotNull(localInstance);
Assert.IsNotNull(instanceFromOtherThread);
Assert.AreNotSame(localInstance, instanceFromOtherThread);
}
