public void TestPeek()
{
SimplePriorityMessageDispatchChannel channel = new SimplePriorityMessageDispatchChannel();
MessageDispatch dispatch1 = new MessageDispatch();
MessageDispatch dispatch2 = new MessageDispatch();
Message message1 = new Message();
Message message2 = new Message();
message1.Priority = 2;
message2.Priority = 1;
dispatch1.Message = message1;
dispatch2.Message = message2;
Assert.IsTrue( channel.Empty == true );
Assert.IsTrue( channel.Count == 0 );
channel.EnqueueFirst( dispatch1 );
Assert.IsTrue( channel.Empty == false );
Assert.IsTrue( channel.Count == 1 );
channel.EnqueueFirst( dispatch2 );
Assert.IsTrue( channel.Empty == false );
Assert.IsTrue( channel.Count == 2 );
Assert.IsTrue( channel.Peek() == null );
channel.Start();
Assert.IsTrue( channel.Peek() == dispatch1 );
Assert.IsTrue( channel.DequeueNoWait() == dispatch1 );
Assert.IsTrue( channel.Peek() == dispatch2 );
Assert.IsTrue( channel.DequeueNoWait() == dispatch2 );
}