public void NotifyCanExecuteChanged_FiresCanExecuteChangedEvent()
{
MockCommandHandler<MockArgumentClass> handler = new MockCommandHandler<MockArgumentClass>();
DelegateCommand<MockArgumentClass> command = new DelegateCommand<MockArgumentClass>(handler.Execute, handler.CanExecute);
int canExecuteChangedCount = 0;
command.CanExecuteChanged += (sender, e) =>
{
canExecuteChangedCount++;
};
command.NotifyCanExecuteChanged();
Assert.AreEqual(1, canExecuteChangedCount);
}