public void CanExecuteReturnsTrueWithoutCanExecuteDelegate()
{
var handlers = new DelegateHandlers();
var command = new RelayCommand(handlers.Execute);
var condition = command.CanExecute();
Assert.True(condition);
}
public void RaiseCanExecuteWithExceptionChangedNoRaiseCanExecuteChanged()
{
var handlers = new DelegateHandlers();
var command = new RelayCommand(handlers.Execute, () => true);
var canExecuteChangedRaised = false;
command.CanExecuteChanged += delegate { canExecuteChangedRaised = true; };
Assert.False(canExecuteChangedRaised);
}
public void CanExecuteCallsPassedInCanExecuteDelegate()
{
var handlers = new DelegateHandlers();
var command = new RelayCommand(handlers.Execute, handlers.CanExecute);
handlers.CanExecuteReturnValue = true;
var actual = command.CanExecute();
Assert.AreEqual(handlers.CanExecuteReturnValue, actual);
}
public void RaiseCanExecuteChangedRaisesCanExecuteChanged()
{
var canExecuteChangedRaised = false;
var handlers = new DelegateHandlers();
var command = new RelayCommand(handlers.Execute, () => false);
command.CanExecuteChanged += delegate { canExecuteChangedRaised = true; };
CommandManager.InvalidateRequerySuggested();
Dispatcher.CurrentDispatcher.Invoke(DispatcherPriority.Background, new Action(() => { }));
Assert.True(canExecuteChangedRaised);
}
