public void WhenCanExecuteChanged_ThenUpdatesIsEnabledState()
{
var someControl = new TextBox();
var command = new MockCommand();
var parameter = new object();
var commandAction = new InvokeCommandAction();
commandAction.Attach(someControl);
commandAction.Command = command;
commandAction.CommandParameter = parameter;
Assert.IsTrue(someControl.IsEnabled);
command.CanExecuteReturnValue = false;
command.RaiseCanExecuteChanged();
Assert.IsNotNull(command.CanExecuteParameter);
Assert.AreSame(parameter, command.CanExecuteParameter);
Assert.IsFalse(someControl.IsEnabled);
}
