public void CanUndoWhenACommandHasBeenExecuted()
{
var commandStack = new CommandStack();
var mockCommand = new Mock<ICommand>();
commandStack.Execute(mockCommand.Object);
Assert.IsTrue(commandStack.CanUndo());
}
public void CanNotUndoWhenNoCommandsHaveBeenExecuted()
{
var commandStack = new CommandStack();
Assert.IsFalse(commandStack.CanUndo());
}