public void _04_Creer_une_classe_abstraite_CommandBase_avec_une_methode_Do_et_Undo_pour_unifier_SumCommand_et_MultiplyCommand()
{
Calculator calculator = new Calculator();
CommandBase sum = new SumCommand(calculator, 5);
Assert.NotNull(sum);
CommandBase multiply = new MultiplyCommand(calculator, 5);
Assert.NotNull(multiply);
}
public void Compute(char operation, int value)
{
CommandBase cmd = null;
switch (operation)
{
case '+':
cmd = new SumCommand(calculator, value);
break;
case '*':
cmd = new MultiplyCommand(calculator, value);
break;
}
if (cmd != null)
{
cmd.Do();
commands.Push(cmd);
}
}
public void _03_Creer_une_classe_MultiplyCommand_avec_une_methode_Do_et_Undo()
{
Calculator calculator = new Calculator();
SumCommand sum = new SumCommand(calculator, 5);
MultiplyCommand multiply = new MultiplyCommand(calculator, 10);
Assert.Equal(0, calculator.Result);
sum.Do();
Assert.Equal(5, calculator.Result);
multiply.Do();
Assert.Equal(50, calculator.Result);
multiply.Undo();
Assert.Equal(5, calculator.Result);
}
