internal static void Command()
{
Console.WriteLine("Command pattern demo");
Console.WriteLine("------------------------------------");
var modifyPrice = new ModifyPrice();
var product = new Product("IPhone", 25000);
var productCommand = new ProductCommand(product, PriceAction.Increase, 1000);
modifyPrice.SetCommand(productCommand);
modifyPrice.Invoke();
Console.WriteLine(product);
var productCommand2 = new ProductCommand(product, PriceAction.Decrease, 500);
modifyPrice.SetCommand(productCommand2);
modifyPrice.Invoke();
Console.WriteLine(product);
modifyPrice.Undo();
Console.WriteLine(product);
Console.WriteLine("");
Console.WriteLine("------------------------------------");
Console.WriteLine("Command pattern demo 2");
Console.WriteLine("------------------------------------");
var bank = new BankAccount();
var cmd = new BankCommand();
bank.Balance = 90000;
Console.WriteLine($"Balance: {bank.Balance}");
cmd.Amount = 1000;
Console.WriteLine($"Deposit: {cmd.Amount}");
cmd.BalanceAction = _4_Behavioral_Patterns.Command.Demo2.Action.Deposit;
bank.Execute(cmd);
cmd.Amount = 2000;
Console.WriteLine($"Deposit: {cmd.Amount}");
cmd.BalanceAction = _4_Behavioral_Patterns.Command.Demo2.Action.Deposit;
bank.Execute(cmd);
cmd.Amount = 8000;
Console.WriteLine($"Withdraw: {cmd.Amount}");
cmd.BalanceAction = _4_Behavioral_Patterns.Command.Demo2.Action.Withdraw;
bank.Execute(cmd);
cmd.Amount = 100000;
Console.WriteLine($"Withdraw: {cmd.Amount}");
cmd.BalanceAction = _4_Behavioral_Patterns.Command.Demo2.Action.Withdraw;
bank.Execute(cmd);
Console.WriteLine($"Balance: {bank.Balance}");
}
public void Should_Decrease_Price()
{
ModifyPrice modifyPriceInvolker = new ModifyPrice();
var product = new Product("Phone", 500);
modifyPriceInvolker.AddCommand(new ProductCommand(product, PriceAction.Decrease, 100));
modifyPriceInvolker.AddCommand(new ProductCommand(product, PriceAction.Decrease, 200));
modifyPriceInvolker.Invoke();
product.ToString().Should().Be("Current price for the Phone product is 200$.");
}
public static void Execute(Product product, ModifyPrice modifyPrice, ICommand productCommand)
{
modifyPrice.SetCommand(productCommand);
modifyPrice.Invoke();
}