// Mementos are used to roll back states arbitrarily
// A memento is simply a token/handle class with (typically) no functions of its own
// A memento is not required to expose directly the state(s) to which it reverts the system
// Can be used to implement undo/redo
public static void AdvancedDemo()
{
var ba = new BankAccountV2(100);
ba.Deposit(50);
ba.Deposit(25);
WriteLine(ba);
ba.Undo();
WriteLine($"Undo 1: {ba}");
ba.Undo();
WriteLine($"Undo 2: {ba}");
ba.Redo();
WriteLine($"Redo 2: {ba}");
}
public void DepositAndReturnBalance_Input_ReturnsDepositedBalance()
{
//for (var i = 0; i < 100; i++)
//{
//Arrange
StaticKernel.Instance.Bind <IBalanceRepository>().To <TestBalanceRepository>();
var bankAccount = new BankAccountV2(123);
//var bankAccount = new BankAccountV3(123, new TestBalanceRepository());
//Act
var result = bankAccount.DepositAndReturnBalance(12);
//Assert
Assert.AreEqual(12, result);
//}
}
public void DepositAndReturnBalance_Input_WhenDatabaseNotAvailable_ThrowsException()
{
//for (var i = 0; i < 100; i++)
//{
//Arrange
StaticKernel.Instance.Bind <IBalanceRepository>().To <TestFailingBalanceRepository>();
var bankAccount = new BankAccountV2(123);
//var bankAccount = new BankAccountV3(123, new TestFailBalanceRepository());
//Act
TestDelegate testDelegate = () => bankAccount.DepositAndReturnBalance(12);
//Assert
Assert.That(testDelegate, Throws.Exception);
//}
}
