public void Add_To_Wallet(decimal initialBalance, decimal additionBalance)
{
SimpleWallet wallet = new SimpleWallet();
wallet.Add(initialBalance);
decimal walletContentsPrevious = wallet.GetBalance();
wallet.Add(additionBalance);
decimal walletContentNext = wallet.GetBalance();
decimal difference = walletContentNext - walletContentsPrevious;
Assert.That(difference.Equals(additionBalance));
}
public void Subtract_From_Filled_Wallet_Result_Is_0()
{
SimpleWallet wallet = new SimpleWallet();
wallet.Add(20);
wallet.Subtract(20);
Assert.That(wallet.GetBalance().Equals(0));
}
public void Subtract_From_Filled_Wallet_Result_Is_Remainder()
{
SimpleWallet wallet = new SimpleWallet();
wallet.Add(20);
wallet.Subtract(10);
Assert.IsTrue(wallet.GetBalance() > 0);
}
public void Subtract_From_Wallet_Result_Is_Correct(decimal initialValue, decimal finalValue, decimal result)
{
SimpleWallet wallet = new SimpleWallet();
wallet.Add(initialValue);
wallet.Subtract(finalValue);
Assert.That(result.Equals(wallet.GetBalance()));
}
public void Negative_Add_To_Wallet()
{
IWallet wallet = new SimpleWallet();
var exception = Assert.Throws <NegativeAdditionException>(() =>
{
wallet.Add(-1);
});
Assert.That(exception.GetType() == typeof(NegativeAdditionException));
}
public void Subtract_From_Balance_Raises_Event()
{
SimpleWallet wallet = new SimpleWallet();
decimal walletBalance = 0;
wallet.Add(10);
IVendingMachineInternal machineInternal = new FakeVendingMachineInternal();
wallet.Init(machineInternal);
((IVendingMachineExternal)machineInternal).WalletValueChanged += balance => { walletBalance = balance; };
wallet.Subtract(5);
Assert.That(walletBalance.Equals(5));
}
public void Add_In_Balance_Raises_Event()
{
//Arrange
IWallet wallet = new SimpleWallet();
//Act
decimal walletBalance = 0;
IVendingMachineInternal machineInternal = new FakeVendingMachineInternal();
wallet.Init(machineInternal);
((IVendingMachineExternal)machineInternal).WalletValueChanged += balance => { walletBalance = balance; };
wallet.Add(10);
//Assert
Assert.That(walletBalance.Equals(10));
}
