public void Deposit_ShouldThrowArgumentException_WhenGivenNegativeAmount()
{
int negativeAmount = -10;
int balance = 20;
var account = new Sut(balance);
Assert.Throws <ArgumentException>(() => account.Deposit(negativeAmount));
}
public void Deposit_ShouldAddToBalance_WithValueEqualToTheGivenAmount()
{
int depositAmount = 10;
int balance = 20;
var account = new Sut(balance);
account.Deposit(depositAmount);
Assert.AreEqual(balance + depositAmount, account.Balance);
}