public void Withdraw_ShouldThrowException_WhenGivenNegativeAmount()
{
int negativeAmount = -10;
var account = new Sut();
Assert.Throws <ArgumentException>(() => account.Withdraw(negativeAmount));
}
public void Withdraw_ShouldThrowInvalidOperationException_WhenGivenAmount_GreaterThanTheBalance()
{
int amountGreaterThatBalance = 20;
int balance = 10;
var sut = new Sut(balance);
Assert.Throws <InvalidOperationException>(() => sut.Withdraw(amountGreaterThatBalance));
}
public void Withdraw_ShouldReduceBalance_WithTheGivenAmount()
{
int withdrawAmount = 10;
int balance = 20;
var account = new Sut(balance);
account.Withdraw(withdrawAmount);
Assert.AreEqual(balance - withdrawAmount, account.Balance);
}
