public void Withdraw_AmountMoreThanBalance_Throws()
{
// arrange
var account = new Calc("John Doe", 10.0);
// act
account.Withdraw(11.0);
// assert is handled by the ExpectedException
}
public void Withdraw_ValidAmount_ChangesBalance()
{
// arrange
double currentBalance = 10.0;
double withdrawal = 1.0;
double expected = 9.0;
var account = new Calc("JohnDoe", currentBalance);
// act
account.Withdraw(withdrawal);
double actual = account.Balance;
// assert
Assert.AreEqual(expected, actual);
}