public void ProcessChange_ShouldThrowArgumentException_WhenProvidedInvalidInputString()
{
var cashRegister = new Core.CashRegister();
const string input = "3.27,";
Assert.ThrowsException <ArgumentException>(() => cashRegister.ProcessChange(input));
}
public void ProcessChange_ShouldThrowArgumentException_WhenProvidedHigherAmountOwedThanAmountPaid()
{
var cashRegister = new Core.CashRegister();
const string input = "3.27,1.25";
Assert.ThrowsException <ArgumentException>(() => cashRegister.ProcessChange(input));
}
public void ProcessChange_ShouldReturnLowestAmountOfChange_WhenProvidedCostAndPaidDecimals()
{
var cashRegister = new Core.CashRegister();
const string input = "1.12,3.00";
var result = cashRegister.ProcessChange(input);
Assert.AreEqual("1 dollar,3 quarters,1 dime,3 pennies", result);
}
public void ProcessChange_ShouldReturnRandomResult_WhenProvidedPriceDivisibleByThree()
{
var cashRegister = new Core.CashRegister();
const string input = "3.33,5.00";
var result = cashRegister.ProcessChange(input);
Assert.AreNotEqual("1 dollar,2 quarters,1 dime,1 nickel,2 pennies", result);
}
public void ProcessChange_ShouldThrowArgumentException_WhenProvidedNull()
{
var cashRegister = new Core.CashRegister();
Assert.ThrowsException <ArgumentException>(() => cashRegister.ProcessChange(null));
}
public void ProcessChange_ShouldThrowArgumentException_WhenProvidedEmptyString()
{
var cashRegister = new Core.CashRegister();
Assert.ThrowsException <ArgumentException>(() => cashRegister.ProcessChange(string.Empty));
}
