public void testAddFundsActuallyAddsCorrectFundsToBalanceValue() throws Exception {
UserBalanceInterface userBalance = new UserBalance();
userBalance.addFunds(InsertedCoinPiece.QUARTER);
double expectedBalanceValueAsFractionOfADollar = .25;
assertEquals(
"Make certain that the conversion to fraction of a dollar is .01!",
expectedBalanceValueAsFractionOfADollar,
userBalance.getBalanceValue());
}
public void testSubtractFundsActuallyRemovesCorrectFundsToBalanceValue() throws Exception {
UserBalanceInterface userBalance = new UserBalance();
userBalance.addFunds(InsertedCoinPiece.QUARTER);
userBalance.addFunds(InsertedCoinPiece.QUARTER);
userBalance.addFunds(InsertedCoinPiece.DIME);
double expectedUserBalanceAsFractionOfDollar = .60;
assertEquals(expectedUserBalanceAsFractionOfDollar, userBalance.getBalanceValue());
userBalance.subtractFunds(".50");
double expectedUserBalanceAsFractionOfDollarAfterSubtractingFunds = .10;
assertEquals(
expectedUserBalanceAsFractionOfDollarAfterSubtractingFunds, userBalance.getBalanceValue());
}
public void testWhenNewUserBalanceIsConstructedBalanceValueIsInitiallyZero() throws Exception {
UserBalanceInterface balance = new UserBalance();
assertEquals(0d, balance.getBalanceValue());
}