@Test
public void createSavingsAccount() throws BankException {
SavingsAccount account = bank.createSavingsAccount(accountNumberOne, interestRate);
assertNotNull(account);
assertEquals(accountNumberOne, account.accountNumber());
assertEquals(interestRate, account.interestRate());
Account foundAccount = bank.findAccount(accountNumberOne);
assertEquals(true, CompareAccounts.compareAccounts(account, foundAccount));
}