class TestLoan(unittest.TestCase):
# one set of loan parameters
bal1 = 1200
rate1 = .12
num1 = 12
pmt1 = 106.61854641401
bal1_6 = 717.350320703218
bal1_11 = 210.080657084758
bal1_16 = -323.064857489090
int1_6 = 7.17350320703218
int1_11 = 2.10080657084758
int1_16 = -3.23064857489090
bal2 = 5000
rate2 = .24
num2 = 15
pmt2 = 389.12736125122
bal2_6 = 3495.369600693820
bal2_11 = 1834.136060908720
bal2_15 = 381.497412991396
int2_6 = 69.90739201387640
int2_11 = 36.68272121817440
int2_15 = 7.62994825982792
def setUp(self):
self.loan1 = Loan(TestLoan.bal1, TestLoan.rate1, TestLoan.num1, 0)
self.loan1.computeMonthlyPayment()
self.loan2 = Loan(TestLoan.bal2, TestLoan.rate2, TestLoan.num2, 0)
self.loan2.computeMonthlyPayment()
def test_1_monthly_payment(self):
self.assertAlmostEqual(self.loan1.monthlyPayment, TestLoan.pmt1)
def test_1_remaining_balance(self):
self.assertAlmostEqual(self.loan1.remainingBalance(11), TestLoan.bal1_11)
self.assertAlmostEqual(self.loan1.remainingBalance(6), TestLoan.bal1_6)
self.assertAlmostEqual(self.loan1.remainingBalance(16), TestLoan.bal1_16)
def test_1_interest_accrued(self):
self.assertAlmostEqual(self.loan1.interestAccrued(6), TestLoan.int1_6)
self.assertAlmostEqual(self.loan1.interestAccrued(16), TestLoan.int1_16)
self.assertAlmostEqual(self.loan1.interestAccrued(11), TestLoan.int1_11)
def test_2_monthly_payment(self):
self.assertAlmostEqual(self.loan1.monthlyPayment, TestLoan.pmt1)
def test_2_remaining_balance(self):
self.assertAlmostEqual(self.loan2.remainingBalance(11), TestLoan.bal2_11)
self.assertAlmostEqual(self.loan2.remainingBalance(6), TestLoan.bal2_6)
self.assertAlmostEqual(self.loan2.remainingBalance(15), TestLoan.bal2_15)
def test_2_interest_accrued(self):
self.assertAlmostEqual(self.loan2.interestAccrued(6), TestLoan.int2_6)
self.assertAlmostEqual(self.loan2.interestAccrued(15), TestLoan.int2_15)
self.assertAlmostEqual(self.loan2.interestAccrued(11), TestLoan.int2_11)
def main(argv):
initialBalance = int(sys.argv[1])
interestRate = int(sys.argv[2])
term = int(sys.argv[3])
myLoan = Loan(initialBalance, interestRate, term, 0)
myLoan.computeMonthlyPayment()
header = '{:<10s} {:<17s} {:<15s} {:<14s} {:<18s}'.format("Month", "Balance In", "Interest", "Payment", "Balance Out")
print(header)
for a in range(1, term + 1):
results = '{:>5} {:>15.2f} {:>15.2f} {:>14.2f} {:18.2f}'.format(
a, myLoan.remainingBalance(a), myLoan.interestAccrued(a), myLoan.monthlyPayment, myLoan.remainingBalance(a+1))
print(results)
