class CalculatorTest(unittest.TestCase):
def setUp(self):
self.calc = Calculator()
def tearDown(self):
del self.calc
def test_addition(self):
self.calc.history = list()
self.calc.buffer_front_back(5, 1, 0)
self.calc.add_operation(Add(12))
self.calc.equals()
self.calc.places_front = 2
self.calc.places_back = 0
self.assertEqual(self.calc.current_buffer, 17)
def test_division(self):
self.calc.history = list()
self.calc.buffer_front_back(40, 1, 0)
self.calc.add_operation(Divide(2400))
self.calc.equals()
self.calc.places_front = 1
self.calc.places_back = 0
self.assertEqual(self.calc.current_buffer, 60)
def test_multiplication(self):
self.calc.history = list()
self.calc.buffer_front_back(30, 1, 0)
self.calc.add_operation(Multiply(40))
self.calc.equals()
self.calc.places_front = 3
self.calc.places_back = 0
self.assertEqual(self.calc.current_buffer, 1200)
def test_bad_input(self):
with self.assertRaises(CalculatorInputError):
newcalc = Calculator()
newcalc.buffer_front_back("hey", 5, 2)
def test_buffer_front_back(self):
with self.assertRaises(CalculatorInputError):
newcalc = Calculator()
newcalc.buffer_front_back(5.5, 2.2, 6)
def test_bad_constructor(self):
with self.assertRaises(CalculatorInputError):
newcalc = Calculator("bad", 5, 2)
def test_divide_by_zero(self):
with self.assertRaises(CalculatorDivideError):
newcalc = Calculator(0, 1, 0)
newcalc.add_operation(Divide(6))
newcalc.equals()
def test_divide_by_zero(self):
with self.assertRaises(CalculatorDivideError):
newcalc = Calculator(0, 1, 0)
newcalc.add_operation(Divide(6))
newcalc.equals()