class TestCalculator(unittest.TestCase):
calculator = None
@classmethod
def setUpClass(cls):
print('')
print('setUpClass')
@classmethod
def tearDownClass(cls):
print('')
print('tearDownClass')
def setUp(self):
self.calculator = Calculator()
print('')
print('setUp')
# execute after every tests case function run.
def tearDown(self):
# release the Calculator object.
if self.calculator is not None:
self.calculator = None
print('')
print('tearDown')
# below are function that tests Calculator class's plus, minus, multiple and divide functions.
def testInstantiateCalculator(self):
self.assertIsInstance(self.calculator, Calculator)
def testAddition(self):
rows = readCSV("tests/test_cases/Addition.csv")
for row in rows:
result = float(row["Result"])
x = float(row["Value 1"])
y = float(row["Value 2"])
self.assertEqual(self.calculator.add(x, y), result)
def testSubtraction(self):
rows = readCSV("tests/test_cases/Subtraction.csv")
for row in rows:
result = float(row["Result"])
y = float(row["Value 1"])
x = float(row["Value 2"])
self.assertEqual(self.calculator.subtract(x, y), result)
def testDivision(self):
self.assertRaises(ZeroDivisionError, self.calculator.divide, 1, 0)
rows = readCSV("tests/test_cases/Division.csv")
for row in rows:
result = float(row["Result"])
y = float(row["Value 1"])
x = float(row["Value 2"])
self.assertAlmostEqual(self.calculator.divide(x, y), result)
def testMultiplication(self):
rows = readCSV("tests/test_cases/Multiplication.csv")
for row in rows:
result = float(row["Result"])
x = float(row["Value 1"])
y = float(row["Value 2"])
self.assertAlmostEqual(self.calculator.multiply(x, y), result)
def testSquare(self):
rows = readCSV("tests/test_cases/Square.csv")
for row in rows:
result = float(row["Result"])
x = float(row["Value 1"])
self.assertAlmostEqual(self.calculator.square(x), result)
def testSquareRoot(self):
rows = readCSV("tests/test_cases/SquareRoot.csv")
for row in rows:
result = float(row["Result"])
x = float(row["Value 1"])
self.assertAlmostEqual(self.calculator.squareRoot(x), result)
def testResultProperty(self):
self.calculator.results.clear()
self.assertEqual(self.calculator.results, [])
def test_square_method_calculator(self):
calculator = Calculator()
self.assertEqual(calculator.square(2), 4)
self.assertEqual(calculator.result, 4)
