CODE EXAMPLE FOR PYTHON

python unittest

### file name should start with => test_ <= or end with => _test <= ###
import unittest

class TestCalculator(unittest.TestCase):
  
  @classmethod
  def setUpClass(cls): ### run once before all test cases ###
    pass
  
  @classmethod
  def tearDownClass(cls): ### run once after all test cases ###
    pass
  
  def setUp(self): ### run before each test case ###
    pass
  
  def tearDown(self): ### run after each test case ###
    pass
  
  ### make sure to add => test_ <= as prefix to all test cases otherwise they won't work ###
  def test_add(self):
        '''Test case function for addition'''
        self.calc = Calculator()
        result = self.calc.add(4, 7)
        expected = 11
        self.assertEqual(result, expected)

    def test_sub(self):
        '''Test case function for subtraction'''
        self.calc = Calculator()
        result = self.calc.sub(10, 5)
        expected = 5
        self.assertEqual(result, expected)

    @unittest.skip('Some reason')
    def test_mul(self):
        '''Test case function for multiplication'''
        self.calc = Calculator()
        result = self.calc.mul(3, 7)
        expected = 21
        self.assertEqual(result, expected)

    def test_div(self):
        '''Test case function for division'''
        self.calc = Calculator()
        result = self.calc.div(10, 2)
        expected = 4
        self.assertEqual(result, expected)