import unittest
from operator import add

import pytest


class AddTestCase(unittest.TestCase):
    def test_1_2(self):
        a = 1
        b = 2
        desired = 3
        actual = add(a, b)
        assert actual == desired, f'{actual} != {desired}'
    
    def test_2_3(self):
        a = 2 
        b = 3
        desired = 5
        self.assertEqual(add(2, 3), desired)


def test_add_5_2():
    a = 5
    b = 2
    assert 7 == add(a, b)


@pytest.mark.parametrize('a,b,desired', [(1, 2, 3), (3, 3, 5)])
def test_many(a, b, desired):
    assert desired == add(a, b)
    
        
if __name__ == '__main__':
    unittest.main()