What are some examples of unit testing in Python?

What are some examples of unit testing in Python?

Unit testing in Python can be done using the unittest module. For example, you can test a simple function like this:

import unittest

def add(a, b):
    return a + b

class TestAddFunction(unittest.TestCase):
    def test_add(self):
        self.assertEqual(add(1, 2), 3)
        self.assertEqual(add(-1, 1), 0)

if __name__ == '__main__':
    unittest.main()

Can you explain how this test works?

Sure! The test case TestAddFunction inherits from unittest.TestCase. The method test_add checks if the add function returns the expected results for given inputs using assertEqual.

What if I want to test for exceptions?

You can use assertRaises to test for exceptions. For example:

class TestAddFunction(unittest.TestCase):
    def test_add(self):
        self.assertEqual(add(1, 2), 3)

    def test_add_exceptions(self):
        with self.assertRaises(TypeError):
            add('1', 2)