Do you conduct modular testing in your projects?

Yes, I regularly conduct unit testing in my projects. Unit tests allow checking individual functions or classes for correctness, which helps identify errors early in development and facilitates code maintenance. In Python, I often use the unittest or pytest library for this.

Here's a simple example of a unit test using unittest:

import unittest

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

class TestAddFunction(unittest.TestCase):
    def test_add_positive_numbers(self):
        self.assertEqual(add(2, 3), 5)

    def test_add_negative_numbers(self):
        self.assertEqual(add(-1, -1), -2)

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

This approach helps ensure that the function works correctly with different inputs.