What is unit testing in Python and why is it important?

What is unit testing in Python and why is it important?

Unit testing in Python is a method to test individual units of code for correctness. It's important because it helps catch bugs early, ensures code reliability, and simplifies integration.

How do I write a simple unit test in Python?

You can use the unittest module. Here's a simple example:

import unittest

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

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

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

What are some best practices for unit testing?

Some best practices include writing tests for every new feature, keeping tests isolated, using descriptive names, and running tests frequently.

Can you explain test-driven development (TDD)?

Test-driven development (TDD) is a software development approach where you write tests before writing the code that needs to pass those tests. It encourages better design and helps ensure that the code meets its requirements.