What are some examples of Test-Driven Development in Python?

What are some examples of Test-Driven Development in Python?

Test-Driven Development (TDD) in Python involves writing tests before the actual code. For example, you can start by writing a test for a simple function that adds two numbers.

Can you show me a simple code example?

Sure! Here's a simple example:

# test_add.py
import unittest

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

class TestAdd(unittest.TestCase):
    def test_add_numbers(self):
        self.assertEqual(add(1, 2), 3)

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

In this example, we first define a test for the add function.

What if the function doesn't pass the test?

If the function doesn't pass the test, you would then implement the add function to ensure it meets the test's requirements. This is the essence of TDD: write the test first, then write the code to pass the test.

Can you explain the benefits of using TDD?

Absolutely! TDD helps ensure code quality, reduces bugs, and improves design. It also makes refactoring easier since you have tests to verify functionality.