Have you ever written automated tests for individual modules or components in your current project?

Yes, in my current project I wrote automated tests for individual modules using unittest and pytest. For example, for a data processing function, I created tests that checked the correctness of the results with different input parameters, including boundary cases and error handling.

Here's a simple pytest example:

import pytest

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


def test_add():
    assert add(2, 3) == 5
    assert add(-1, 1) == 0
    assert add(0, 0) == 0