What tools or frameworks are used for writing automated tests in your project?

For writing automated tests in Python, the following tools and frameworks are commonly used:

• unittest — a built-in module for unit testing, supports creating test classes and methods.
• pytest — a popular external framework with a user-friendly syntax, extensibility, and a powerful fixture system.
• mock (built into unittest.mock) — for creating mocks and stubs.
• tox — for automating tests across different environments.
• coverage — for measuring code coverage.

Example of a simple test using pytest:

# test_example.py

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

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

Run:

pytest test_example.py

The choice of a specific tool depends on project requirements and team preferences.