Tell me about types of testing and tools/frameworks.

Types of testing:

• Unit Testing — testing individual functions or classes.
• Integration Testing — testing the interaction between modules.
• Functional Testing — testing functionality according to requirements.
• System Testing — testing the entire system as a whole.
• Acceptance Testing — verifying the system's readiness for users.
• Regression Testing — ensuring that changes haven't broken existing functionality.
• Load Testing — testing behavior under load.

Tools and frameworks in Python:

• unittest — built-in module for unit testing.
• pytest — popular framework with a convenient syntax and extensions.
• nose2 — extension of unittest with additional features.
• tox — automation of running tests in different environments.
• mock — for creating stubs and mocks.
• Selenium — for automating browser testing.
• Locust — for load testing.

Example of a simple test with pytest:

import pytest

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


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

Run with: pytest.