Pytest

Pytest is the dominant testing framework for Python. It is loved for its no-boilerplate syntax (assert x == y), powerful fixture system, and rich plugin ecosystem.

When to Use

• Python Projects: The standard for 99% of new Python projects.
• Complex Setup: Use Fixtures to handle database connections, API clients, or mock data.
• Parametrization: Running the same test with different inputs.

Quick Start

# content of test_sample.py
def inc(x):
    return x + 1