How can I use pytest to test Python generators?

How can I use pytest to test Python generators?

You can use pytest's built-in fixtures and the pytest.mark.parametrize decorator to test generators effectively.

Can you show me a simple example?

Sure! Here's a basic example:

import pytest

def my_generator():
    yield 1
    yield 2
    yield 3

@pytest.mark.parametrize('expected', [1, 2, 3])
def test_my_generator(expected):
    gen = my_generator()
    assert next(gen) == expected

What if my generator has more complex logic?

For complex logic, you can create multiple test cases and use fixtures to set up the necessary context for your tests.

Are there any best practices for testing generators?

Yes, keep your tests isolated, use descriptive names, and ensure you cover edge cases to validate your generator's behavior.