What are the differences between pytest-mock and unittest.mock?

What are the differences between pytest-mock and unittest.mock?

pytest-mock is a plugin for pytest that provides a simple way to mock objects, while unittest.mock is part of the standard library for creating mock objects in unit tests. They both serve similar purposes but have different usage patterns.

Can you give me an example of how to use pytest-mock?

Sure! With pytest-mock, you can use the mocker fixture to easily mock functions. For example:

def test_function(mocker):
    mock = mocker.patch('module.function')
    mock.return_value = 'mocked!'
    assert module.function() == 'mocked!'

How about an example using unittest.mock?

Certainly! Here's how you can use unittest.mock:

from unittest.mock import patch

def test_function():
    with patch('module.function') as mock:
        mock.return_value = 'mocked!'
        assert module.function() == 'mocked!'

Which one should I use for my project?

It depends on your testing framework. If you're using pytest, pytest-mock is more convenient. If you're using unittest, then unittest.mock is the way to go.