Пакет python3-module-doubles: Информация

Doubles is a Python package that provides test doubles for use in
automated tests.

It provides functionality for stubbing, mocking, and verification of
test doubles against the real objects they double. In contrast to the
Mock package, it provides a clear, expressive syntax and better safety
guarantees to prevent API drift and to improve confidence in tests using
doubles. It comes with drop-in support for test suites run by Pytest,
Nose, or standard unittest.