Mocking Python Packages

vcrpy

Automatically mock your HTTP interactions to simplify and speed up testing

aioresponses

Aioresponses is a helper for mock/fake web requests in python aiohttp package.

mongomock

Small library for mocking pymongo collection objects for testing purposes

pyfakefs

Provides a fake file system that mocks the Python file system modules.

httpretty

Intercept HTTP requests at the Python socket level. Fakes the whole socket module

pook

HTTP traffic mocking and testing made easy in Python

mocket

a socket mock framework - for all kinds of socket animals, web-clients included

django-mock-queries

A library for mocking django queryset functions in memory for testing

callee

Argument matchers for unittest.mock

mock-alchemy

SQLAlchemy mock helpers.

flexmock

Mock/stub/spy library for Python

openmock

Python Opensearch Mock for test purposes (fork of elasticmock)

pytest-mongodb

pytest plugin for mocking MongoDB with fixtures

pychoir

A Simple Unit Test Matcher Library for Python 3.6+

montydb

Monty, Mongo tinified. MongoDB implemented in Python !

pymox

Pymox - Python mocking on steroids

pytest-when

Pytest plugin for more readable mocking

nala

🦁 Nala - A delightful test framework for C projects.

mocksafe

Type-safe mocking for Python.

mocksmith

Type-safe data validation and mocking for Python dataclasses and Pydantic models

chainmock

Mocking library for Python

mimicker

Your lightweight, Python-native HTTP mocking server

cmd-mox

Python-native command mocking

evalcraft

Generate deterministic pytest tests for your AI agents from one real run, then replay them in CI for $0. Fast, flake-free agent testing.