py-testing-async

Apply pytest-asyncio patterns to test asynchronous Python code.

Updated Dec 22, 2025

Search Tags:#pytest #async testing #httpx #pytest-asyncio #async-fixtures #database-isolation #mocking-async

Ready to run

npx skills add https://github.com/CJHarmath/claude-agents-skills --skill py-testing-async

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: py-testing-async
Source: https://github.com/CJHarmath/claude-agents-skills/tree/main/skills/py-testing-async
Command: npx skills add https://github.com/CJHarmath/claude-agents-skills --skill py-testing-async

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Async testing requires patterns to reliably test asynchronous code, mocking, and database interactions; this skill provides best practices to write robust tests using pytest-asyncio.

Core Features & Use Cases

Async fixtures and configuration for asyncio-based tests.
Database/test isolation strategies for consistent results.
Mocking async functions and patching async services.
Testing HTTP clients (e.g., AsyncClient) and multi-step flows.
End-to-end test patterns for service layers.

Quick Start

Create a simple async test file that awaits an async function and passes with pytest, then run pytest to verify it.

Frequently Asked Questions about py-testing-async

High-intent search queries and answers about installing and using this skill.

FAQPage Schema

How do I test async Python functions with pytest?▼

Database isolation in async tests keeps test runs consistent by applying strategies that separate database interactions. Using pytest-asyncio fixtures, you can manage transactional boundaries and roll back changes to prevent data leakage between tests.

Can I use httpx AsyncClient with pytest-asyncio?▼

Yes, you can use httpx AsyncClient with pytest-asyncio to test HTTP clients and multi-step service flows. The skill provides patterns for configuring async fixtures that yield an AsyncClient for making awaited HTTP requests in integration tests.

What is the best way to mock async functions in pytest?▼

Mocking async functions in pytest involves patching asynchronous services to return predetermined values or coroutines. The skill provides best practices for mocking async functions, ensuring your unit tests remain isolated and deterministic without hitting live external dependencies.

Do I need SQLAlchemy or SQLModel for async database testing with pytest?▼

SQLAlchemy or SQLModel are optional dependencies required only if you are specifically testing asynchronous database interactions. The core async testing patterns, HTTP client testing, and mocking features work independently without requiring an async ORM framework.

Why does my pytest-asyncio fixture cause a ScopeError or event loop error?▼

Async fixture event loop errors occur when fixtures operate on incompatible event loops or lack proper async markers. Configuring pytest-asyncio correctly and defining fixtures with appropriate async scope ensures the test suite shares the event loop reliably.