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How to Test HTTPX Async Client Pool Reuse with Mocks in Python

Mock an httpx.AsyncClient to verify connection pool reuse by asserting GET calls share a single client instance across concurrent async requests.

httpx async-await mock

Python

import asyncio
import httpx
from unittest.mock import AsyncMock, patch, Mock

async def fetch_with_pool(client, url, n_reuses=3):
    results = []
    for i in range(n_reuses):
        resp = await client.get(url)
        results.append(resp.status_code)
        await asyncio.sleep(0)  # yield to loop to mimic real us…

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