httpx test client

test.py

import asyncio

from httpx import AsyncClient


class CustomClient(AsyncClient):

  async def make_query(self, url: str) -> int:
    async with self as client:
      await client.get(url)


async def run():
  test_client: CustomClient = CustomClient()
  try:
    await test_client.make_query('https://github.com')
    await test_client.make_query('https://github.com')
  except RuntimeError:
    print('Cannot open the same self-client 2 times')


asyncio.run(run())
# Cannot open the same self-client 2 times