Method worker

tests/test_pool.py:1086–1089

()

                    min_size=5, max_size=10)

                async def worker():
                    con = await pool.acquire()
                    self.assertEqual(await con.fetchval('SELECT 1'), 1)
                    await pool.release(con)

                tasks = [worker() for _ in range(n)]
                await asyncio.gather(*tasks)