Method test_execute_with_arg

tests/test_pool.py:575–580

(pool)

            return 1

        async def test_execute_with_arg(pool):
            i = random.randint(0, 20)
            await asyncio.sleep(random.random() / 100)
            r = await pool.execute('SELECT generate_series(0, $1)', i)
            self.assertEqual(r, 'SELECT {}'.format(i + 1))
            return 1

        async def run(N, meth):
            async with self.create_pool(database='postgres',