new_contents: import aio_pika
  import aio_pika.abc
  
  
  async def test_connect_robust(amqp_url) -> None:
      async with await aio_pika.connect_robust(amqp_url) as connection:
          assert isinstance(connection, aio_pika.abc.AbstractRobustConnection)
          assert isinstance(connection, aio_pika.abc.AbstractConnection)
  
          channel = await connection.channel()
          assert isinstance(channel, aio_pika.abc.AbstractRobustChannel)
          assert isinstance(channel, aio_pika.abc.AbstractChannel)
  
  
  async def test_connect(amqp_url) -> None:
      async with await aio_pika.connect(amqp_url) as connection:
          assert isinstance(connection, aio_pika.abc.AbstractConnection)
          assert not isinstance(
              connection, aio_pika.abc.AbstractRobustConnection
          )
  
          channel = await connection.channel()
          assert isinstance(channel, aio_pika.abc.AbstractChannel)
          assert not isinstance(
              channel, aio_pika.abc.AbstractRobustChannel
          )
  
subject: add typing tests