Add regression test for #22

		assert contents1 == b"This is a message sent in multiple chunks. Bye", contents1

		assert contents2 == b"This is a message sent ", contents2

	async def test_multiple_same(self) -> None:

		"""

		Check that an exception is raised when a filter is added multiple times

		"""

		async def test_filter(session: Session) -> Accept:

			return Accept()

		with self.assertWarns(UserWarning):

			Runner(test_filter, test_filter)

	async def test_abort(self) -> None:

		"""

		Check that a runner closes cleanly when it receives an Abort