async def test_message_add_get_by_list(self):
queue = DeliveryQueue()
t = ConnectionTarget(recipient_keys=["aaa"])
msg = OutboundMessage("x", target=t)
queue.add_message(msg)
assert queue.has_message_for_key("aaa")
msg_list = [m for m in queue.inspect_all_messages_for_key("aaa")]
assert queue.message_count_for_key("aaa") == 1
assert len(msg_list) == 1
assert msg_list[0] == msg
queue.remove_message_for_key("aaa", msg)
assert queue.has_message_for_key("aaa") is False
async def test_count_zero_with_no_items(self):
queue = DeliveryQueue()
assert queue.message_count_for_key("aaa") == 0