import asyncio
import unittest

from amqtt.adapters import BufferReader
from amqtt.mqtt.packet import PacketIdVariableHeader
from amqtt.mqtt.unsubscribe import UnsubscribePacket, UnubscribePayload


class UnsubscribePacketTest(unittest.TestCase):
    def setUp(self):
        self.loop = asyncio.new_event_loop()

    def test_from_stream(self):
        data = b"\xa2\x0c\x00\n\x00\x03a/b\x00\x03c/d"
        stream = BufferReader(data)
        message = self.loop.run_until_complete(UnsubscribePacket.from_stream(stream))
        assert message.payload.topics[0] == "a/b"
        assert message.payload.topics[1] == "c/d"

    def test_to_stream(self):
        variable_header = PacketIdVariableHeader(10)
        payload = UnubscribePayload(["a/b", "c/d"])
        publish = UnsubscribePacket(variable_header=variable_header, payload=payload)
        out = publish.to_bytes()
        assert out == b"\xa2\x0c\x00\n\x00\x03a/b\x00\x03c/d"