# Copyright (c) 2015 Nicolas JOUANIN
#
# See the file license.txt for copying permission.
import asyncio
import unittest

from amqtt.mqtt.subscribe import SubscribePacket, SubscribePayload
from amqtt.mqtt.packet import PacketIdVariableHeader
from amqtt.mqtt.constants import QOS_1, QOS_2
from amqtt.adapters import BufferReader


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

    def test_from_stream(self):
        data = b"\x80\x0e\x00\x0a\x00\x03a/b\x01\x00\x03c/d\x02"
        stream = BufferReader(data)
        message = self.loop.run_until_complete(SubscribePacket.from_stream(stream))
        (topic, qos) = message.payload.topics[0]
        self.assertEqual(topic, "a/b")
        self.assertEqual(qos, QOS_1)
        (topic, qos) = message.payload.topics[1]
        self.assertEqual(topic, "c/d")
        self.assertEqual(qos, QOS_2)

    def test_to_stream(self):
        variable_header = PacketIdVariableHeader(10)
        payload = SubscribePayload([("a/b", QOS_1), ("c/d", QOS_2)])
        publish = SubscribePacket(variable_header=variable_header, payload=payload)
        out = publish.to_bytes()
        self.assertEqual(out, b"\x82\x0e\x00\x0a\x00\x03a/b\x01\x00\x03c/d\x02")