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()
self.assertEqual(out, b'\xa2\x0c\x00\n\x00\x03a/b\x00\x03c/d')
