test_peer_strategy.py

# Copyright (c) 2016 Uber Technologies, Inc.
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from __future__ import absolute_import

import sys

import pytest
from tchannel import TChannel
from tchannel.peer_strategy import PreferIncomingCalculator
from tchannel.tornado.connection import TornadoConnection
from tchannel.tornado.connection import INCOMING
from tchannel.tornado.peer import Peer


@pytest.mark.gen_test
def test_get_rank_no_connection():
    server = TChannel('server')
    server.listen()
    peer = Peer(TChannel('test'), '10.10.101.21:230')
    calculator = PreferIncomingCalculator()
    assert sys.maxsize == calculator.get_rank(peer)


@pytest.mark.gen_test
def test_get_rank_with_outgoing():
    server = TChannel('server')
    server.listen()
    connection = yield TornadoConnection.outgoing(server.hostport)

    peer = Peer(TChannel('test'), '10.10.101.21:230')
    calculator = PreferIncomingCalculator()
    peer.register_outgoing_conn(connection)
    assert PreferIncomingCalculator.TIERS[1] == calculator.get_rank(peer)


@pytest.mark.gen_test
def test_get_rank_with_imcoming():
    server = TChannel('server')
    server.listen()
    connection = yield TornadoConnection.outgoing(server.hostport)
    connection.direction = INCOMING
    peer = Peer(TChannel('test'), '10.10.101.21:230')
    calculator = PreferIncomingCalculator()
    peer.register_incoming_conn(connection)
    assert sys.maxsize != calculator.get_rank(peer)