Onionr/tests/gossip-unittests/test_peer_exchange.py

import os, uuid
from unittest.mock import Mock
from time import sleep
import secrets


TEST_DIR = 'testdata/%s-%s' % (secrets.token_hex(2), os.path.basename(__file__)) + '/'
print("Test directory:", TEST_DIR)
os.environ["ONIONR_HOME"] = TEST_DIR

from threading import Thread
import asyncio
import unittest
import sys
sys.path.append(".")
sys.path.append("src/")
from unittest.mock import patch

from ordered_set import OrderedSet
from gossip import peerset


import onionrblocks

import blockdb
from gossip.server import gossip_server
from gossip.peer import Peer



from filepaths import gossip_server_socket_file


BLOCK_MAX_SIZE = 1024 * 2000
BLOCK_SIZE_LEN = len(str(BLOCK_MAX_SIZE))
BLOCK_ID_SIZE = 128
BLOCK_STREAM_OFFSET_DIGITS = 8
MAX_PEERS = 10
TRANSPORT_SIZE_BYTES = 64

class MockPeer(Peer):
    def __init__(self):
        self.transport_address = secrets.token_hex(16)
    def __hash__(self):
        return hash(self.transport_address)


class OnionrServerPeerExchange(unittest.TestCase):


    def test_peer_exchange(self):

        Thread(target=gossip_server, daemon=True).start()

        peers = []
        for _ in range(10):
            p = MockPeer()
            peers.append(p)
            peerset.gossip_peer_set.add(p)


        sleep(0.03)
        async def exchange_client():
            reader, writer = await asyncio.open_unix_connection(
                gossip_server_socket_file)
            writer.write(int(3).to_bytes(1, 'big'))
            await writer.drain()
            for i in range(MAX_PEERS):
                peer = await reader.readline()
                for p in peers:
                    if p.transport_address == peer.decode('utf-8').strip():
                        break
                else:
                    raise AssertionError("Peer received not in list " + peer.decode('utf-8'))

        asyncio.run(exchange_client())

unittest.main()