lbry-sdk/tests/dht_mocks.py

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2019-01-22 18:49:43 +01:00
import typing
import contextlib
import socket
import mock
import functools
import asyncio
if typing.TYPE_CHECKING:
from lbrynet.dht.protocol.protocol import KademliaProtocol
def get_time_accelerator(loop: asyncio.BaseEventLoop,
now: typing.Optional[float] = None) -> typing.Callable[[float], typing.Awaitable[None]]:
"""
Returns an async advance() function
This provides a way to advance() the BaseEventLoop.time for the scheduled TimerHandles
made by call_later, call_at, and call_soon.
"""
_time = now or loop.time()
loop.time = functools.wraps(loop.time)(lambda: _time)
async def accelerate_time(seconds: float) -> None:
nonlocal _time
if seconds < 0:
raise ValueError('Cannot go back in time ({} seconds)'.format(seconds))
_time += seconds
await past_events()
await asyncio.sleep(0)
async def past_events() -> None:
while loop._scheduled:
timer: asyncio.TimerHandle = loop._scheduled[0]
if timer not in loop._ready and timer._when <= _time:
loop._scheduled.remove(timer)
loop._ready.append(timer)
if timer._when > _time:
break
await asyncio.sleep(0)
async def accelerator(seconds: float):
steps = seconds * 10.0
for _ in range(max(int(steps), 1)):
await accelerate_time(0.1)
return accelerator
@contextlib.contextmanager
def mock_network_loop(loop: asyncio.BaseEventLoop):
dht_network: typing.Dict[typing.Tuple[str, int], 'KademliaProtocol'] = {}
async def create_datagram_endpoint(proto_lam: typing.Callable[[], 'KademliaProtocol'],
from_addr: typing.Tuple[str, int]):
def sendto(data, to_addr):
rx = dht_network.get(to_addr)
if rx and rx.external_ip:
# print(f"{from_addr[0]}:{from_addr[1]} -{len(data)} bytes-> {rx.external_ip}:{rx.udp_port}")
return rx.datagram_received(data, from_addr)
protocol = proto_lam()
transport = asyncio.DatagramTransport(extra={'socket': mock_sock})
transport.close = lambda: mock_sock.close()
mock_sock.sendto = sendto
transport.sendto = mock_sock.sendto
protocol.connection_made(transport)
dht_network[from_addr] = protocol
return transport, protocol
with mock.patch('socket.socket') as mock_socket:
mock_sock = mock.Mock(spec=socket.socket)
mock_sock.setsockopt = lambda *_: None
mock_sock.bind = lambda *_: None
mock_sock.setblocking = lambda *_: None
mock_sock.getsockname = lambda: "0.0.0.0"
mock_sock.getpeername = lambda: ""
mock_sock.close = lambda: None
mock_sock.type = socket.SOCK_DGRAM
mock_sock.fileno = lambda: 7
mock_socket.return_value = mock_sock
loop.create_datagram_endpoint = create_datagram_endpoint
yield