75 lines
2.2 KiB
Python
75 lines
2.2 KiB
Python
from unittest import TestCase, main
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from multiprocessing import Process, Queue
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from mypy.ipc import IPCClient, IPCServer
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import pytest
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import sys
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import time
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CONNECTION_NAME = 'dmypy-test-ipc'
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def server(msg: str, q: 'Queue[str]') -> None:
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server = IPCServer(CONNECTION_NAME)
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q.put(server.connection_name)
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data = b''
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while not data:
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with server:
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server.write(msg.encode())
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data = server.read()
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server.cleanup()
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class IPCTests(TestCase):
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def test_transaction_large(self) -> None:
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queue: Queue[str] = Queue()
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msg = 't' * 200000 # longer than the max read size of 100_000
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p = Process(target=server, args=(msg, queue), daemon=True)
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p.start()
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connection_name = queue.get()
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with IPCClient(connection_name, timeout=1) as client:
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assert client.read() == msg.encode()
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client.write(b'test')
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queue.close()
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queue.join_thread()
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p.join()
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def test_connect_twice(self) -> None:
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queue: Queue[str] = Queue()
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msg = 'this is a test message'
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p = Process(target=server, args=(msg, queue), daemon=True)
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p.start()
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connection_name = queue.get()
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with IPCClient(connection_name, timeout=1) as client:
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assert client.read() == msg.encode()
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client.write(b'') # don't let the server hang up yet, we want to connect again.
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with IPCClient(connection_name, timeout=1) as client:
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assert client.read() == msg.encode()
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client.write(b'test')
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queue.close()
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queue.join_thread()
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p.join()
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assert p.exitcode == 0
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# Run test_connect_twice a lot, in the hopes of finding issues.
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# This is really slow, so it is skipped, but can be enabled if
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# needed to debug IPC issues.
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@pytest.mark.skip
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def test_connect_alot(self) -> None:
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t0 = time.time()
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for i in range(1000):
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try:
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print(i, 'start')
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self.test_connect_twice()
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finally:
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t1 = time.time()
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print(i, t1 - t0)
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sys.stdout.flush()
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t0 = t1
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if __name__ == '__main__':
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main()
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