python runtime_error ai_generated true

FAILED tests/test_network.py::test_connect - pytest.PytestUnraisableExceptionWarning: Exception ignored in: <socket.socket fd=5> ResourceWarning: unclosed <socket.socket fd=5, family=AddressFamily.AF_INET, type=SocketKind.SOCK_STREAM, proto=0, laddr=('127.0.0.1', 54321), raddr=('127.0.0.1', 8080)>

ID: python/pytest-warnings-as-errors-unclosed-socket

Also available as: JSON · Markdown · 中文
80%Fix Rate
85%Confidence
0Evidence
2024-07-03First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
7.x active — — —
8.x active — — —

Root Cause

pytest is configured with filterwarnings = error, so ResourceWarning from an unclosed socket (e.g., a connection not closed in a fixture or test) is promoted to an error and fails the test.

generic

中文

pytest 配置了 filterwarnings = error，因此未关闭的 socket（例如 fixture 或测试中未关闭的连接）产生的 ResourceWarning 被提升为错误并导致测试失败。

Workarounds

  1. 95% success 
    import socket
import pytest

@pytest.fixture
def conn():
    s = socket.create_connection(('127.0.0.1', 8080))
    yield s
    s.close()

def test_connect(conn):
    ...
  2. 90% success 
    from contextlib import closing

def test_connect():
    with closing(socket.create_connection(('127.0.0.1', 8080))) as s:
        ...

Dead Ends

Common approaches that don't work:

  1. 70% fail

    Hides real resource leaks in production code and can mask other warnings-as-errors that you do want to catch.

  2. 65% fail

    gc.collect() may run before the socket's __del__ or may not close the socket deterministically; the warning can still fire during interpreter shutdown.