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Ensure tests do not leave signalhandlers #6667

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Ensure tests do not leave signalhandlers #6667

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Ensure tests do not leave signalhandlers
fjetter Jul 4, 2022
77ea746
Use suggested valid_signals
fjetter Jul 4, 2022
9c37048
Ignore suspend for pytest-timeouts
fjetter Jul 4, 2022
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24 changes: 24 additions & 0 deletions distributed/utils_test.py
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Original file line number Diff line number Diff line change
Expand Up @@ -2476,3 +2476,27 @@ def _bind_port(port):
raise TimeoutError(f"Default ports didn't open up in time for {name_of_test}")

yield


_default_signals = {sig: signal.getsignal(sig) for sig in signal.valid_signals()}

_allowed_overrides = {
signal.SIGSTOP, # pytest-timeout
}


def assert_default_signal_handlers():
assert _default_signals
for sig, default_handler in _default_signals.items():
if sig in _allowed_overrides:
continue
assert (
signal.getsignal(sig) is default_handler
), f"Non-default handler installed for signal {sig}: {signal.getsignal(sig)}"


@pytest.fixture(autouse=True)
def ensure_default_signalhandlers_active():
assert_default_signal_handlers()
yield
assert_default_signal_handlers()