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# test_help.py - Ensure scripts can run --help.
#
# Copyright (C) 2010, Stefano Rivera <stefanor@debian.org>
#
# Permission to use, copy, modify, and/or distribute this software for any
# purpose with or without fee is hereby granted, provided that the above
# copyright notice and this permission notice appear in all copies.
#
# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
# REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
# AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
# INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
# LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
# OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
# PERFORMANCE OF THIS SOFTWARE.
import fcntl
import os
import select
import signal
import subprocess
import time
import typing
import unittest
import setup
TIMEOUT = 5
class HelpTestCase(unittest.TestCase):
@classmethod
def populate(cls) -> None:
for script in setup.SCRIPTS:
setattr(cls, "test_" + script, cls.make_help_tester(script))
@classmethod
def make_help_tester(cls, script: str) -> typing.Callable[[typing.Any], None]:
def tester(self: typing.Any) -> None:
with subprocess.Popen(
["./" + script, "--help"],
close_fds=True,
stdin=subprocess.DEVNULL,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE,
) as process:
started = time.time()
out = []
assert process.stdout
assert process.stderr
fds = [process.stdout.fileno(), process.stderr.fileno()]
for file_descriptor in fds:
fcntl.fcntl(
file_descriptor,
fcntl.F_SETFL,
fcntl.fcntl(file_descriptor, fcntl.F_GETFL) | os.O_NONBLOCK,
)
while time.time() - started < TIMEOUT:
for file_descriptor in select.select(fds, [], fds, TIMEOUT)[0]:
out.append(os.read(file_descriptor, 1024))
if process.poll() is not None:
break
if process.poll() is None:
os.kill(process.pid, signal.SIGTERM)
time.sleep(1)
if process.poll() is None:
os.kill(process.pid, signal.SIGKILL)
self.assertEqual(
process.poll(),
0,
f"{script} failed to return usage within {TIMEOUT} seconds.\n"
f"Output:\n{b''.join(out).decode()}",
)
return tester
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