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import os
import sys
# Tests variant functions which also accept file descriptors,
# dir_fd and follow_symlinks.
def test_have_functions():
assert os.stat in os.supports_fd # fstat() is supported everywhere
if os.name != 'nt':
assert os.chdir in os.supports_fd # fchdir()
else:
assert os.chdir not in os.supports_fd
if os.name == 'posix':
assert os.open in os.supports_dir_fd # openat()
def test_popen():
for i in range(5):
stream = os.popen('echo 1')
res = stream.read()
assert res == '1\n'
assert stream.close() is None
def test_popen_with():
stream = os.popen('echo 1')
with stream as fp:
res = fp.read()
assert res == '1\n'
def test_pickle():
import pickle
st = os.stat('.')
# print(type(st).__module__)
s = pickle.dumps(st)
# print(repr(s))
new = pickle.loads(s)
assert new == st
assert type(new) is type(st)
if hasattr(os, "fork") and not sys.platform == 'darwin':
def test_fork_hook_creates_thread_bug():
# Test fixed in 3.10, no longer errors
import threading
def daemon():
while 1:
time.sleep(10)
daemon_thread = None
def create_thread():
nonlocal daemon_thread
daemon_thread = threading.Thread(name="b", target=daemon, daemon=True)
daemon_thread.start()
os.register_at_fork(after_in_child=create_thread)
pid = os.fork()
if pid == 0: # child
os._exit(daemon_thread._ident in threading._active)
pid1, status1 = os.waitpid(pid, 0)
assert status1 == 0
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