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[test] Add test_locked_file

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pukkandan 2022-04-07 11:30:46 +05:30
parent b63837bce0
commit b506289fe2
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2 changed files with 34 additions and 2 deletions
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31
test/test_utils.py
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@ -56,6 +56,7 @@ from yt_dlp.utils import (
is_html,
js_to_json,
limit_length,
locked_file,
merge_dicts,
mimetype2ext,
month_by_name,
@ -1795,6 +1796,36 @@ Line 1
self.assertEqual(Config.hide_login_info(['--username=foo']),
['--username=PRIVATE'])
def test_locked_file(self):
TEXT = 'test_locked_file\n'
FILE = 'test_locked_file.ytdl'
MODES = 'war' # Order is important
try:
for lock_mode in MODES:
with locked_file(FILE, lock_mode, False) as f:
if lock_mode == 'r':
self.assertEqual(f.read(), TEXT * 2, 'Wrong file content')
else:
f.write(TEXT)
for test_mode in MODES:
testing_write = test_mode != 'r'
try:
with locked_file(FILE, test_mode, False):
pass
except (BlockingIOError, PermissionError):
if not testing_write: # FIXME
print(f'Known issue: Exclusive lock ({lock_mode}) blocks read access ({test_mode})')
continue
self.assertTrue(testing_write, f'{test_mode} is blocked by {lock_mode}')
else:
self.assertFalse(testing_write, f'{test_mode} is not blocked by {lock_mode}')
finally:
try:
os.remove(FILE)
except Exception:
pass
if __name__ == '__main__':
unittest.main()

5
yt_dlp/utils.py
View file

@ -684,8 +684,9 @@ def sanitize_open(filename, open_mode):
try:
try:
if sys.platform == 'win32':
# FIXME: Windows only has mandatory locking which also locks the file from being read.
# So for now, don't lock the file on windows. Ref: https://github.com/yt-dlp/yt-dlp/issues/3124
# FIXME: An exclusive lock also locks the file from being read.
# Since windows locks are mandatory, don't lock the file on windows (for now).
# Ref: https://github.com/yt-dlp/yt-dlp/issues/3124
raise LockingUnsupportedError()
stream = locked_file(filename, open_mode, block=False).__enter__()
except LockingUnsupportedError: