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Original file line number | Diff line number | Diff line change |
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"""Test the filesystem utils of VaRA-TS.""" | ||
import errno | ||
import os | ||
import unittest | ||
import uuid | ||
from fcntl import flock, LOCK_EX, LOCK_NB, LOCK_UN | ||
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from varats.utils.filesystem_util import lock_file | ||
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class TestFileLock(unittest.TestCase): | ||
"""Tests whether the lock context manager works correctly.""" | ||
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def test_file_locking(self): | ||
"""Test that the file is locked when in a context manager.""" | ||
tmp_lock_file = "/tmp/lock-test.lock" | ||
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with lock_file(tmp_lock_file): | ||
# File should automatically be created | ||
self.assertTrue(os.path.exists(tmp_lock_file)) | ||
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f = os.open(tmp_lock_file, os.O_RDONLY) | ||
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with self.assertRaises(OSError) as context: | ||
# A non-blocking attempt to lock the file again should fail immediately | ||
flock(f, LOCK_EX | LOCK_NB) | ||
os.close(f) | ||
self.assertEqual(context.exception.errno, errno.EWOULDBLOCK) | ||
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# Attempting to lock the file and immediately unlocking should now work | ||
f = os.open(tmp_lock_file, os.O_RDONLY) | ||
flock(f, LOCK_EX | LOCK_NB) | ||
flock(f, LOCK_UN) | ||
os.close(f) | ||
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def test_lock_file_new_folder(self): | ||
"""Test that the lock context manager works correctly when the lock file | ||
is in a new folder.""" | ||
tmp_lock_file = f"/tmp/{uuid.uuid4()}" | ||
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while os.path.isdir(tmp_lock_file): | ||
tmp_lock_file = f"/tmp/{uuid.uuid4()}" | ||
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tmp_lock_file += "/lock-test.lock" | ||
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with lock_file(tmp_lock_file): | ||
# File should automatically be created | ||
self.assertTrue(os.path.exists(tmp_lock_file)) |
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