def test_lock_helper(self, open_mock):
expect_path = '/path/to/some/file.txt.lck'
expect_flags = os.O_CREAT | os.O_EXCL | os.O_WRONLY
expect_mode = 0o600
sut = _Lockfile.open('/path/to/some/file.txt.lck')
open_mock.assert_called_once_with(expect_path, expect_flags, expect_mode)
unlink_mock = Mock()
close_mock = Mock()
sut.close(os_unlink=unlink_mock, os_close=close_mock)
unlink_mock.assert_called_once_with(expect_path)
close_mock.assert_called_once_with(99)
def test_lock_helper_enoent(self, open_mock):
with ExpectedException(LockError):
sut = _Lockfile.open('/path/to/some/file.txt.lck')