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How to use register_cleanup_lock_removal method in Pytest

Best Python code snippet using pytest

test_tmpdir.py

Source:test_tmpdir.py

...211    def test_lock_register_cleanup_removal(self, tmp_path):212        from _pytest.pathlib import create_cleanup_lock, register_cleanup_lock_removal213        lock = create_cleanup_lock(tmp_path)214        registry = []215        register_cleanup_lock_removal(lock, register=registry.append)216        cleanup_func, = registry217        assert lock.is_file()218        cleanup_func(original_pid="intentionally_different")219        assert lock.is_file()220        cleanup_func()221        assert not lock.exists()222        cleanup_func()223        assert not lock.exists()224    def _do_cleanup(self, tmp_path):225        self.test_make(tmp_path)226        from _pytest.pathlib import cleanup_numbered_dir227        cleanup_numbered_dir(228            root=tmp_path,229            prefix=self.PREFIX,...

pathlib.py

Source:pathlib.py

...112        os.close(fd)113        if not lock_path.is_file():114            raise EnvironmentError("lock path got renamed after successful creation")115        return lock_path116def register_cleanup_lock_removal(lock_path, register=atexit.register):117    """registers a cleanup function for removing a lock, by default on atexit"""118    pid = os.getpid()119    def cleanup_on_exit(lock_path=lock_path, original_pid=pid):120        current_pid = os.getpid()121        if current_pid != original_pid:122            # fork123            return124        try:125            lock_path.unlink()126        except (OSError, IOError):127            pass128    return register(cleanup_on_exit)129def maybe_delete_a_numbered_dir(path):130    """removes a numbered directory if its lock can be obtained and it does not seem to be in use"""131    lock_path = None132    try:133        lock_path = create_cleanup_lock(path)134        parent = path.parent135        garbage = parent.joinpath("garbage-{}".format(uuid.uuid4()))136        path.rename(garbage)137        rmtree(garbage, force=True)138    except (OSError, EnvironmentError):139        #  known races:140        #  * other process did a cleanup at the same time141        #  * deletable folder was found142        #  * process cwd (Windows)143        return144    finally:145        # if we created the lock, ensure we remove it even if we failed146        # to properly remove the numbered dir147        if lock_path is not None:148            try:149                lock_path.unlink()150            except (OSError, IOError):151                pass152def ensure_deletable(path, consider_lock_dead_if_created_before):153    """checks if a lock exists and breaks it if its considered dead"""154    if path.is_symlink():155        return False156    lock = get_lock_path(path)157    if not lock.exists():158        return True159    try:160        lock_time = lock.stat().st_mtime161    except Exception:162        return False163    else:164        if lock_time < consider_lock_dead_if_created_before:165            lock.unlink()166            return True167        else:168            return False169def try_cleanup(path, consider_lock_dead_if_created_before):170    """tries to cleanup a folder if we can ensure it's deletable"""171    if ensure_deletable(path, consider_lock_dead_if_created_before):172        maybe_delete_a_numbered_dir(path)173def cleanup_candidates(root, prefix, keep):174    """lists candidates for numbered directories to be removed - follows py.path"""175    max_existing = max(map(parse_num, find_suffixes(root, prefix)), default=-1)176    max_delete = max_existing - keep177    paths = find_prefixed(root, prefix)178    paths, paths2 = itertools.tee(paths)179    numbers = map(parse_num, extract_suffixes(paths2, prefix))180    for path, number in zip(paths, numbers):181        if number <= max_delete:182            yield path183def cleanup_numbered_dir(root, prefix, keep, consider_lock_dead_if_created_before):184    """cleanup for lock driven numbered directories"""185    for path in cleanup_candidates(root, prefix, keep):186        try_cleanup(path, consider_lock_dead_if_created_before)187    for path in root.glob("garbage-*"):188        try_cleanup(path, consider_lock_dead_if_created_before)189def make_numbered_dir_with_cleanup(root, prefix, keep, lock_timeout):190    """creates a numbered dir with a cleanup lock and removes old ones"""191    e = None192    for i in range(10):193        try:194            p = make_numbered_dir(root, prefix)195            lock_path = create_cleanup_lock(p)196            register_cleanup_lock_removal(lock_path)197        except Exception as exc:198            e = exc199        else:200            consider_lock_dead_if_created_before = p.stat().st_mtime - lock_timeout201            cleanup_numbered_dir(202                root=root,203                prefix=prefix,204                keep=keep,205                consider_lock_dead_if_created_before=consider_lock_dead_if_created_before,206            )207            return p208    assert e is not None209    raise e210def resolve_from_str(input, root):...

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