Function _init_then_fork

tests/test_read_write_unit.py:606–615

(
        self: _Sub,
        lock_file: str | os.PathLike[str],
        timeout: float = -1,
        *,
        blocking: bool = True,
        is_singleton: bool = True,
    )

    original_init = _Sub.__init__

    def _init_then_fork(
        self: _Sub,
        lock_file: str | os.PathLike[str],
        timeout: float = -1,
        *,
        blocking: bool = True,
        is_singleton: bool = True,
    ) -> None:
        original_init(self, lock_file, timeout, blocking=blocking, is_singleton=is_singleton)
        pid_box[0] += 1

    mocker.patch.object(_Sub, "__init__", _init_then_fork)