def METHOD_NAME(self):
    # Pass non-existing Unicode filenames all over the place.
    for name in self.files:
        name = "not_" + name
        self._apply_failure(open, name)
        self._apply_failure(os.stat, name)
        self._apply_failure(os.chdir, name)
        self._apply_failure(os.rmdir, name)
        self._apply_failure(os.remove, name)
        self._apply_failure(os.listdir, name)