code: def test_ocsb_gen_lags():
      z_res = OCSBTest._gen_lags(austres, 0)
      assert z_res.shape == austres.shape
      assert (z_res == 0).all()
  
imports: from pmdarima.arima.seasonality import CHTest, decompose, OCSBTest
  from pmdarima.arima.utils import nsdiffs
  from pmdarima.compat.pytest import pytest_error_str
  from pmdarima.datasets import load_airpassengers, load_ausbeer, load_austres, load_wineind
  import numpy
  from numpy.testing import assert_almost_equal, assert_array_equal
  from sklearn.utils.validation import check_random_state
  import pytest
  from unittest import mock
label_desc: Use image node_id 10 for calling a global function with example usage: test_ocsb_gen_lags() without return types