code: def test_basic(self):
      assert_equal(
          self.res.ind, np.arange(len(self.res.ind), dtype=int)
      )
      assert_equal(self.res.r0t.shape, (self.nobs_r, 8))
  
imports: import os
  import warnings
  import numpy
  from numpy.testing import assert_almost_equal, assert_equal
  import pandas
  import pytest
  from statsmodels.tools.sm_exceptions import HypothesisTestWarning
  from statsmodels.tsa.vector_ar.vecm import coint_johansen
label_desc: Use image node_id 1 for calling the CheckCointJoh obj's underlying member method code with example usage: obj.test_basic() without return types