code: def test_count(self):
      # partially smoke
      tzi1 = dia.test_poisson_zeroinflation_jh(self.res)
  
      tzi2 = dia.test_poisson_zeroinflation_broek(self.res)
      # compare two implementation in special case
      assert_allclose(tzi1[:2], (tzi2[0] ** 2, tzi2[1]), rtol=1e-5)
  
      tzi3 = dia.test_poisson_zeroinflation_jh(self.res, self.exog)
  
      # regression test
      tzi3_1 = (0.79863597832443878, 0.67077736750318928)
      assert_allclose(tzi3, tzi3_1, rtol=5e-4)
      assert_equal(tzi3.df, 2)
  
file_path: statsmodels/statsmodels/discrete/tests/test_diagnostic.py
imports: import numpy
  from numpy.testing import assert_allclose, assert_equal
  import pytest
  from statsmodels.discrete.discrete_model import Poisson
  import statsmodels.discrete._diagnostics_count
  from statsmodels.discrete.diagnostic import PoissonDiagnostic
label_desc: Use image node_id 2 for calling the TestCountDiagnostic obj's underlying member method code with example usage: obj.test_count() without return types