code: def test_normalization_factor_init(
      self,
      expected_normalization_factor_var,
      expected_phi_inv_var,
      atol,
  ):
      self.assertAllClose(
          self.model.normalization_factor_var[4],
          expected_normalization_factor_var,
          atol=atol,
      )
      self.assertAllClose(
          self.model.phi_inv_var[3], expected_phi_inv_var, atol=atol
      )
  
file_path: geomstats/geomstats/test_cases/learning/expectation_maximization.py
imports: import pytest
  import geomstats.backend
  from geomstats.test.test_case import TestCase
  from geomstats.test_cases.learning._base import BaseEstimatorTestCase
label_desc: Use image node_id 1 for calling the GaussianMixtureModelTestCase obj's underlying member method code with example usage: obj.test_normalization_factor_init(expected_normalization_factor_var, expected_phi_inv_var, atol) without return types