code: def test_simplified_kolmogorov_smirnov_test(
      neighbor_histogram, non_neighbor_histogram, expected_statistic
  ):
      nh = np.array(neighbor_histogram)
      nnh = np.array(non_neighbor_histogram)
      statistic = simplified_kolmogorov_smirnov_test(nh, nnh)
      np.testing.assert_almost_equal(statistic, expected_statistic)
  
file_path: cleanlab/tests/datalab/issue_manager/test_noniid.py
imports: import numpy
  import pytest
  from cleanlab.datalab.internal.issue_manager.noniid import NonIIDIssueManager, simplified_kolmogorov_smirnov_test
label_desc: Use image node_id 1 for calling a global function with example usage: test_simplified_kolmogorov_smirnov_test(neighbor_histogram, non_neighbor_histogram, expected_statistic) without return types