class_docstr: Unit test Smart State Class
  TODO: Docstring
class_docstr_tok: ["Unit","test","Smart","State","Class","TODO",":","Docstring"]
docstr: Unit test combine masks
  Parameters
  ----------
  mock_combine_masks : [type]
      [description]
docstr_tok: ["Unit","test","combine","masks","Parameters","--","--","--","--","--","mock_combine_masks",":","[","type","]","[","description","]"]
code: def test_combine_masks(self, mock_combine_masks):
      """
      Unit test combine masks
      Parameters
      ----------
      mock_combine_masks : [type]
          [description]
      """
      state = SmartState()
      state.combine_masks(Mock())
      mock_combine_masks.assert_called()
  
imports: import unittest
  from unittest.mock import patch, Mock
  import pandas
  import numpy
  from shapash.explainer.smart_state import SmartState
label_desc: Use image node_id 15 for calling the TestSmartState obj's underlying member method code with example usage: obj.test_combine_masks(mock_combine_masks) without return types