class_docstr: Class of Unit test for Mask
  TODO: Docstring
docstr: test of initialization of mask
docstr_tok: ["test","of","initialization","of","mask"]
code: def test_init_mask(self):
      """
      test of initialization of mask
      """
      column_name = ["col1", "col2"]
      s_ord = pd.DataFrame(
          [[0.1, 0.43], [-0.78, 0.002], [0.62, -0.008]],
          columns=column_name,
      )
      expected = pd.DataFrame(
          [[True, True], [True, True], [True, True]],
          columns=column_name,
      )
      output = init_mask(s_ord)
      assert output.equals(expected)
  
file_path: shapash/tests/unit_tests/manipulation/test_mask.py
imports: import unittest
  import pandas
  from shapash.manipulation.mask import compute_masked_contributions, init_mask
label_desc: Use image node_id 4 for calling the TestMask obj's underlying member method code with example usage: obj.test_init_mask() without return types