code: def test_wrong_type_target_column_name(df):
      """Raise TypeError if wrong type is provided for `target_column_name`."""
      with pytest.raises(TypeError):
          df.coalesce("a", "b", target_column_name=["new_name"])
  
file_path: pyjanitor/tests/functions/test_coalesce.py
imports: import numpy
  import pandas
  import pytest
  from pandas.testing import assert_frame_equal
label_desc: Use image node_id 3 for calling a global function with example usage: test_wrong_type_target_column_name(df) without return types