code: def test_no_docs(self):
      np.testing.assert_array_equal(
          self.term_cat_freq.get_doc_indices(), []
      )
      np.testing.assert_array_equal(self.term_cat_freq.get_texts(), [])
  
file_path: scattertext/scattertext/test/test_termCategoryFrequencies.py
imports: from unittest import TestCase
  import numpy
  import pandas
  from scattertext.ScatterChartData import ScatterChartData
  from scattertext.TermCategoryFrequencies import TermCategoryFrequencies
label_desc: Use image node_id 8 for calling the TestTermCategoryFrequencies obj's underlying member method code with example usage: obj.test_no_docs() without return types