code: def test_main(self):
      df = build_hamlet_jz_df()
  
imports: from unittest import TestCase
  from scattertext.OneClassScatterChart import OneClassScatterChart
  from scattertext.test.test_termDocMatrixFactory import build_hamlet_jz_term_doc_mat, build_hamlet_jz_df
label_desc: Use image node_id 1 for calling the TestOneClassScatterChart obj's underlying member method code with example usage: obj.test_main() without return types