code: def test_txt_fmt1(self):
      # Limited test of custom txt_fmt
      desired = """
  *****************************
  *       * header1 * header2 *
  *****************************
  * stub1 *    0.00 *       1 *
  * stub2 *    2.00 *       3 *
  *****************************
  """
      actual = "\n%s\n" % tbl.as_text()
      # print('actual')
      # print(actual)
      # print('desired')
      # print(desired)
      assert_equal(actual, desired)
  
file_path: statsmodels/statsmodels/iolib/tests/test_table_econpy.py
imports: import numpy
  from numpy.testing import assert_equal
  from statsmodels.iolib.table import Cell, SimpleTable
  from statsmodels.iolib.table import default_latex_fmt
  from statsmodels.iolib.table import default_html_fmt
label_desc: Use image node_id 1 for calling the TestSimpleTable obj's underlying member method code with example usage: obj.test_txt_fmt1() without return types