code: def test_errors(self):
      ds = self._dataset(
          ["utf8_1.txt"], encoding="ascii", errors="ignore"
      )
      assert ds[0] == "1\n"  # "テスト" is ignored
      assert ds[1] == "2\n"
      assert ds[2] == "Test3\n"
  
imports: from __future__ import unicode_literals
  import os
  import pickle
  import unittest
  import six
  from chainer import datasets
  from chainer import testing
label_desc: Use image node_id 16 for calling the TestTextDataset obj's underlying member method code with example usage: obj.test_errors() without return types