code: def test_encoding_multiple(self):
      ds = self._dataset(
          ["ascii_1.txt", "utf8_1.txt"], encoding=["ascii", "utf-8"]
      )
      assert ds[0] == ("hello\n", "テスト1\n")
      assert ds[1] == ("world\n", "テスト2\n")
      assert ds[2] == ("test\n", "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 15 for calling the TestTextDataset obj's underlying member method code with example usage: obj.test_encoding_multiple() without return types