code: def test_get_multiple(self):
      ds = self._dataset(["utf8_1.txt", "utf8_2.txt"], encoding="utf-8")
      assert ds[0] == ("テスト1\n", "Test1\n")
      assert ds[1] == ("テスト2\n", "テスト2\n")
      assert ds[2] == ("Test3\n", "テスト3\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 12 for calling the TestTextDataset obj's underlying member method code with example usage: obj.test_get_multiple() without return types