class_docstr: Tests utility functions.
      
docstr: Tests :func:`texar.tf.utils.uniquify_str`.
          
docstr_tok: ["Tests",":","func",":","`","texar.tf.utils.uniquify_str","`","."]
code: def test_uniquify_str(self):
      """Tests :func:`texar.tf.utils.uniquify_str`."""
      str_set = ["str"]
      unique_str = utils.uniquify_str("str", str_set)
      self.assertEqual(unique_str, "str_1")
  
      str_set.append("str_1")
      str_set.append("str_2")
      unique_str = utils.uniquify_str("str", str_set)
      self.assertEqual(unique_str, "str_3")
  
file_path: texar/tests/utils/utils_test.py
imports: import tempfile
  import numpy
  import tensorflow
  from texar.tf.utils import utils
  from texar.tf.data.vocabulary import Vocab
label_desc: Use image node_id 7 for calling the UtilsTest obj's underlying member method code with example usage: obj.test_uniquify_str() without return types