code: def test_equality(self):
      index_field1 = IndexField(4, self.text)
      index_field2 = IndexField(4, self.text)
      index_field3 = IndexField(
          4,
          TextField(
              [
                  Token(t)
                  for t in ["AllenNLP", "is", "the", "bomb", "!"]
              ],
              {"words": SingleIdTokenIndexer("words")},
          ),
      )
  
      assert index_field1 == 4
      assert index_field1 == index_field1
      assert index_field1 == index_field2
  
      assert index_field1 != index_field3
      assert index_field2 != index_field3
      assert index_field3 == index_field3
  
file_path: allennlp/tests/data/fields/index_field_test.py
imports: import numpy
  import pytest
  from allennlp.common.checks import ConfigurationError
  from allennlp.common.testing import AllenNlpTestCase
  from allennlp.data import Token
  from allennlp.data.fields import TextField, IndexField
  from allennlp.data.token_indexers import SingleIdTokenIndexer
label_desc: Use image node_id 6 for calling the TestIndexField obj's underlying member method code with example usage: obj.test_equality() without return types