class_docstr: Test of Bert biencoder and crossencoder.
  
  Checks that Both Biencoder and CrossEncoder of Bert can be trained for about 100
  samples on convai2
code: def setUp(self) -> None:
      super().setUp()
      # set seeds for reproducibility
      torch.manual_seed(seed=42)
  
file_path: ParlAI/tests/nightly/gpu/test_bert.py
imports: import unittest
  import parlai.utils.testing
  import torch
label_desc: Use image node_id 1 for calling the TestBertModel obj's underlying member method code with example usage: obj.setUp() without return types