code: def test_loss_fct(self):
      loss_fct = _LossAdapter2DTo1D(BCEWithLogitsLoss(reduction="none"))
  
      input = torch.randn(5, 3)
      target = torch.empty(5, 3).random_(2)
  
      loss = loss_fct(input, target)
  
      self.assertEqual(1, len(loss.shape))
      self.assertEqual(5, loss.shape[0])
  
imports: import unittest
  import pytest
  from small_text.integrations.pytorch.exceptions import PytorchNotFoundError
label_desc: Use image node_id 1 for calling the LossTest obj's underlying member method code with example usage: obj.test_loss_fct() without return types