code: def test_forward_pass(self):
      torch.manual_seed(0)
      loss = TiCoLoss()
      for bsz in range(2, 4):
          x0 = torch.randn((bsz, 256))
          x1 = torch.randn((bsz, 256))
  
          # symmetry
          l1 = loss(x0, x1, update_covariance_matrix=False)
          l2 = loss(x1, x0, update_covariance_matrix=False)
          self.assertAlmostEqual((l1 - l2).pow(2).item(), 0.0, 2)
  
file_path: lightly/tests/loss/test_TicoLoss.py
imports: import unittest
  import pytest
  import torch
  from pytest_mock import MockerFixture
  from torch import distributed
  from lightly.loss.tico_loss import TiCoLoss
label_desc: Use image node_id 1 for calling the TestTiCoLossUnitTest obj's underlying member method code with example usage: obj.test_forward_pass() without return types