class_docstr: Test utils for ConvNeXt
code: def test_block(self):
      data = torch.rand(1, 3, 2, 2).to(self.device)
      layer1 = Block(dim=3, drop_path=0.0).to(self.device)
      outs1 = layer1(data)
      self.assertTrue(outs1.shape == (1, 3, 2, 2))
  
      layer2 = Block(dim=3, drop_path=0.3).to(self.device)
      outs2 = layer2(data)
      self.assertTrue(outs2.shape == (1, 3, 2, 2))
  
imports: import unittest
  import torch
  from towhee.models.convnext.utils import LayerNorm, Block
label_desc: Use image node_id 2 for calling the TestUtils obj's underlying member method code with example usage: obj.test_block() without return types