code: def test_allinone(self):
      vcoph = VCOPHeader(feature_size=4)
      x = torch.rand(2, 3, 4)
      out = vcoph(x)
      self.assertTrue(out.shape == torch.Size([2, 6]))
  
imports: import unittest
  import torch
  from towhee.models.allinone.allinone import VCOPHeader
label_desc: Use image node_id 1 for calling the AllinoneTest obj's underlying member method code with example usage: obj.test_allinone() without return types