code: def test_model(self):
      dummy_input1 = torch.randn(1, 64)
      dummy_input2 = torch.randn(1, 64)
      out, _ = self.model(dummy_input1, dummy_input2)
      self.assertEqual(out.shape, (1, 32))
  
imports: import unittest
  import os
  import torch
  from towhee.models.mcprop.featurefusion import FeatureFusion
label_desc: Use image node_id 1 for calling the FeatureFusionTest obj's underlying member method code with example usage: obj.test_model() without return types