class_docstr: Test ActionClip utils
code: def test_similarity(self):
      text_features = torch.ones(6, 10)
      fusion_features = torch.ones(1, 10)
      similarity = action_clip.get_similarity(
          text_features, fusion_features, num_text_augs=3, norm=True
      )
      self.assertTrue(similarity[0].tolist() == [0.5, 0.5])
  
imports: import unittest
  import torch
  from towhee.models import action_clip
label_desc: Use image node_id 2 for calling the TestUtils obj's underlying member method code with example usage: obj.test_similarity() without return types