class_docstr: Test ActionClip model with pretrained clip
class_docstr_tok: ["Test","ActionClip","model","with","pretrained","clip"]
code: def test_pretrained(self):
      vis_feats = self.model.encode_video(self.video)
      text_features = self.model.encode_text(self.text)
      num_augs = int(text_features.size(0) / len(self.text))
      similarity = action_clip.get_similarity(
          text_features, vis_feats, num_text_augs=num_augs
      )
      self.assertEqual(similarity.shape, (1, 2))
  
imports: import unittest
  import torch
  from towhee.models import action_clip
label_desc: Use image node_id 1 for calling the TestPretrained obj's underlying member method code with example usage: obj.test_pretrained() without return types