class_docstr: Test ActionClip model
code: def test_encode_text(self):
      text_features = self.model.encode_text(self.text)
      self.assertEqual(text_features.shape, (32, 512))
  
imports: import unittest
  import torch
  from towhee.models import action_clip
  from towhee.models import clip
label_desc: Use image node_id 2 for calling the TestActionClip obj's underlying member method code with example usage: obj.test_encode_text() without return types