class_docstr: Test CLIP4Clip model
code: def test_forward(self):
      input_ids = torch.randint(low=0, high=2, size=(2, 1, 32)).to(
          self.device
      )
      video = torch.randn(2, 1, 12, 1, 3, 224, 224).to(self.device)
      video_mask = torch.randint(low=0, high=2, size=(2, 1, 12)).to(
          self.device
      )
      loss = self.model(input_ids, video, video_mask)
      self.assertTrue(loss.size() == torch.Size([]))
  
file_path: towhee/tests/unittests/models/clip4clip/test_clip4clip.py
imports: import unittest
  import torch
  import numpy
  from towhee.models.clip import SimpleTokenizer
  from towhee.models.clip4clip import convert_tokens_to_id
  from towhee.models.clip4clip import create_model
  from towhee.models import clip4clip
label_desc: Use image node_id 1 for calling the TestCLIP4Clip obj's underlying member method code with example usage: obj.test_forward() without return types