code: def test_svtr_encoder(self):
      model = SVTREncoder(
          img_size=self.img.shape[-2:],
          in_channels=self.img.shape[1],
      )
      model.train()
      self.assertEqual(
          model(self.img).shape, torch.Size([1, 192, 1, 25])
      )
  
imports: from unittest import TestCase
  import torch
  from mmocr.models.textrecog.encoders.svtr_encoder import AttnMixer, ConvMixer, MerigingBlock, MixingBlock, OverlapPatchEmbed, SVTREncoder
label_desc: Use image node_id 2 for calling the TestSVTREncoder obj's underlying member method code with example usage: obj.test_svtr_encoder() without return types