code: def test_Encoder_output_size():
      encoder = TransformerEncoder(20, output_size=256)
      assert encoder.output_size() == 256
  
imports: import pytest
  import torch
  from espnet2.asr.ctc import CTC
  from espnet2.asr.encoder.transformer_encoder import TransformerEncoder
label_desc: Use image node_id 3 for calling a global function with example usage: test_Encoder_output_size() without return types