code: def test_encoder_output_size():
      encoder = EBranchformerEncoder(20, output_size=256)
      assert encoder.output_size() == 256
  
imports: import pytest
  import torch
  from espnet2.asr.ctc import CTC
  from espnet2.asr.encoder.e_branchformer_encoder import EBranchformerEncoder
label_desc: Use image node_id 4 for calling a global function with example usage: test_encoder_output_size() without return types