code: def test_encoder_invalid_rel_pos_combination():
      with pytest.raises(AssertionError):
          EBranchformerEncoder(
              20,
              rel_pos_type="latest",
              pos_enc_layer_type="legacy_rel_pos",
              attention_layer_type="legacy_rel_sselfattn",
          )
      with pytest.raises(AssertionError):
          EBranchformerEncoder(
              20,
              pos_enc_layer_type="rel_pos",
              attention_layer_type="legacy_rel_sselfattn",
          )
      with pytest.raises(AssertionError):
          EBranchformerEncoder(
              20,
              pos_enc_layer_type="legacy_rel_pos",
              attention_layer_type="rel_sselfattn",
          )
      with pytest.raises(AssertionError):
          EBranchformerEncoder(
              20,
              attention_layer_type="fast_selfattn",
              pos_enc_layer_type="rel_pos",
          )
  
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 3 for calling a global function with example usage: test_encoder_invalid_rel_pos_combination() without return types