code: def test_dccrn_separator_invalid_type():
      with pytest.raises(ValueError):
          DCCRNSeparator(
              input_dim=10,
              masking_mode="fff",
          )
  
imports: import pytest
  import torch
  from packaging.version import parse
  from torch_complex import ComplexTensor
  from espnet2.enh.separator.dccrn_separator import DCCRNSeparator
label_desc: Use image node_id 2 for calling a global function with example usage: test_dccrn_separator_invalid_type() without return types