code: def test_error_when_arbitrary_number_is_string():
      with pytest.raises(ValueError):
          ArbitraryNumberImputer(arbitrary_number="arbitrary")
  
file_path: feature_engine/tests/test_imputation/test_arbitrary_number_imputer.py
imports: import pandas
  import pytest
  from feature_engine.imputation import ArbitraryNumberImputer
label_desc: Use image node_id 3 for calling a global function with example usage: test_error_when_arbitrary_number_is_string() without return types