code: def test_invalid_dtype_backend(self):
      msg = (
          "dtype_backend numpy is invalid, only 'numpy_nullable' and "
          "'pyarrow' are allowed."
      )
      df = pd.DataFrame({"int": list(range(1, 4))})
      with tm.ensure_clean("tmp.feather") as path:
          df.to_feather(path)
          with pytest.raises(ValueError, match=msg):
              read_feather(path, dtype_backend="numpy")
  
imports: import numpy
  import pytest
  import pandas
  import pandas._testing
  from pandas.core.arrays import ArrowStringArray, StringArray
  from pandas.io.feather_format import read_feather, to_feather
label_desc: Use image node_id 17 for calling the TestFeather obj's underlying member method code with example usage: obj.test_invalid_dtype_backend() without return types