code: def test_invalid_concat_type_err() -> None:
      df = pl.DataFrame(
          {
              "foo": [1, 2],
              "bar": [6, 7],
              "ham": ["a", "b"],
          }
      )
      with pytest.raises(
          ValueError,
          match="DataFrame `how` must be one of {'vertical', 'vertical_relaxed', 'diagonal', 'diagonal_relaxed', 'horizontal', 'align'}, got 'sausage'",
      ):
          pl.concat([df, df], how="sausage")
  
imports: from __future__ import annotations
  import io
  from datetime import date, datetime, time
  from decimal import Decimal
  from typing import TYPE_CHECKING, Any
  import numpy
  import pytest
  import polars
  from polars.datatypes.convert import dtype_to_py_type
  from polars.exceptions import InvalidOperationError
label_desc: Use image node_id 18 for calling a global function with example usage: test_invalid_concat_type_err() without return types