code: def test_join_level_corner_case(idx):
      # some corner cases
      index = Index(["three", "one", "two"])
      result = index.join(idx, level="second")
      assert isinstance(result, MultiIndex)
  
      with pytest.raises(
          TypeError, match="Join.*MultiIndex.*ambiguous"
      ):
          idx.join(idx, level=1)
  
file_path: pandas/pandas/tests/indexes/multi/test_join.py
imports: import numpy
  import pytest
  from pandas import DataFrame, Index, Interval, MultiIndex, Series, StringDtype
  import pandas._testing
label_desc: Use image node_id 2 for calling a global function with example usage: test_join_level_corner_case(idx) without return types