BUG: Apply xfail to handle unsupported int/str comparison in test_sort_values_with_missing

Author: pelagiavlas

pandas/tests/indexes/test_common.py

@@ -454,6 +454,10 @@ def test_sort_values_with_missing(index_with_missing, na_position, request):
     # GH 35584. Test that sort_values works with missing values,
     # sort non-missing and place missing according to na_position
 
+    non_na_values = [x for x in index_with_missing if pd.notna(x)]
+    if len({type(x) for x in non_na_values}) > 1:
+        pytest.xfail("Sorting fails due to heterogeneous types in index (int vs str)")
+
     if isinstance(index_with_missing, CategoricalIndex):
         request.applymarker(
             pytest.mark.xfail(