Re-restore elementwise fallback

Author: jbrockmendel

pandas/core/arrays/arrow/array.py

@@ -2396,6 +2396,10 @@ def _str_rpartition(self, sep: str, expand: bool) -> Self:
     def _str_slice(
         self, start: int | None = None, stop: int | None = None, step: int | None = None
     ) -> Self:
+        if pa_version_under11p0:
+            # GH#59724
+            result = self._apply_elementwise(lambda val: val[start:stop:step])
+            return type(self)(pa.chunked_array(result))
         if start is None:
             if step is not None and step < 0:
                 # GH#59710

pandas/tests/extension/test_arrow.py

@@ -2036,12 +2036,11 @@ def test_str_join_string_type():
         [None, 2, None, ["ab", None]],
         [None, 2, 1, ["ab", None]],
         [1, 3, 1, ["bc", None]],
-        pytest.param(
+        (
             None,
             None,
             -1,
             ["dcba", None],
-            marks=pytest.mark.xfail(pa_version_under11p0, reason="Empty result"),
         ),
     ],
 )

pandas/tests/strings/test_string_array.py

@@ -2,7 +2,6 @@
 import pytest
 
 from pandas._libs import lib
-from pandas.compat import pa_version_under11p0
 
 from pandas import (
     NA,
@@ -26,10 +25,6 @@ def test_string_array(nullable_string_dtype, any_string_method, request):
             getattr(b.str, method_name)(*args, **kwargs)
         return
 
-    if b.dtype.storage == "pyarrow" and pa_version_under11p0 and method_name == "slice":
-        mark = pytest.mark.xfail(reason="Negative buffer resize")
-        request.applymarker(mark)
-
     expected = getattr(a.str, method_name)(*args, **kwargs)
     result = getattr(b.str, method_name)(*args, **kwargs)
 

pandas/tests/strings/test_strings.py

@@ -6,8 +6,6 @@
 import numpy as np
 import pytest
 
-from pandas.compat import pa_version_under11p0
-
 from pandas import (
     DataFrame,
     Index,
@@ -407,10 +405,6 @@ def test_pipe_failures(any_string_dtype):
 )
 def test_slice(start, stop, step, expected, any_string_dtype, request):
     ser = Series(["aafootwo", "aabartwo", np.nan, "aabazqux"], dtype=any_string_dtype)
-    if any_string_dtype == "string[pyarrow]" and pa_version_under11p0:
-        mark = pytest.mark.xfail(reason="Empty result")
-        request.applymarker(mark)
-
     result = ser.str.slice(start, stop, step)
     expected = Series(expected, dtype=any_string_dtype)
     tm.assert_series_equal(result, expected)