Fix tests

Author: jbrockmendel

pandas/tests/strings/test_string_array.py

@@ -2,6 +2,7 @@
 import pytest
 
 from pandas._libs import lib
+from pandas.compat import pa_version_under11p0
 
 from pandas import (
     NA,
@@ -13,7 +14,7 @@
 
 
 @pytest.mark.filterwarnings("ignore:Falling back")
-def test_string_array(nullable_string_dtype, any_string_method):
+def test_string_array(nullable_string_dtype, any_string_method, request):
     method_name, args, kwargs = any_string_method
 
     data = ["a", "bb", np.nan, "ccc"]
@@ -25,6 +26,10 @@ def test_string_array(nullable_string_dtype, any_string_method):
             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

@@ -395,19 +395,22 @@ def test_pipe_failures(any_string_dtype):
     [
         (2, 5, None, ["foo", "bar", np.nan, "baz"]),
         (0, 3, -1, ["", "", np.nan, ""]),
-        pytest.param(
+        (
             None,
             None,
             -1,
             ["owtoofaa", "owtrabaa", np.nan, "xuqzabaa"],
-            marks=pytest.mark.xfail(pa_version_under11p0, reason="Empty result"),
         ),
         (3, 10, 2, ["oto", "ato", np.nan, "aqx"]),
         (3, 0, -1, ["ofa", "aba", np.nan, "aba"]),
     ],
 )
-def test_slice(start, stop, step, expected, 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)