Revert changes to test_strings.py

Author: Aniketsy

pandas/core/arrays/string_arrow.py

@@ -344,8 +344,8 @@ def _str_contains(
         na=lib.no_default,
         regex: bool = True,
     ):
-        if isinstance(pat, re.Pattern):
-            pat = pat.pattern
+        if (isinstance(pat, re.Pattern) and regex) or flags:
+            return super()._str_contains(pat, case, flags, na, regex)
 
         return ArrowStringArrayMixin._str_contains(self, pat, case, flags, na, regex)
 

pandas/tests/strings/test_strings.py

@@ -2,13 +2,10 @@
     datetime,
     timedelta,
 )
-import re
 
 import numpy as np
 import pytest
 
-pytest.importorskip("pyarrow")
-
 from pandas import (
     DataFrame,
     Index,
@@ -179,16 +176,6 @@ def test_empty_str_methods(any_string_dtype):
     tm.assert_series_equal(empty_str, empty.str.translate(table))
 
 
-@pytest.mark.parametrize("dtype", ["string[pyarrow]"])
-def test_str_contains_compiled_regex_arrow_dtype(dtype):
-    ser = Series(["foo", "bar", "baz"], dtype=dtype)
-    pat = re.compile("ba.")
-    result = ser.str.contains(pat)
-    assert str(result.dtype) == "bool[pyarrow]"
-    expected = Series([False, True, True], dtype="bool[pyarrow]")
-    tm.testing.assert_series_equal(result, expected)
-
-
 @pytest.mark.parametrize(
     "method, expected",
     [