From 12e9013e2d740d00a1d0b60d7bcf4b0e997c239e Mon Sep 17 00:00:00 2001
From: Patrick Hoefler <61934744+phofl@users.noreply.github.com>
Date: Sun, 9 Jul 2023 17:36:09 +0200
Subject: [PATCH 1/3] CoW: Fix test that is failing with new arrow version

---
 pandas/compat/pyarrow.py              |  1 +
 pandas/tests/copy_view/test_astype.py | 14 +++++++++-----
 2 files changed, 10 insertions(+), 5 deletions(-)

diff --git a/pandas/compat/pyarrow.py b/pandas/compat/pyarrow.py
index 020ec346490ff..613e7f8e00912 100644
--- a/pandas/compat/pyarrow.py
+++ b/pandas/compat/pyarrow.py
@@ -14,6 +14,7 @@
     pa_version_under9p0 = _palv < Version("9.0.0")
     pa_version_under10p0 = _palv < Version("10.0.0")
     pa_version_under11p0 = _palv < Version("11.0.0")
+    pa_version_under12p0 = _palv < Version("12.0.0")
 except ImportError:
     pa_version_under7p0 = True
     pa_version_under8p0 = True
diff --git a/pandas/tests/copy_view/test_astype.py b/pandas/tests/copy_view/test_astype.py
index e89bdd5af348d..1fc8ad7b3659b 100644
--- a/pandas/tests/copy_view/test_astype.py
+++ b/pandas/tests/copy_view/test_astype.py
@@ -12,6 +12,7 @@
     date_range,
 )
 import pandas._testing as tm
+from pandas.compat.pyarrow import pa_version_under12p0
 from pandas.tests.copy_view.util import get_array
 
 
@@ -200,11 +201,14 @@ def test_astype_arrow_timestamp(using_copy_on_write):
     result = df.astype("timestamp[ns][pyarrow]")
     if using_copy_on_write:
         assert not result._mgr._has_no_reference(0)
-        # TODO(CoW): arrow is not setting copy=False in the Series constructor
-        # under the hood
-        assert not np.shares_memory(
-            get_array(df, "a"), get_array(result, "a")._pa_array
-        )
+        if pa_version_under12p0:
+            assert not np.shares_memory(
+                get_array(df, "a"), get_array(result, "a")._pa_array
+            )
+        else:
+            assert np.shares_memory(
+                get_array(df, "a"), get_array(result, "a")._pa_array
+            )
 
 
 def test_convert_dtypes_infer_objects(using_copy_on_write):

From 6a1c42b2837bbb817424079f7833b2ce2c96f001 Mon Sep 17 00:00:00 2001
From: Patrick Hoefler <61934744+phofl@users.noreply.github.com>
Date: Thu, 13 Jul 2023 15:09:12 -0500
Subject: [PATCH 2/3] RUn pre commit

---
 pandas/tests/copy_view/test_astype.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pandas/tests/copy_view/test_astype.py b/pandas/tests/copy_view/test_astype.py
index 1fc8ad7b3659b..4b751ad452ec4 100644
--- a/pandas/tests/copy_view/test_astype.py
+++ b/pandas/tests/copy_view/test_astype.py
@@ -2,6 +2,7 @@
 import pytest
 
 from pandas.compat import pa_version_under7p0
+from pandas.compat.pyarrow import pa_version_under12p0
 import pandas.util._test_decorators as td
 
 import pandas as pd
@@ -12,7 +13,6 @@
     date_range,
 )
 import pandas._testing as tm
-from pandas.compat.pyarrow import pa_version_under12p0
 from pandas.tests.copy_view.util import get_array
 
 

From 463ee1c1de76d0e7fcd36c7734ebb4606578bf37 Mon Sep 17 00:00:00 2001
From: Patrick Hoefler <61934744+phofl@users.noreply.github.com>
Date: Thu, 13 Jul 2023 15:20:56 -0500
Subject: [PATCH 3/3] Fix

---
 pandas/compat/pyarrow.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/pandas/compat/pyarrow.py b/pandas/compat/pyarrow.py
index 613e7f8e00912..96ca790e0efd3 100644
--- a/pandas/compat/pyarrow.py
+++ b/pandas/compat/pyarrow.py
@@ -21,3 +21,4 @@
     pa_version_under9p0 = True
     pa_version_under10p0 = True
     pa_version_under11p0 = True
+    pa_version_under12p0 = True