From 0aea21036bda42718a842db0848dfe6a81c16b63 Mon Sep 17 00:00:00 2001
From: cmp0xff <cmp0xff@gmail.com>
Date: Thu, 20 Nov 2025 13:11:53 +0100
Subject: [PATCH 1/3] pandas-dev/pandas#54252 np.longlong can be tested on
 non-linux platforms

---
 tests/__init__.py           |  6 +++---
 tests/series/test_series.py | 16 +++++++++-------
 2 files changed, 12 insertions(+), 10 deletions(-)

diff --git a/tests/__init__.py b/tests/__init__.py
index 701e1757d..956f3e5c1 100644
--- a/tests/__init__.py
+++ b/tests/__init__.py
@@ -5,8 +5,7 @@
     nullcontext,
     suppress,
 )
-import os
-import platform
+import sys
 from typing import (
     TYPE_CHECKING,
     Final,
@@ -94,7 +93,8 @@
     np_ndarray_td: TypeAlias = npt.NDArray[np.timedelta64]
 
 TYPE_CHECKING_INVALID_USAGE: Final = TYPE_CHECKING
-WINDOWS = os.name == "nt" or "cygwin" in platform.system().lower()
+LINUX = sys.platform == "linux"
+WINDOWS = sys.platform in {"win32", "cygwin"}
 PD_LTE_23 = Version(pd.__version__) < Version("2.3.999")
 NUMPY20 = np.lib.NumpyVersion(np.__version__) >= "2.0.0"
 
diff --git a/tests/series/test_series.py b/tests/series/test_series.py
index 7b0cb0615..ca7c71546 100644
--- a/tests/series/test_series.py
+++ b/tests/series/test_series.py
@@ -54,6 +54,7 @@
 from pandas.core.dtypes.dtypes import CategoricalDtype  # noqa F401
 
 from tests import (
+    LINUX,
     PD_LTE_23,
     TYPE_CHECKING_INVALID_USAGE,
     WINDOWS,
@@ -2624,13 +2625,14 @@ def test_astype_bool(cast_arg: BooleanDtypeArg, target_type: type) -> None:
 def test_astype_int(cast_arg: IntDtypeArg, target_type: type) -> None:
     s = pd.Series([1, 2, 3])
 
-    if cast_arg in (np.longlong, "longlong", "q"):
-        pytest.skip(
-            "longlong is bugged, for details, see"
-            "https://github.com/pandas-dev/pandas/issues/54252"
-        )
-
-    check(s.astype(cast_arg), pd.Series, target_type)
+    s_astype = s.astype(cast_arg)
+    if LINUX and cast_arg in (np.longlong, "longlong", "q"):
+        # TODO: pandas-dev/pandas#54252 longlong is bugged in Linux
+        msg = rf"Expected type '{type(cast_arg)}' but got '{type(s_astype.iloc[0])}'"
+        with pytest.raises(RuntimeError, match=msg):
+            check(s_astype, pd.Series, target_type)
+    else:
+        check(s_astype, pd.Series, target_type)
 
     if TYPE_CHECKING:
         # python int

From 4146c2116b20eb42b06eda7cf72c4e024a31d6c0 Mon Sep 17 00:00:00 2001
From: cmp0xff <cmp0xff@gmail.com>
Date: Thu, 20 Nov 2025 13:20:21 +0100
Subject: [PATCH 2/3] also bugged on Mac

---
 tests/__init__.py           | 1 +
 tests/series/test_series.py | 7 ++++---
 2 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/tests/__init__.py b/tests/__init__.py
index 956f3e5c1..9227202f5 100644
--- a/tests/__init__.py
+++ b/tests/__init__.py
@@ -95,6 +95,7 @@
 TYPE_CHECKING_INVALID_USAGE: Final = TYPE_CHECKING
 LINUX = sys.platform == "linux"
 WINDOWS = sys.platform in {"win32", "cygwin"}
+MAC = sys.platform == "darwin"
 PD_LTE_23 = Version(pd.__version__) < Version("2.3.999")
 NUMPY20 = np.lib.NumpyVersion(np.__version__) >= "2.0.0"
 
diff --git a/tests/series/test_series.py b/tests/series/test_series.py
index ca7c71546..b00a28623 100644
--- a/tests/series/test_series.py
+++ b/tests/series/test_series.py
@@ -55,6 +55,7 @@
 
 from tests import (
     LINUX,
+    MAC,
     PD_LTE_23,
     TYPE_CHECKING_INVALID_USAGE,
     WINDOWS,
@@ -2626,9 +2627,9 @@ def test_astype_int(cast_arg: IntDtypeArg, target_type: type) -> None:
     s = pd.Series([1, 2, 3])
 
     s_astype = s.astype(cast_arg)
-    if LINUX and cast_arg in (np.longlong, "longlong", "q"):
-        # TODO: pandas-dev/pandas#54252 longlong is bugged in Linux
-        msg = rf"Expected type '{type(cast_arg)}' but got '{type(s_astype.iloc[0])}'"
+    if (LINUX or MAC) and cast_arg in {np.longlong, "longlong", "q"}:
+        # TODO: pandas-dev/pandas#54252 longlong is bugged on Linux and Mac
+        msg = rf"Expected type '{cast_arg}' but got '{type(s_astype.iloc[0])}'"
         with pytest.raises(RuntimeError, match=msg):
             check(s_astype, pd.Series, target_type)
     else:

From 4720e8fd96cafbe10c25946d9b808fe0b3557854 Mon Sep 17 00:00:00 2001
From: cmp0xff <cmp0xff@gmail.com>
Date: Thu, 20 Nov 2025 13:26:39 +0100
Subject: [PATCH 3/3] fix error message

---
 tests/series/test_series.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tests/series/test_series.py b/tests/series/test_series.py
index b00a28623..c405aa222 100644
--- a/tests/series/test_series.py
+++ b/tests/series/test_series.py
@@ -2629,7 +2629,7 @@ def test_astype_int(cast_arg: IntDtypeArg, target_type: type) -> None:
     s_astype = s.astype(cast_arg)
     if (LINUX or MAC) and cast_arg in {np.longlong, "longlong", "q"}:
         # TODO: pandas-dev/pandas#54252 longlong is bugged on Linux and Mac
-        msg = rf"Expected type '{cast_arg}' but got '{type(s_astype.iloc[0])}'"
+        msg = rf"Expected type '{target_type}' but got '{type(s_astype.iloc[0])}'"
         with pytest.raises(RuntimeError, match=msg):
             check(s_astype, pd.Series, target_type)
     else: