Add negative example

Author: Fokko

bindings/python/tests/test_transform.py

@@ -90,9 +90,15 @@ def test_day_transform():
 
 
 def test_hour_transform():
-    arr = pa.array([datetime(1970, 1, 1, 19, 1, 23), datetime(2000, 3, 1, 12, 1, 23)])
+    arr = pa.array(
+        [
+            datetime(1970, 1, 1, 19, 1, 23),
+            datetime(2000, 3, 1, 12, 1, 23),
+            datetime(22, 5, 1, 22, 1, 1),  # Negative
+        ]
+    )
     result = transform.hour(arr)
-    expected = pa.array([19, 264420], type=pa.int32())
+    expected = pa.array([19, 264420, -17072906], type=pa.int32())
     assert result == expected