Update test_calendar.py from CPython v3.12.0

Author: Blues-star

Lib/test/test_calendar.py

@@ -8,6 +8,7 @@
 import sys
 import datetime
 import os
+import warnings
 
 # From https://en.wikipedia.org/wiki/Leap_year_starting_on_Saturday
 result_0_02_text = """\
@@ -490,6 +491,14 @@ def test_format(self):
             self.assertEqual(out.getvalue().strip(), "1   2   3")
 
 class CalendarTestCase(unittest.TestCase):
+
+    def test_deprecation_warning(self):
+        with self.assertWarnsRegex(
+            DeprecationWarning,
+            "The 'January' attribute is deprecated, use 'JANUARY' instead"
+        ):
+            calendar.January
+
     def test_isleap(self):
         # Make sure that the return is right for a few years, and
         # ensure that the return values are 1 or 0, not just true or
@@ -568,11 +577,15 @@ def test_locale_calendar_formatweekday(self):
         try:
             # formatweekday uses different day names based on the available width.
             cal = calendar.LocaleTextCalendar(locale='en_US')
+            # For really short widths, the abbreviated name is truncated.
+            self.assertEqual(cal.formatweekday(0, 1), "M")
+            self.assertEqual(cal.formatweekday(0, 2), "Mo")
             # For short widths, a centered, abbreviated name is used.
+            self.assertEqual(cal.formatweekday(0, 3), "Mon")
             self.assertEqual(cal.formatweekday(0, 5), " Mon ")
-            # For really short widths, even the abbreviated name is truncated.
-            self.assertEqual(cal.formatweekday(0, 2), "Mo")
+            self.assertEqual(cal.formatweekday(0, 8), "  Mon   ")
             # For long widths, the full day name is used.
+            self.assertEqual(cal.formatweekday(0, 9), "  Monday ")
             self.assertEqual(cal.formatweekday(0, 10), "  Monday  ")
         except locale.Error:
             raise unittest.SkipTest('cannot set the en_US locale')