Very small test suite for the calendar module, mostly to check a constraint

on the return values from isleap().  Also checks firstweekday() and
setfirstweekday().

Lib/test/test_calendar.py

+import calendar
+import unittest
+
+from test_support import run_unittest
+
+
+class CalendarTestCase(unittest.TestCase):
+    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
+        # false (see SF bug #485794).  Specific additional tests may
+        # be appropriate; this tests a single "cycle".
+        self.assertEqual(calendar.isleap(2000), 1)
+        self.assertEqual(calendar.isleap(2001), 0)
+        self.assertEqual(calendar.isleap(2002), 0)
+        self.assertEqual(calendar.isleap(2003), 0)
+
+    def test_setfirstweekday(self):
+        self.assertRaises(ValueError, calendar.setfirstweekday, 'flabber')
+        self.assertRaises(ValueError, calendar.setfirstweekday, -1)
+        self.assertRaises(ValueError, calendar.setfirstweekday, 200)
+        orig = calendar.firstweekday()
+        calendar.setfirstweekday(calendar.SUNDAY)
+        self.assertEqual(calendar.firstweekday(), calendar.SUNDAY)
+        calendar.setfirstweekday(calendar.MONDAY)
+        self.assertEqual(calendar.firstweekday(), calendar.MONDAY)
+        calendar.setfirstweekday(orig)
+
+
+def test_main():
+    run_unittest(CalendarTestCase)
+
+if __name__ == "__main__":
+    test_main()