1 files changed, 51 insertions, 1 deletions
diff --git a/Lib/test/test_calendar.py b/Lib/test/test_calendar.py
index a4839a6..f2969e2 100644
--- a/Lib/test/test_calendar.py
+++ b/Lib/test/test_calendar.py
@@ -396,12 +396,62 @@ class SundayTestCase(MonthCalendarTestCase):
         self.check_weeks(1995, 12, (2, 7, 7, 7, 7, 1))
 
 
+class MonthRangeTestCase(unittest.TestCase):
+    def test_january(self):
+        # Tests valid lower boundary case.
+        self.assertEqual(calendar.monthrange(2004,1), (3,31))
+
+    def test_february_leap(self):
+        # Tests February during leap year.
+        self.assertEqual(calendar.monthrange(2004,2), (6,29))
+
+    def test_february_nonleap(self):
+        # Tests February in non-leap year.
+        self.assertEqual(calendar.monthrange(2010,2), (0,28))
+
+    def test_december(self):
+        # Tests valid upper boundary case.
+        self.assertEqual(calendar.monthrange(2004,12), (2,31))
+
+    def test_zeroth_month(self):
+        # Tests low invalid boundary case.
+        with self.assertRaises(calendar.IllegalMonthError):
+            calendar.monthrange(2004, 0)
+
+    def test_thirteenth_month(self):
+        # Tests high invalid boundary case.
+        with self.assertRaises(calendar.IllegalMonthError):
+            calendar.monthrange(2004, 13)
+
+class LeapdaysTestCase(unittest.TestCase):
+    def test_no_range(self):
+        # test when no range i.e. two identical years as args
+        self.assertEqual(calendar.leapdays(2010,2010), 0)
+
+    def test_no_leapdays(self):
+        # test when no leap years in range
+        self.assertEqual(calendar.leapdays(2010,2011), 0)
+
+    def test_no_leapdays_upper_boundary(self):
+        # test no leap years in range, when upper boundary is a leap year
+        self.assertEqual(calendar.leapdays(2010,2012), 0)
+
+    def test_one_leapday_lower_boundary(self):
+        # test when one leap year in range, lower boundary is leap year
+        self.assertEqual(calendar.leapdays(2012,2013), 1)
+
+    def test_several_leapyears_in_range(self):
+        self.assertEqual(calendar.leapdays(1997,2020), 5)
+
+
 def test_main():
     support.run_unittest(
         OutputTestCase,
         CalendarTestCase,
         MondayTestCase,
-        SundayTestCase
+        SundayTestCase,
+        MonthRangeTestCase,
+        LeapdaysTestCase,
     )