Add testing of Day sorting.

diff --git a/tests/test_days.py b/tests/test_days.py
index 7805208e749a664a655b97103ab3705799e062b1..02f72af140dd13cbc189af14ade4b856cf1a4c63 100644 (file)
--- a/tests/test_days.py
+++ b/tests/test_days.py
@@ -22,6 +22,14 @@ class DayTests(TestCase):
             Day('2024-02-01 23:00:00')
         self.assertEqual(datetime(2024, 1, 1), Day('2024-01-01').datetime)
 
+    def test_Day_sorting(self):
+        """Test Day.__lt__."""
+        day1 = Day('2024-01-01')
+        day2 = Day('2024-01-02')
+        day3 = Day('2024-01-03')
+        days = [day3, day1, day2]
+        self.assertEqual(sorted(days), [day1, day2, day3])
+
     def test_Day_weekday(self):
         """Test Day.weekday."""
         self.assertEqual(Day('2024-03-17').weekday, 'Sunday')