feat: Fix age display and test

src/tests/test_misc.py

@@ -0,0 +1,15 @@
+import datetime
+
+from fellchensammlung.tools.misc import age_as_hr_string
+from django.test import TestCase
+
+
+class AgeTest(TestCase):
+
+    def test_age_as_hr_string(self):
+        self.assertEqual("7 Wochen", age_as_hr_string(datetime.timedelta(days=50)))
+        self.assertEqual("3 Monate", age_as_hr_string(datetime.timedelta(days=100)))
+        self.assertEqual("10 Monate", age_as_hr_string(datetime.timedelta(days=300)))
+        self.assertEqual("1 Jahr und 4 Monate", age_as_hr_string(datetime.timedelta(days=500)))
+        self.assertEqual("1 Jahr und 11 Monate", age_as_hr_string(datetime.timedelta(days=700)))
+        self.assertEqual("2 Jahre und 6 Monate", age_as_hr_string(datetime.timedelta(days=900)))