fix #49 add new unit tests and fix old ones

tests/test_templatetags.py

@@ -8,52 +8,65 @@
 
 from schedule.templatetags.scheduletags import querystring_for_date, prev_url, next_url, create_event_url
 
+
 class TestTemplateTags(TestCase):
     def setUp(self):
         self.day = Day(events=Event.objects.all(),
-                       date=datetime.datetime(2008, 2, 7, 0, 0, tzinfo=pytz.utc))
-        rule = Rule(frequency="WEEKLY")
+                       date=datetime.datetime(datetime.datetime.now().year, 2, 7, 0, 0, tzinfo=pytz.utc))
+        self.day_out_of_limit = Day(events=Event.objects.all(),
+                       date=datetime.datetime(datetime.datetime.now().year + 3, 2, 7, 0, 0, tzinfo=pytz.utc))
+        self.day_out_of_limit_lower = Day(events=Event.objects.all(),
+                       date=datetime.datetime(datetime.datetime.now().year - 3, 2, 7, 0, 0, tzinfo=pytz.utc))
+
+        rule = Rule(frequency='WEEKLY')
         rule.save()
-        self.cal = Calendar(name="MyCal", slug="MyCalSlug")
+        self.cal = Calendar(name='MyCal', slug='MyCalSlug')
         self.cal.save()
+
         data = {
             'title': 'Recent Event',
-            'start': datetime.datetime(2008, 1, 5, 8, 0, tzinfo=pytz.utc),
-            'end': datetime.datetime(2008, 1, 5, 9, 0, tzinfo=pytz.utc),
-            'end_recurring_period': datetime.datetime(2008, 5, 5, 0, 0, tzinfo=pytz.utc),
+            'start': datetime.datetime(datetime.datetime.now().year, 1, 5, 8, 0, tzinfo=pytz.utc),
+            'end': datetime.datetime(datetime.datetime.now().year, 1, 5, 9, 0, tzinfo=pytz.utc),
+            'end_recurring_period': datetime.datetime(datetime.datetime.now().year, 5, 5, 0, 0, tzinfo=pytz.utc),
             'rule': rule,
             'calendar': self.cal,
         }
         recurring_event = Event(**data)
         recurring_event.save()
         self.period = Period(events=Event.objects.all(),
-                             start=datetime.datetime(2008, 1, 4, 7, 0, tzinfo=pytz.utc),
-                             end=datetime.datetime(2008, 1, 21, 7, 0, tzinfo=pytz.utc))
+                             start=datetime.datetime(datetime.datetime.now().year, 1, 4, 7, 0, tzinfo=pytz.utc),
+                             end=datetime.datetime(datetime.datetime.now().year, 1, 21, 7, 0, tzinfo=pytz.utc))
 
     def test_querystring_for_datetime(self):
-        date = datetime.datetime(2008, 1, 1, 0, 0, 0)
+        date = datetime.datetime(datetime.datetime.now().year, 1, 1, 0, 0, 0)
         query_string = querystring_for_date(date, autoescape=True)
-        self.assertEqual(escape("?year=2008&month=1&day=1&hour=0&minute=0&second=0"),
+        self.assertEqual(escape('?year={0}&month=1&day=1&hour=0&minute=0&second=0'.format(datetime.datetime.now().year)),
             query_string)
 
     def test_prev_url(self):
-        query_string = prev_url("month_calendar", 'MyCalSlug', self.day)
-        expected = ("/calendar/month/MyCalSlug/?year=2008&month=2&day=6&hour=0"
-                    "&minute=0&second=0")
-        self.assertEqual(query_string, escape(expected))
+        query_string = prev_url('month_calendar', self.cal, self.day)
+        url_params = escape('/calendar/month/MyCalSlug/?year={0}&month=2&day=6&hour=0&minute=0&second=0'.format(datetime.datetime.now().year))
+        expected = ('<a href="{0}"><span class="glyphicon glyphicon-circle-arrow-left" /></a>'.format(url_params))
+        self.assertEqual(query_string, expected)
 
     def test_next_url(self):
-        query_string = next_url("month_calendar", 'MyCalSlug', self.day)
-        expected = ("/calendar/month/MyCalSlug/?year=2008&month=2&day=8&hour=0"
-                    "&minute=0&second=0")
-        self.assertEqual(query_string, escape(expected))
+        query_string = next_url('month_calendar', self.cal, self.day)
+        url_params = escape('/calendar/month/MyCalSlug/?year={0}&month=2&day=8&hour=0&minute=0&second=0'.format(datetime.datetime.now().year))
+        expected = ('<a href="{0}"><span class="glyphicon glyphicon-circle-arrow-right" /></a>'.format(url_params))
+        self.assertEqual(query_string, expected)
+
+    def test_next_url_upper_limit(self):
+        query_string = next_url('month_calendar', self.cal, self.day_out_of_limit)
+        self.assertEqual(query_string, '')
+
+    def test_prev_url_lower_limit(self):
+        query_string = prev_url('month_calendar', self.cal, self.day_out_of_limit_lower)
+        self.assertEqual(query_string, '')
 
     def test_create_event_url(self):
         context = {}
-        slot = self.period.get_time_slot(datetime.datetime(2010, 1, 4, 7, 0, tzinfo=pytz.utc),
-                                         datetime.datetime(2008, 1, 4, 7, 12, tzinfo=pytz.utc))
+        slot = self.period.get_time_slot(datetime.datetime(datetime.datetime.now().year, 1, 4, 7, 0, tzinfo=pytz.utc),
+                                         datetime.datetime(datetime.datetime.now().year, 1, 4, 7, 12, tzinfo=pytz.utc))
         query_string = create_event_url(context, self.cal, slot.start)
-        expected = ("/event/create/MyCalSlug/?year=2010&month=1&day=4&hour=7"
-                    "&minute=0&second=0")
+        expected = ('/event/create/MyCalSlug/?year={0}&month=1&day=4&hour=7&minute=0&second=0'.format(datetime.datetime.now().year))
         self.assertEqual(query_string['create_event_url'], escape(expected))
-