Allow drawing once every day

The duration between two draws is controlled by settings.DRAW_TIME

words/tests.py

@@ -1,7 +1,9 @@
 from datetime import timedelta
+from django.conf import settings
 from django.contrib.auth.models import User
 from django.core.exceptions import ValidationError
 from django.utils import timezone
+from django.utils.dateparse import parse_duration
 from django.utils.translation import activate
 from django.test import TestCase
 
@@ -80,6 +82,8 @@ class DrawTest(TestCase):
                             accepted=None)
         self.assertEquals(self.word, self.user.draw_word())
         draw.accepted = True
+        duration = parse_duration(settings.DRAW_TIME)
+        draw.timestamp -= 2 * duration
         draw.save()
         Work.objects.create(draw=draw)
 
@@ -91,6 +95,7 @@ class DrawTest(TestCase):
         self.assertIsNone(draw.accepted)
 
         draw.accepted = True
+        draw.timestamp -= 2 * duration
         draw.save()
         Work.objects.create(draw=draw)
 
@@ -110,3 +115,12 @@ class DrawTest(TestCase):
         Work.objects.create(draw=draw)
 
         self.assertEquals(word, self.user.last_draw().word)
+
+    def test_draw_per_day(self):
+        draw = Draw.objects.create(user=self.user,
+                                   word=self.word,
+                                   accepted=True)
+        Work.objects.create(draw=draw)
+        Word.objects.create()
+
+        self.assertEquals(self.word, self.user.draw_word())