Day rule and accompanying tests

Signed-off-by: Jasper Berghoef <jasper.berghoef@gmail.com>

tests/factories/segment.py

@@ -16,18 +16,26 @@ class SegmentFactory(factory.DjangoModelFactory):
 
 
 class TimeRuleFactory(factory.DjangoModelFactory):
-    start_time = datetime.time(8,0,0)
-    end_time = datetime.time(23,0,0)
+    start_time = datetime.time(8, 0, 0)
+    end_time = datetime.time(23, 0, 0)
 
     class Meta:
         model = models.TimeRule
 
+
+class DayRuleFactory(factory.DjangoModelFactory):
+
+    class Meta:
+        model = models.DayRule
+
+
 class ReferralRuleFactory(factory.DjangoModelFactory):
     regex_string = "test.test"
 
     class Meta:
         model = models.ReferralRule
 
+
 class VisitCountRuleFactory(factory.DjangoModelFactory):
     operator = "more_than"
     count = 0