def test_set_recipe_popularity(self):
recipe = TestRecipe()
for i in range(3):
TestRating(recipe=recipe, vote=True)
expected_rating = Decimal(wilson_score_interval(3, 0)).quantize(Decimal(".0001"))
recipe = Recipe.objects.get(id=recipe.id)
self.assertEqual(expected_rating, recipe.popularity)
# only sets popularity for ratings stored in the db
rating = Rating(recipe=recipe, rated_by=TestUser(), vote=False)
rating.set_recipe_popularity()
recipe = Recipe.objects.get(id=recipe.id)
self.assertEqual(expected_rating, recipe.popularity)
# default case, and no error/change when calling twice on same
# unchanged rating
rating.save()
rating.set_recipe_popularity()
new_rating = Decimal(wilson_score_interval(3, 1)).quantize(Decimal(".0001"))
recipe = Recipe.objects.get(id=recipe.id)
self.assertNotEqual(expected_rating, new_rating)
self.assertEqual(new_rating, recipe.popularity)
rating.set_recipe_popularity()
recipe = Recipe.objects.get(id=recipe.id)
self.assertEqual(new_rating, recipe.popularity)
def test_save(self):
recipe = TestRecipe()
self.assertEqual(0, recipe.popularity)
for i in range(1, 5):
TestRating(recipe=recipe, vote=True)
recipe = Recipe.objects.get(id=recipe.id)
wsi = wilson_score_interval(i, 0)
self.assertEqual(Decimal(wsi).quantize(Decimal(".0001")), recipe.popularity)
for i in range(1, 5):
TestRating(recipe=recipe, vote=False)
recipe = Recipe.objects.get(id=recipe.id)
wsi = wilson_score_interval(4, i)
self.assertEqual(Decimal(wsi).quantize(Decimal(".0001")), recipe.popularity)
def set_recipe_popularity(self):
""" Updates the popularity on self.recipe based on the newest vote """
ratings = Rating.objects.filter(recipe=self.recipe)
ups = ratings.filter(vote=True).count()
downs = ratings.filter(vote=False).count()
self.recipe.popularity = str(wilson_score_interval(ups, downs))
self.recipe.likes = ups
self.recipe.dislikes = downs
self.recipe.save()
