def test_movie_without_likes_is_not_recommended(service, movies_repo):
user = User('root')
movie_a = Movie('a')
movie_b = Movie('b')
movies_repo.store(movie_a)
movies_repo.store(movie_b)
user.add_to_liked_movies(movie_b)
result = service.recommend(user)
assert_recommendations(result, [])
def test_liked_movie_is_not_included(service, movies_repo):
user = User('root')
other = User('other')
movie_a = Movie('a')
movie_b = Movie('b')
movies_repo.store(movie_a)
movies_repo.store(movie_b)
user.add_to_liked_movies(movie_a)
other.add_to_liked_movies(movie_b)
result = service.recommend(user)
assert_recommendations(result, [movie_b])
def test_followed_users_movie_is_more_influential(service, movies_repo):
user = User('root')
other_user = User('other')
followed_user = User('followed')
movie_a = Movie('a')
movie_b = Movie('b')
movies_repo.store(movie_a)
movies_repo.store(movie_b)
user.add_to_followed_users(followed_user)
followed_user.add_to_liked_movies(movie_a)
other_user.add_to_liked_movies(movie_b)
result = service.recommend(user)
assert_recommendations(result, [movie_a, movie_b])
def test_nested_follows_are_more_influential(service, movies_repo):
movie_a = Movie('a')
movie_b = Movie('b')
movies_repo.store(movie_b)
movies_repo.store(movie_a)
user = User('root')
followed_user_1 = User('followed 1')
followed_user_2 = User('followed 2')
user.add_to_followed_users(followed_user_1)
user.add_to_followed_users(followed_user_2)
followed_user_2.add_to_followed_users(followed_user_1)
followed_user_1.add_to_liked_movies(movie_a)
followed_user_2.add_to_liked_movies(movie_b)
result = service.recommend(user)
assert_recommendations(result, [movie_a, movie_b])
def test_globally_liked_movies_are_more_influential(service, movies_repo):
user = User('root')
movie_a = Movie('a')
movie_b = Movie('b')
movie_c = Movie('c')
movies_repo.store(movie_a)
movies_repo.store(movie_b)
movies_repo.store(movie_c)
user_a = User('a')
user_b = User('b')
user_a.add_to_liked_movies(movie_a)
user_a.add_to_liked_movies(movie_b)
user_b.add_to_liked_movies(movie_b)
result = service.recommend(user)
assert_recommendations(result, [movie_b, movie_a])
def test_similar_users_are_more_influential(service, movies_repo):
movie_a = Movie('a')
movie_b = Movie('b')
movie_c = Movie('c')
movies_repo.store(movie_a)
movies_repo.store(movie_b)
movies_repo.store(movie_c)
user = User('root')
followed_user_1 = User('followed 1')
followed_user_2 = User('followed 2')
user.add_to_followed_users(followed_user_1)
user.add_to_followed_users(followed_user_2)
followed_user_1.add_to_liked_movies(movie_a)
followed_user_2.add_to_liked_movies(movie_b)
followed_user_2.add_to_liked_movies(movie_c)
# User shares a common movie with followed_user_2
user.add_to_liked_movies(movie_c)
result = service.recommend(user)
assert_recommendations(result, [movie_b, movie_a])