public void GetRecommendedMovies_testuser_StarWarsRecommended()
{
new User("testuser");
MySqlCommands.RateMovie(12, "thumbsup"); // star wars movie
MySqlCommands.RateMovie(212, "thumbsup"); // star wars movie
MySqlCommands.RateMovie(73, "thumbsup"); // star wars movie
MySqlCommands.RateMovie(10, "thumbsup"); // fight club
MySqlCommands.RateMovie(13, "thumbsup"); // forrest gump
MySqlCommands.RateMovie(22, "thumbsup"); // se7en
Recommender.Update("genre", "directors", "actors");
Recommender.AlgorithmMovieWeight(MySqlCommands.FindMovieFromId(new List <int> {
20
}).ToList());
// given user data with these 6 movies for the movieid 20, Star Wars(1997)
// genre: action(0,5), adventure(0,5), fantasy(0,5), sci-fi(0,5)
// director: george lucas(0)
// actors: Mark(0,5), Harrison(0,5), Carrie(0,5), Peter C(0), Alec(0,1667), Anthony(0,3333), Kenny(0,1667), Peter M(0,3333), David(0,1667), Phil(0)
// total director = 0
// total actors = 0,5 + 0,5 + 0,5 + 0 + 0,1667 + 0,3333 + 0,1667 + 0,3333 + 0,1667 + 0 = 2,6667
// total genre = 0,5 + 0,5/4 + 0,5/4 + 0,5/4 = 0,875
// total weight = 0 + 2,6667 + 0,875 = 3,5417
KeyValuePair <MovieMenuItem, double> movie = Recommender.MovieRatingsWeight.First();
Assert.AreEqual(Math.Round(3.5417, 2), (Math.Round(movie.Value, 2))); // rounds down due to data is more preceise
}