| public Add ( int user_id, int item_id, byte rating ) : void | ||
| user_id | int | |
| item_id | int | |
| rating | byte | |
| return | void | |
public void TestFull()
{
var ratings = new StaticByteRatings(2);
Assert.AreEqual(0, ratings.Count);
ratings.Add(1, 4, 3);
Assert.AreEqual(1, ratings.Count);
ratings.Add(1, 8, 2);
Assert.AreEqual(2, ratings.Count);
ratings.Add(2, 4, 2);
}
/// <summary>Read in rating data from a TextReader</summary>
/// <param name="reader">the <see cref="StreamReader"/> to read from</param>
/// <returns>the rating data</returns>
static public IRatings Read(StreamReader reader)
{
// create ratings data structure
IRatings ratings = new StaticByteRatings(GetNumberOfRatings(reader));
// read in ratings
string line;
while ( (line = reader.ReadLine()) != null )
{
string[] tokens = line.Split('|');
int user_id = int.Parse(tokens[0]);
int num_user_ratings = int.Parse(tokens[1]); // number of ratings for this user
for (int i = 0; i < num_user_ratings; i++)
{
line = reader.ReadLine();
tokens = line.Split('\t');
int item_id = int.Parse(tokens[0]);
byte rating = byte.Parse(tokens[1]);
ratings.Add(user_id, item_id, rating);
}
}
return ratings;
}
[Test()] public void TestMaxUserIDMaxItemID()
{
var ratings = new StaticByteRatings(7);
ratings.Add(1, 4, 3);
ratings.Add(1, 8, 2);
ratings.Add(2, 4, 2);
ratings.Add(2, 2, 6);
ratings.Add(2, 5, 4);
ratings.Add(3, 7, 2);
ratings.Add(6, 3, 3);
Assert.AreEqual(6, ratings.MaxUserID);
Assert.AreEqual(8, ratings.MaxItemID);
}
[Test()] public void TestMinRatingMaxRating()
{
var ratings = new StaticByteRatings(7);
ratings.Add(1, 4, 3);
ratings.Add(1, 8, 2);
ratings.Add(2, 4, 2);
ratings.Add(2, 2, 6);
ratings.Add(2, 5, 4);
ratings.Add(3, 7, 2);
ratings.Add(6, 3, 3);
Assert.AreEqual(6, ratings.Scale.Max);
Assert.AreEqual(2, ratings.Scale.Min);
}
[Test()] public void TestAdd()
{
var ratings = new StaticByteRatings(7);
ratings.Add(1, 4, 3);
Assert.AreEqual(1, ratings.Count);
ratings.Add(1, 8, 2);
Assert.AreEqual(2, ratings.Count);
ratings.Add(2, 4, 2);
ratings.Add(2, 2, 6);
ratings.Add(2, 5, 4);
ratings.Add(3, 7, 2);
ratings.Add(6, 3, 3);
Assert.AreEqual(4, ratings[2, 5]);
Assert.AreEqual(3, ratings[1, 4]);
Assert.AreEqual(3, ratings[6, 3]);
Assert.AreEqual(7, ratings.Count);
}
public void TestAddRating()
{
var ratings = new StaticByteRatings(7);
ratings.Add(1, 4, 3);
Assert.AreEqual(1, ratings.Count);
ratings.Add(1, 8, 2);
Assert.AreEqual(2, ratings.Count);
ratings.Add(2, 4, 2);
ratings.Add(2, 2, 6);
ratings.Add(2, 5, 4);
ratings.Add(3, 7, 2);
ratings.Add(6, 3, 3);
Assert.AreEqual(4, ratings.Get(2, 5));
Assert.AreEqual(3, ratings.Get(1, 4));
Assert.AreEqual(3, ratings.Get(6, 3));
Assert.AreEqual(7, ratings.Count);
}
public void TestRemoveAt()
{
var ratings = new StaticByteRatings(8);
ratings.Add(1, 4, 3);
ratings.Add(1, 8, 2);
ratings.Add(2, 4, 2);
ratings.Add(2, 2, 6);
ratings.Add(2, 5, 4);
ratings.Add(3, 7, 2);
ratings.Add(3, 3, 3);
ratings.Add(6, 3, 3);
Assert.AreEqual(8, ratings.Count);
ratings.RemoveAt(ratings.GetIndex(2, 5));
}
[Test()] public void TestIndex()
{
var ratings = new StaticByteRatings(8);
ratings.Add(1, 4, 3);
ratings.Add(1, 8, 2);
ratings.Add(2, 4, 2);
ratings.Add(2, 2, 6);
ratings.Add(2, 5, 4);
ratings.Add(3, 4, 2);
ratings.Add(3, 3, 3);
ratings.Add(6, 3, 3);
// test index[,]
Assert.AreEqual(3, ratings[1, 4]);
Assert.AreEqual(2, ratings[1, 8]);
Assert.AreEqual(6, ratings[2, 2]);
}
public void TestRemoveItem()
{
var ratings = new StaticByteRatings(7);
ratings.Add(1, 4, 3);
ratings.Add(1, 8, 2);
ratings.Add(2, 4, 2);
ratings.Add(2, 2, 6);
ratings.Add(2, 5, 4);
ratings.Add(3, 4, 2);
ratings.Add(3, 3, 3);
Assert.AreEqual(7, ratings.Count);
ratings.RemoveItem(4);
}
