public void Should_Return_Zero_Euclidean_Distance_When_Entities_Have_No_Preferences_In_Common()
{
const string entity1 = "Lisa Rose";
const string entity2 = "Gene Seymour";
var entity1Preferences = new Dictionary <string, double>
{
{ "Lady in the Water", 2.5 },
{ "Snakes on a Plane", 3.5 },
{ "Just My Luck", 3.0 }
};
var entity2Preferences = new Dictionary <string, double>
{
{ "Superman Returns", 5 },
{ "You, Me and Dupree", 3.5 },
{ "The Night Listener", 3.0 }
};
var preferences = new Dictionary <string, Dictionary <string, double> >
{
{ entity1, entity1Preferences },
{ entity2, entity2Preferences }
};
var sim = new Similarity <string, string>();
var result = sim.GetSimilarityByEuclideanDistance(preferences, entity1, entity2);
Assert.AreEqual(result, 0);
}