public void testGetPreferencesForItem()
{
IPreferenceArray prefs = new GenericUserPreferenceArray(2);
long sampleUserID = 4;
prefs.SetUserID(0, sampleUserID);
long sampleItemID = 11;
prefs.SetItemID(0, sampleItemID);
prefs.SetUserID(1, sampleUserID);
long sampleItemID2 = 22;
prefs.SetItemID(1, sampleItemID2);
FastByIDMap <IPreferenceArray> delegatePreferences = new FastByIDMap <IPreferenceArray>();
delegatePreferences.Put(sampleUserID, prefs);
PlusAnonymousConcurrentUserDataModel instance = getTestableWithDelegateData(10, delegatePreferences);
long anonymousUserID = instance.TakeAvailableUser().Value;
IPreferenceArray tempPrefs = new GenericUserPreferenceArray(2);
tempPrefs.SetUserID(0, anonymousUserID);
tempPrefs.SetItemID(0, sampleItemID);
tempPrefs.SetUserID(1, anonymousUserID);
long sampleItemID3 = 33;
tempPrefs.SetItemID(1, sampleItemID3);
instance.SetTempPrefs(tempPrefs, anonymousUserID);
Assert.AreEqual(sampleUserID, instance.GetPreferencesForItem(sampleItemID).Get(0).GetUserID());
Assert.AreEqual(2, instance.GetPreferencesForItem(sampleItemID).Length());
Assert.AreEqual(1, instance.GetPreferencesForItem(sampleItemID2).Length());
Assert.AreEqual(1, instance.GetPreferencesForItem(sampleItemID3).Length());
Assert.AreEqual(2, instance.GetNumUsersWithPreferenceFor(sampleItemID));
Assert.AreEqual(1, instance.GetNumUsersWithPreferenceFor(sampleItemID, sampleItemID2));
Assert.AreEqual(1, instance.GetNumUsersWithPreferenceFor(sampleItemID, sampleItemID3));
}