public void FalsePredicateNeverAdds()
{
Func <ICollection <int>, int, bool> falsePredicate = (list, item) => false;
var selectiveList = new SelectiveList <int>(falsePredicate);
selectiveList.Add(5);
Assert.IsEmpty(selectiveList);
}
public void TruePredicateAdds()
{
Func <ICollection <int>, int, bool> truePredicate = (list, item) => true;
var selectiveList = new SelectiveList <int>(truePredicate);
selectiveList.Add(5);
Assert.AreEqual(5, selectiveList.FirstOrDefault());
Assert.AreEqual(1, selectiveList.Count);
}
public void ListPassedToPredicateIsSameListDifferentInstance()
{
ICollection <int> predicateList = null;
Func <ICollection <int>, int, bool> truePredicate = (list, item) =>
{
predicateList = list;
return(true);
};
var selectiveList = new SelectiveList <int>(truePredicate);
selectiveList.Add(5);
selectiveList.Add(6);
Assert.False(selectiveList == predicateList);
CollectionAssert.AreEqual(selectiveList, predicateList);
}
