public void ICollectionOptimization()
{
var source = new NonEnumerableCollection<string> { "hello", "there" };
// If ToList just iterated over the list, this would throw
var list = source.ToList();
list.AssertSequenceEqual("hello", "there");
}
public void CountOptimization()
{
// The counts are different, so we don't need to iterate
var first = new NonEnumerableCollection<int> { 1, 2, 3 };
var second = new NonEnumerableCollection<int> { 1, 2 };
Assert.IsFalse(first.SequenceEqual(second));
}
//[Ignore("LINQ to Objects doesn't optimize by count")]
public void CountOptimization()
{
// The counts are different, so we don't need to iterate
var first = new NonEnumerableCollection <int> {
1, 2, 3
};
var second = new NonEnumerableCollection <int> {
1, 2
};
Assert.IsFalse(first.SequenceEqual(second));
}
public void OvershootIndexOnCollection()
{
IEnumerable<int> source = new NonEnumerableCollection<int> { 90, 91, 92 };
Assert.Throws<ArgumentOutOfRangeException>(() => source.ElementAt(3));
}
public void OvershootIndexOnCollection()
{
IEnumerableWithCount<int> source = new NonEnumerableCollection<int> { 90, 91, 92 };
Assert.AreEqual(0, source.ElementAtOrDefault(3));
}