public void RemoveAt_Exception_IndexIsEqualToCount()
{
PageVirtualizingList<int> list = new PageVirtualizingList<int>();
list.UpdateCount(20, 6);
Assert.ThrowsException<ArgumentOutOfRangeException>(() => list.RemoveAt(20));
}
public void RemoveAt_RemovesItemFromList()
{
PageVirtualizingList<int> list = new PageVirtualizingList<int>();
list.UpdateCount(20, 6);
list[2] = 8;
list[5] = 10;
list[10] = 42;
list.RemoveAt(5);
Assert.AreEqual(19, list.Count);
Assert.AreEqual(8, list[2]);
Assert.AreEqual(42, list[9]);
}