public void Test()
{
const int blockCount = 10;
const int elemPerItem = 5;
var itemsPerBlock = ExpandableArray <int> .ComputeItemsPerBlock(sizeof(int));
var x = new ExpandableArray <int>(elemPerItem, sizeof(int));
Assert.AreEqual(itemsPerBlock, x.ElementsPerBlock / elemPerItem);
Assert.AreEqual(0, x.GetLocalIndex(0));
Assert.AreEqual(1, x.GetLocalIndex(1));
Assert.AreEqual(x.ElementsPerBlock - 1, x.GetLocalIndex(x.ElementsPerBlock - 1));
Assert.AreEqual(0, x.GetLocalIndex(x.ElementsPerBlock));
Assert.AreEqual(0, x.GetLocalIndex(itemsPerBlock * elemPerItem));
Assert.AreEqual(0, x.GetLocalIndex(itemsPerBlock * blockCount * elemPerItem));
Assert.AreEqual(2, x.GetLocalIndex(itemsPerBlock * blockCount * elemPerItem + 2));
Assert.AreEqual(x.ElementsPerBlock - 1, x.GetLocalIndex(itemsPerBlock * blockCount * elemPerItem + x.ElementsPerBlock - 1));
x.EnsureCapacity(itemsPerBlock * blockCount * elemPerItem + 1);
var realBlockCount = x.EnumerateBlocks().Count();
Assert.IsTrue(realBlockCount == 1 + blockCount + x.BlockCountIncrement);
}
