public void ExpandTest()
        {
            var arr = UnsafeStack.Allocate <int>(8);

            for (int i = 0; i < 10; i++)
            {
                UnsafeStack.Push(arr, i);
            }

            Assert.IsTrue(UnsafeStack.GetCapacity(arr) > 8);

            UnsafeStack.Free(arr);
        }