public static void TestIdxOutBounds()
{
var array = new Eina.Array <int>();
array.Add(4);
Test.AssertRaises <ArgumentOutOfRangeException>(() => array.At(1));
Test.AssertRaises <ArgumentOutOfRangeException>(() => array.At(-1));
Test.AssertNotRaises <ArgumentOutOfRangeException>
(() => array.At(array.IndexOf(4)));
}