public void Translate()
{
var pos = new GridPos(5, 6);
var trn = pos.Translate(7, 8);
Assert.Multiple(() =>
{
Assert.AreEqual(5, pos.X);
Assert.AreEqual(6, pos.Y);
Assert.AreEqual(12, trn.X);
Assert.AreEqual(14, trn.Y);
Assert.That(!ReferenceEquals(pos, trn));
});
}