public void ImmutableGame_Shift_CreateNewImmutableGameCorrectly()
{
FifteenImmutable.ImmutableGame game = new FifteenImmutable.ImmutableGame(1, 2, 3, 0);
game = game.Shift(2);
FifteenImmutable.Location resultCoordinatesOfZero = game.GetLocation(0);
int shiftedTile = game[1, 1];
Assert.AreEqual(2, shiftedTile);
Assert.AreEqual(0, resultCoordinatesOfZero.X);
Assert.AreEqual(1, resultCoordinatesOfZero.Y);
}
public void ImmutableGame_Should_BeImmutable()
{
FifteenImmutable.ImmutableGame game = new FifteenImmutable.ImmutableGame(1, 2, 3, 0);
game.Shift(2);
FifteenImmutable.Location resultCoordinatesOfZero = game.GetLocation(0);
int shiftedTile = game[0, 1];
Assert.AreEqual(2, shiftedTile);
Assert.AreEqual(1, resultCoordinatesOfZero.X);
Assert.AreEqual(1, resultCoordinatesOfZero.Y);
}