public void TileList_should_throw_on_invalid_move_on_vertical_axis()
{
var tiles = new List <Tile>
{
new EmptyTile {
Location = new Location(0, 0)
},
new NumberTile {
Location = new Location(1, 0), Value = 2
}
};
var sut = new TileList(Axis.Vertical, tiles);
sut.Invoking(a => a.CanMoveTowardsZero(Direction.East))
.Should().Throw <ArgumentException>();
sut.Invoking(a => a.CanMoveTowardsZero(Direction.West))
.Should().Throw <ArgumentException>();
}