public void GoingOffTheGridToTheTopWrapsToTheBottom()
{
var grid = Substitute.For<IGrid>();
var navigator = new Navigator(grid);
grid.Width.Returns(5);
grid.Height.Returns(5);
var pos = navigator.Wrap(new Position(2, 5));
Assert.Equal(new Position(2, 0), pos);
}
public void GoingOffTheGridToTheRightWrapsToTheLeft()
{
var grid = Substitute.For<IGrid>();
var navigator = new Navigator(grid);
grid.Width.Returns(5);
grid.Height.Returns(5);
var pos = navigator.Wrap(new Position(6, 2));
Assert.Equal(new Position(1, 2), pos);
}