public void SetCurrentPosition_throws_exception_if_outside_bounds()
{
GridNavigator navigator = new GridNavigator(10, 10);
Assert.Throws <ArgumentOutOfRangeException>(() => { navigator.SetCurrentPosition(-1, -1); });
Assert.Throws <ArgumentOutOfRangeException>(() => navigator.SetCurrentPosition(11, 0));
Assert.Throws <ArgumentOutOfRangeException>(() => navigator.SetCurrentPosition(0, 11));
}
// We need local copy of GridNavigator for each call of recursive func
private GridNavigator GetGridNavigator(int x, int y)
{
var result = new GridNavigator(_cells.GetLength(0), _cells.GetLength(1));
result.SetCurrentPosition(x, y);
return(result);
}
public void SetCurrentPosition_sets_position()
{
GridNavigator navigator = new GridNavigator(10, 10);
navigator.SetCurrentPosition(1, 2);
Assert.AreEqual(new Cell(1, 2), navigator.CurrentPosition);
}
public void Neighbours_for_corner_cell_returns_only_available_neighbours()
{
GridNavigator navigator = new GridNavigator(10, 10);
navigator.SetCurrentPosition(0, 0);
Assert.AreEqual(2, navigator.Neighbours.Count);
Assert.AreEqual(new Cell(1, 0), navigator.Neighbours[Direction.Right]);
Assert.AreEqual(new Cell(0, 1), navigator.Neighbours[Direction.Down]);
}
public void Neighbours_returns_all_neighbour_cells()
{
GridNavigator navigator = new GridNavigator(10, 10);
navigator.SetCurrentPosition(5, 5);
Assert.AreEqual(new Cell(4, 5), navigator.Neighbours[Direction.Left]);
Assert.AreEqual(new Cell(6, 5), navigator.Neighbours[Direction.Right]);
Assert.AreEqual(new Cell(5, 6), navigator.Neighbours[Direction.Down]);
Assert.AreEqual(new Cell(5, 4), navigator.Neighbours[Direction.Up]);
}