public void SideHas9Squares(Side side)
{
var squares = MovablePosition.GetMovablePositionsForSide(side);
Assert.Equal(8, squares.Length);
// Center
Assert.Equal(0, squares.Count(MovablePosition.IsCenter));
// Edges
MovablePosition[] edges = squares.Where(MovablePosition.IsEdge).ToArray();
Assert.Equal(4, edges.Length);
var adjacents = CubeGeometry.GetClockwiseAdjacentFaces(side);
foreach (var adjacent in adjacents)
{
Assert.Contains(MovablePosition.Get(side, adjacent), edges);
}
// Corners
MovablePosition[] corners = squares.Where(MovablePosition.IsCorner).ToArray();
Assert.Equal(4, corners.Length);
for (int i = 0; i < 4; ++i)
{
Assert.Contains(MovablePosition.Get(side, adjacents[i] | adjacents[(i + 1) % 4]), corners);
}
}
void Assert_CanFindClockwiseAdjacentSidesOf(Side side)
{
var adjacents = CubeGeometry.GetClockwiseAdjacentFaces(side);
Assert.Equal(4, adjacents.Length);
var opposite = CubeGeometry.OppositeSideOf(side);
foreach (var adjacent in adjacents)
{
Assert.True(adjacent != side && adjacent != opposite);
}
Assert_AdjacentSidesListGoAroundFaceInOrder(adjacents);
}
static public MovablePosition[] GetMovablePositionsForSide(Side side)
{
Side[] adjacents = CubeGeometry.GetClockwiseAdjacentFaces(side);
return(new[] {
MovablePosition.Get(side, adjacents[0]),
MovablePosition.Get(side, adjacents[1]),
MovablePosition.Get(side, adjacents[2]),
MovablePosition.Get(side, adjacents[3]),
MovablePosition.Get(side, adjacents[0] | adjacents[1]),
MovablePosition.Get(side, adjacents[1] | adjacents[2]),
MovablePosition.Get(side, adjacents[2] | adjacents[3]),
MovablePosition.Get(side, adjacents[3] | adjacents[0]),
});
}