public Robot(Coordinate pos, Orientation or, Grid grid)
{
if (!grid.IsValid(pos))
{
throw new Exception("Robot placed outside of grid");
}
_pos = pos;
_or = or;
}
public void TestIsValidTrue()
{
var grid = new Grid(30,30);
Assert.IsTrue(grid.IsValid(new Coordinate(30,1)));
}
public void TestIsValidFalseTooHigh()
{
var grid = new Grid(30,30);
Assert.IsFalse(grid.IsValid(new Coordinate(31,3)));
}
public void TestIsValidFalseNeg()
{
var grid = new Grid(30,30);
Assert.IsFalse(grid.IsValid(new Coordinate(20,-1)));
}
public void Move(Instruction inst, Grid grid)
{
switch (inst)
{
//Modulus used to cycle orientations. Limited definition of modulus with reference to negative
//numbers result in initial incrementation by setsize to guarantee positive result
case Instruction.R:
_or = (Orientation)Enum.ToObject(typeof(Orientation),
(((int)_or + NumOrientations + 1) % NumOrientations));
break;
case Instruction.L:
_or = (Orientation)Enum.ToObject(typeof(Orientation),
(((int)_or + NumOrientations - 1) % NumOrientations));
break;
case Instruction.M:
Coordinate newPos;
switch (_or)
{
case Orientation.N:
newPos = new Coordinate(_pos.X, _pos.Y + 1);
break;
case Orientation.E:
newPos = new Coordinate(_pos.X + 1, _pos.Y);
break;
case Orientation.S:
newPos = new Coordinate(_pos.X, _pos.Y - 1);
break;
case Orientation.W:
newPos = new Coordinate(_pos.X - 1, _pos.Y);
break;
default:
newPos = new Coordinate(-1, -1);
break;
}
if (grid.IsValid(newPos))
{
_pos = newPos;
}
else
{
throw new InvalidOperationException();
}
break;
}
}