public void RunInstructions_Move_faceNorth()
{
var instructions = new LawnmowerInstructions
{
BoundaryWidth = 5,
BoundaryHeight = 5,
StartX = 3,
StartY = 3,
StartDirection = "E",
Instructions = new List<char>
{
'M',
'M',
'R',
'M',
'M',
'R',
'M',
'R',
'R',
'M'
}
};
var result = lawnmowerCommaner.RunInstructions(instructions);
Assert.AreEqual(5, result.X);
Assert.AreEqual(1, result.Y);
Assert.AreEqual("E", result.Facing);
}
public void RunInstructions_Move_MoveNorthOnce()
{
var instructions = new LawnmowerInstructions
{
BoundaryWidth = 5,
BoundaryHeight = 5,
StartX = 1,
StartY = 2,
StartDirection = "N",
Instructions = new List<char>
{
'L',
'M',
'L',
'M',
'L',
'M',
'L',
'M',
'M'
}
};
var result = lawnmowerCommaner.RunInstructions(instructions);
Assert.AreEqual(1, result.X);
Assert.AreEqual(3, result.Y);
Assert.AreEqual("N", result.Facing);
}
public LawnmowerPosition RunInstructions(LawnmowerInstructions lawnmowerInstructions)
{
var lawnmower = new LawnmowerPosition
{
Facing = lawnmowerInstructions.StartDirection,
X = lawnmowerInstructions.StartX,
Y = lawnmowerInstructions.StartY
};
foreach(var instruction in lawnmowerInstructions.Instructions)
{
lawnmower.Facing = GetNewPosition(lawnmower.Facing, instruction);
lawnmower.X = getXPosition(lawnmower.X, lawnmowerInstructions.BoundaryWidth,lawnmower.Facing, instruction);
lawnmower.Y = getYPosition(lawnmower.Y, lawnmowerInstructions.BoundaryHeight, lawnmower.Facing, instruction);
}
return lawnmower;
}
private List<LawnmowerInstructions> CreateInstructions(string rawInstructions)
{
int countLines = 0;
var output = new List<LawnmowerInstructions>();
var lawnmowerInstructionBoundary = (lawnmowerBoundaries) null;
var tempLawnmowerInstruction = new LawnmowerInstructions();
using (var reader = new StringReader(rawInstructions))
{
string line;
while ((line = reader.ReadLine()) != null)
{
countLines++;
var commands = line.Split(' ');
if (countLines == 1)
{
lawnmowerInstructionBoundary = GetBoundaries(commands);
if(lawnmowerInstructionBoundary == null)
{
return new List<LawnmowerInstructions>();
}
continue;
}
if (lineIsAboutLawnmowerPoistion(countLines))
{
tempLawnmowerInstruction = GetLawnmowerPosition(commands);
if(tempLawnmowerInstruction == null)
{
return new List<LawnmowerInstructions>();
}
continue;
}
AddMovementCommandsAndAddToOutputList(line, lawnmowerInstructionBoundary, tempLawnmowerInstruction, output);
}
}
return output;
}
private void AddMovementCommandsAndAddToOutputList(string commands, lawnmowerBoundaries lawnmowerInstructionBoundary, LawnmowerInstructions tempLawnmowerInstruction, List<LawnmowerInstructions> output)
{
tempLawnmowerInstruction.BoundaryWidth = lawnmowerInstructionBoundary.X;
tempLawnmowerInstruction.BoundaryHeight = lawnmowerInstructionBoundary.Y;
tempLawnmowerInstruction.Instructions = commands.ToCharArray();
output.Add(tempLawnmowerInstruction);
}