public MarsRover(int coordX, int coordY, Direction direction, Plateau plateau, NavigationCommand[] navCommands)
{
if (plateau == null || (plateau.BottomLeftCoordX == plateau.TopRightCoordX && plateau.BottomLeftCoordY == plateau.TopRightCoordY))
{
//if Plateau initialization data is invalid/incomplete, we cannot create a rover that we can work with
throw new ArgumentException("Plateau is invalid.");
}
if (navCommands == null || navCommands.Length == 0)
{
throw new ArgumentException("Invalid navigation commands");
}
Plateau = plateau;
Direction = direction;
NavigationCommands = navCommands;
if (ValidateRoverCoordinates(coordX, coordY))
{
CoordX = coordX;
CoordY = coordY;
}
else
{
//if initial values of Rover coordinates are not valid, place the rover in the approximate center of the plateau
CoordX = Plateau.BottomLeftCoordX + (Plateau.TopRightCoordX - plateau.BottomLeftCoordY) / 2;
CoordY = Plateau.BottomLeftCoordY + (Plateau.TopRightCoordY - plateau.BottomLeftCoordY) / 2;
}
}
public void Navigate_CommandsWithMovesOutOfBounds_ReturnSkippedMoves_AssignCorrectCoords()
{
var plateau = new Plateau
{
BottomLeftCoordX = 0,
BottomLeftCoordY = 0,
TopRightCoordX = 5,
TopRightCoordY = 5
};
//the second move command will be out of bounds
var commands = new NavigationCommand[] { NavigationCommand.M, NavigationCommand.M, NavigationCommand.R, NavigationCommand.M };
var rover = new MarsRover(4, 5, App.Enums.Direction.E, plateau, commands);
var result = rover.Navigate(commands);
Assert.IsNotNull(result);
Assert.AreEqual(result.Count, 1);
Assert.AreEqual(result[0], 1);
Assert.AreEqual(rover.CoordX, 5);
Assert.AreEqual(rover.CoordY, 4);
Assert.AreEqual(rover.Direction, Direction.S);
}
public void MarsRover_InvalidPlateau_Exception()
{
var plateau = new Plateau
{
BottomLeftCoordX = 1,
BottomLeftCoordY = 1,
TopRightCoordX = 1,
TopRightCoordY = 1
};
var commands = new NavigationCommand[] { NavigationCommand.M, NavigationCommand.M, NavigationCommand.R, NavigationCommand.M };
var rover = new MarsRover(1, 2, App.Enums.Direction.E, plateau, commands);
}
public void MarsRover_ValidRoverCoords_AssignRoverCoords()
{
var plateau = new Plateau
{
BottomLeftCoordX = 0,
BottomLeftCoordY = 0,
TopRightCoordX = 5,
TopRightCoordY = 5
};
var commands = new NavigationCommand[] { NavigationCommand.M, NavigationCommand.M, NavigationCommand.R, NavigationCommand.M };
var rover = new MarsRover(2, 3, App.Enums.Direction.E, plateau, commands);
Assert.AreEqual(rover.CoordX, 2);
Assert.AreEqual(rover.CoordY, 3);
}
public void TryMove_MoveInBounds_ReturnTrue_AssignCorrectCoords()
{
var plateau = new Plateau
{
BottomLeftCoordX = 0,
BottomLeftCoordY = 0,
TopRightCoordX = 5,
TopRightCoordY = 5
};
var commands = new NavigationCommand[] { NavigationCommand.M, NavigationCommand.R, NavigationCommand.M, NavigationCommand.M, NavigationCommand.R };
var rover = new MarsRover(4, 5, App.Enums.Direction.W, plateau, commands);
var result = rover.TryMove(NavigationCommand.M);
Assert.AreEqual(rover.CoordX, 3);
Assert.AreEqual(rover.CoordY, 5);
Assert.AreEqual(rover.Direction, Direction.W);
}
public void TryMove_Right_ReturnTrue_KeepOldCoords_ChangeDirection()
{
var plateau = new Plateau
{
BottomLeftCoordX = 0,
BottomLeftCoordY = 0,
TopRightCoordX = 5,
TopRightCoordY = 5
};
var commands = new NavigationCommand[] { NavigationCommand.M, NavigationCommand.R, NavigationCommand.M, NavigationCommand.M, NavigationCommand.R };
var rover = new MarsRover(4, 5, App.Enums.Direction.N, plateau, commands);
var result = rover.TryMove(NavigationCommand.R);
Assert.AreEqual(rover.CoordX, 4);
Assert.AreEqual(rover.CoordY, 5);
Assert.AreEqual(rover.Direction, Direction.E);
}
public MarsRoverStation(string inputFilePath)
{
if (string.IsNullOrEmpty(inputFilePath))
{
throw new ArgumentException("Input file path not entered.");
}
if (!File.Exists(inputFilePath))
{
throw new ArgumentException("Input file path invalid - file doesn't exist.");
}
var fileContents = File.ReadAllLines(inputFilePath);
if (fileContents == null || fileContents.Length < 3)
{
throw new ArgumentException("Insufficient data in file.");
}
var plateauCoords = fileContents[0].Split(null);
var coord = 0;
if (plateauCoords == null || plateauCoords.Length < 2 || !int.TryParse(plateauCoords[0], out coord) || !int.TryParse(plateauCoords[1], out coord))
{
throw new ArgumentException("Invalid plateau initialization data");
}
var plateau = new Plateau
{
BottomLeftCoordX = 0,
BottomLeftCoordY = 0,
TopRightCoordX = int.Parse(plateauCoords[0]),
TopRightCoordY = int.Parse(plateauCoords[1])
};
Rovers = new List<MarsRover>();
var i = 1;
while (i < fileContents.Length)
{
var roverInit = fileContents[i].Split(null);
var direction = Direction.E;
if (roverInit == null || roverInit.Length < 3 || !int.TryParse(roverInit[0], out coord) || !int.TryParse(roverInit[1], out coord) || !Enum.TryParse<Direction>(roverInit[2], out direction))
{
throw new ArgumentException("Invalid rover init data.");
}
i++;
if (string.IsNullOrEmpty(fileContents[i]))
{
throw new ArgumentException("Invalid rover command data");
}
var commandsInit = fileContents[i].Select(c => c.ToString()).ToArray();
var listCommands = new List<NavigationCommand>();
foreach (var cmd in commandsInit)
{
listCommands.Add((NavigationCommand)Enum.Parse(typeof(NavigationCommand), cmd));
}
var marsRover = new MarsRover(int.Parse(roverInit[0]), int.Parse(roverInit[1]), (Direction)Enum.Parse(typeof(Direction), roverInit[2]), plateau, listCommands.ToArray());
Rovers.Add(marsRover);
i++;
}
}