public void TestIsValidPosition_StartingPosition()
{
SquareBoard squareBoard = new SquareBoard(5, 5);
Position position = new Position(0, 0);
var result = squareBoard.IsValidPosition(position);
Assert.IsTrue(result);
}
public void TestIsValidPosition_PositionInBound()
{
SquareBoard squareBoard = new SquareBoard(5, 5);
Position position = new Position(1, 4);
var result = squareBoard.IsValidPosition(position);
Assert.IsTrue(result);
}
public void TestIsValidPosition_PositionOutOfBound()
{
SquareBoard squareBoard = new SquareBoard(5, 5);
Position position = new Position(6, 6);
var result = squareBoard.IsValidPosition(position);
Assert.IsFalse(result);
}
public void TestIsValidPosition_NegativePosition()
{
SquareBoard squareBoard = new SquareBoard(5, 5);
Position position = new Position(-1, -1);
var result = squareBoard.IsValidPosition(position);
Assert.IsFalse(result);
}
/// <summary>
/// Determines the next position of the robot based on the direction it's currently facing.
/// </summary>
/// <returns>Next position</returns>
public Position GetNextPosition()
{
var newPosition = new Position(Position.X, Position.Y);
switch (Direction)
{
case Direction.North:
newPosition.Y = newPosition.Y + 1;
break;
case Direction.East:
newPosition.X = newPosition.X + 1;
break;
case Direction.South:
newPosition.Y = newPosition.Y - 1;
break;
case Direction.West:
newPosition.X = newPosition.X - 1;
break;
}
return newPosition;
}
/// <summary>
/// Parsers the robot's initial position and the direction it is going to be facing.
/// </summary>
/// <exception cref="ArgumentException">Throws when raw input does not match the "PLACE" command parameter pattern.</exception>
/// <param name="input">Input provided (input is split by blank space)</param>
/// <returns>Place command parameter</returns>
public ICommandParameter ParseParameters(string[] input)
{
Direction direction;
Position position = null;
//Ensure that Place command is followed by valid command parameters (X,Y and F robot's face direction).
if (input.Length < CommandInputCount || input.Length > CommandInputCount)
throw new ArgumentException("Incomplete command. Please ensure that the PLACE command is using format: PLACE X,Y,F");
//Ensure that three command parameters are provided for the PLACE command.
var commandParams = input[1].Split(',');
if (commandParams.Length < ParameterCount || commandParams.Length > ParameterCount)
throw new ArgumentException("Incomplete command. Please ensure that the PLACE command is using format: PLACE X,Y,F");
//Parse the direction which the robot is going to be facing.
if (!Enum.TryParse(commandParams[commandParams.Length - 1], true, out direction))
throw new ArgumentException("Invalid direction. Please select from one of the following directions: NORTH|EAST|SOUTH|WEST");
var x = Convert.ToInt32(commandParams[0]);
var y = Convert.ToInt32(commandParams[1]);
position = new Position(x, y);
return new PlaceCommandParameter(position, direction);
}
public void TestPlaceRobot_ValidPositonAndDirection()
{
var position = new Position(1, 1);
var robot = new ToyRobot();
robot.Place(position, Direction.East);
Assert.AreEqual(1, robot.Position.X);
Assert.AreEqual(1, robot.Position.Y);
}
/// <summary>
/// Sets the robot's position and direction.
/// </summary>
/// <param name="position">Position of a robot on a square board.</param>
/// <param name="direction">direction which the robot will be facing.</param>
public void Place(Position position, Direction direction)
{
this.Position = position;
this.Direction = direction;
}
public PlaceCommandParameter(Position position,Direction direction)
{
Position = position;
Direction = direction;
}
/// <summary>
/// Check whether the position specified is inside the boundaries of the square board.
/// </summary>
/// <param name="position"></param>
/// <returns>true if positions are within the boundaries of the square board</returns>
public bool IsValidPosition(Position position)
{
return position.X < Columns && position.X >= 0 &&
position.Y < Rows && position.Y >= 0;
}
