public LawnMowerState ParseLawnMowerState(
string input)
{
var match = LawnMowerStateRegex.Match(input);
if (!match.Success)
{
throw new InvalidInputException($"Lawn mower initial state ({input}) is not in correct format");
}
try
{
int x = int.Parse(match.Groups["X"].Value);
int y = int.Parse(match.Groups["Y"].Value);
char directionSign = match.Groups["DirectionSign"].Value[0];
var position = new Position(x, y);
var direction = Direction.GetBySign(directionSign);
return new LawnMowerState(position, direction);
}
catch (Exception e)
{
throw new InvalidInputException(e.Message);
}
}
public void GetAdjacentPosition_ShouldThrowWhenNullIsPassedIn()
{
var position = new Position(2, 3);
Action call = () => position.GetAdjacentPosition(null);
call.ShouldThrow<ArgumentNullException>();
}
public bool IsPositionWithinLawn(
Position position)
{
return position.X >= 0
&& position.X <= RightmostCoordinate
&& position.Y >= 0
&& position.Y <= TopmostCoordinate;
}
public void GetAdjacentPosition_ShouldReturnCorrectPosition()
{
var position = new Position(2, 3);
var adjacentPosition =
position.GetAdjacentPosition(Direction.North);
adjacentPosition.X.Should().Be(2);
adjacentPosition.Y.Should().Be(4);
}
public LawnMowerState(
Position position,
Direction direction)
{
if (direction == null)
{
throw new ArgumentNullException(nameof(direction));
}
Position = position;
Direction = direction;
}
public void IsPositionWithinLawn_ShouldReturnTrueWhenPositionIsWithin(
int positionX,
int positionY)
{
var lawnSize = new LawnSize(5, 10);
var position = new Position(positionX, positionY);
lawnSize
.IsPositionWithinLawn(position)
.Should()
.BeTrue();
}
