LTE Mars Rover - WhenTurningRight

RoverFacingEast.cs

public void Execute(Action ifNorth, Action ifSouth, Action ifEast, Action ifWest)
{
  switch(Orienation)
  {
    case Direction.North: ifNorth(); break;
    case Direction.South: ifSouth(); break;
    case Direction.East: ifEast(); break;
    case Direction.West: ifWest(); break;
  }
}

public void TurnRight()
{
  Action ifNorth = () => Orientation = Direction.East;
  Action ifSouth = () => {};
  Action ifEast = () => Orientation = Direction.South;
  Action ifWest = () => {};
  
  Execute(ifNorth, ifSouth, ifEast, ifWest);
}

RoverFacingNorth.cs

public void Execute(Action ifNorth, Action ifSouth, Action ifEast, Action ifWest)
{
  switch(Orienation)
  {
    case Direction.North: ifNorth(); break;
    case Direction.South: ifSouth(); break;
    case Direction.East: ifEast(); break;
    case Direction.West: ifWest(); break;
  }
}

public void TurnRight()
{
  Action ifNorth = () => Orientation = Direction.East;
  Action ifSouth = () => {};
  Action ifEast = () => {};
  Action ifWest = () => {};
  
  Execute(ifNorth, ifSouth, ifEast, ifWest);
}

RoverFinal.cs

public class Rover
{
  public Direction Orientation { get; set; }
  public Coordinate Location { get; set; }

  public Rover()
  {
    Orientation = Direction.North;
    Location = new Coordinate();
  }

  public void MoveForward()
  {
    Action ifNorth = () => Location=Location.AdjustYBy(1);
    Action ifSouth = () => Location=Location.AdjustYBy(-1);
    Action ifEast = () => Location=Location.AdjustXBy(1);
    Action ifWest = () => Location=Location.AdjustXBy(-1);
    
    Execute(ifNorth, ifSouth, ifEast, ifWest);
  }

  public void MoveBackward()
  {
    Action ifNorth = () => Location=Location.AdjustYBy(-1);
    Action ifSouth = () => Location=Location.AdjustYBy(1);
    Action ifEast = () => Location=Location.AdjustXBy(-1);
    Action ifWest = () => Location=Location.AdjustXBy(1);
    
    Execute(ifNorth, ifSouth, ifEast, ifWest);
  }

  public void TurnLeft()
  {
    Action ifNorth = () => Orientation = Direction.West;
    Action ifWest = () => Orientation = Direction.South;
    Action ifSouth = () => Orientation = Direction.East;
    Action ifEast = () => Orientation = Direction.North;
    
    Execute(ifNorth, ifSouth, ifEast, ifWest);
  }

  public void TurnRight()
  {
    Action ifNorth = () => Orientation = Direction.East;
    Action ifEast = () => Orientation = Direction.South;
    Action ifSouth = () => Orientation = Direction.West;
    Action ifWest = () => Orientation = Direction.North;

    Execute(ifNorth, ifSouth, ifEast, ifWest);
  }
  
  private void Execute(Action ifNorth, Action ifSouth, Action ifEast, Action ifWest)
  {
    switch(Orientation)
    {
      case Direction.North: ifNorth(); break;
      case Direction.South: ifSouth(); break;
      case Direction.East: ifEast(); break;
      case Direction.West: ifWest(); break;
    }
  }
}

RoverSouthAndWest.cs

public void Execute(Action ifNorth, Action ifSouth, Action ifEast, Action ifWest)
{
  switch(Orienation)
  {
    case Direction.North: ifNorth(); break;
    case Direction.South: ifSouth(); break;
    case Direction.East: ifEast(); break;
    case Direction.West: ifWest(); break;
  }
}

public void TurnRight()
{
  Action ifNorth = () => Orientation = Direction.East;
  Action ifSouth = () => Orientation = Direction.West;
  Action ifEast = () => Orientation = Direction.South;
  Action ifWest = () => Orientation = Direction.North;
  
  Execute(ifNorth, ifSouth, ifEast, ifWest);
}

WhenTurningRight.cs

[TestFixture]
public class WhenTurningRight
{  
  [Test]
  [TestCase(Direction.North, Direction.East, TestName = "AndFacingNorthThenTheRoverFacesEast")]
  public void RoverTurningRight(Direction start, Direction expected)
  {
    var rover = new Rover { Orientation = start };
    var initialLocation = rover.Location;

    rover.TurnRight();

    Assert.AreEqual(expected, rover.Orientation);
    Assert.AreEqual(initialLocation, rover.Location);
  }
  
  [Test]
  [TestCase(Direction.North, Direction.East, TestName = "AndFacingNorthThenTheRoverFacesEast")]
  [TestCase(Direction.East, Direction.South, TestName = "AndFacingEastThenTheRoverFacesSouth")]
  public void RoverTurningRight(Direction start, Direction expected)
  {
    var rover = new Rover { Orientation = start };
    var initialLocation = rover.Location;

    rover.TurnRight();

    Assert.AreEqual(expected, rover.Orientation);
    Assert.AreEqual(initialLocation, rover.Location);
  }
  
  [Test]
  [TestCase(Direction.North, Direction.East, TestName = "AndFacingNorthThenTheRoverFacesEast")]
  [TestCase(Direction.East, Direction.South, TestName = "AndFacingEastThenTheRoverFacesSouth")]
  [TestCase(Direction.South, Direction.West, TestName = "AndFacingSouthThenTheRoverFacesWest")]
  [TestCase(Direction.West, Direction.North, TestName = "AndFacingWestThenTheRoverFacesNorth")]
  public void RoverTurningRight(Direction start, Direction expected)
  {
    var rover = new Rover { Orientation = start };
    var initialLocation = rover.Location;

    rover.TurnRight();

    Assert.AreEqual(expected, rover.Orientation);
    Assert.AreEqual(initialLocation, rover.Location);
  }
}