rover kata java, junit 1.31.12

rover.java

package PokerKata;

import org.junit.Assert.*;

public class Rover {

   public class Bot {

      public String facing;
      public int X;
      public int Y;

      public Bot(String face, int x, int y) {
         facing = face;
         X = x;
         Y = y;
      }
   }

   public Bot createBot(String face, int x, int y) {
      return new Bot(face, x, y);
   }

   public void go(Bot bot, String str) {

      if (str.equals("f")) { //forward commands
         if (bot.facing.equals("W")) {
            bot.X--;
         } else if (bot.facing.equals("E")) {
            bot.X++;
         } else {
            if (bot.Y == 1) {
               bot.Y = 0;
            } else {
               bot.Y++;
            }
         }
      }

      if (str.equals("b")) //backward commands
      {
         bot.Y -= 1;
         if (bot.Y == -1) {
            bot.Y = 1;
         }
      }
   }
}

package PokerKata;

import PokerKata.Rover.Bot;
import org.junit.Assert;
import org.junit.Test;

public class RoverTest {
   
   public RoverTest() { }

   @Test
   public void testMoveNorth() {
      Rover rover = new Rover();
      Bot bot = rover.createBot("N", 0, 0);
      rover.go(bot, "f");
      Assert.assertEquals(0, bot.X);
      Assert.assertEquals(1, bot.Y);
      Assert.assertEquals("N", bot.facing);
   }
   
   @Test
   public void testMoveSouth() {
      Rover rover = new Rover();
      Bot bot = rover.createBot("N",1,1);
      rover.go(bot, "b");
      Assert.assertEquals(1, bot.X);
      Assert.assertEquals(0, bot.Y);
   }
   
   @Test
   public void testLoopSouth() {
      Rover rover = new Rover();
      Bot bot = rover.createBot("N",0,0);
      rover.go(bot, "b");
      Assert.assertEquals(0, bot.X);
      Assert.assertEquals(1, bot.Y);
   }
   
   @Test
   public void testLoopNorth() {
      Rover rover = new Rover();
      Bot bot = rover.createBot("N",1,1);
      rover.go(bot, "f");
      Assert.assertEquals(1, bot.X);
      Assert.assertEquals(0, bot.Y);
   }
   
   @Test
   public void testMoveForwardWhileFacingWest() {
      Rover rover = new Rover();
      Bot bot = rover.createBot("W", 1, 0);
      rover.go(bot, "f");
      Assert.assertEquals(0, bot.X);
      Assert.assertEquals(0, bot.Y);
   }
   
   @Test
   public void testMoveForwardWhileFacingEast() {
      Rover rover = new Rover();
      Bot bot = rover.createBot("E", 0, 0);
      rover.go(bot, "f");
      Assert.assertEquals(1, bot.X);
      Assert.assertEquals(0, bot.Y);
   }
}