move the new coordinate resolution to MarsMap

src/main/java/cat/hack3/codingtests/marsrover/Coordinates.java

@@ -1,22 +1,8 @@
 package cat.hack3.codingtests.marsrover;
 
-
-
-import java.util.logging.Logger;
-
-/**
- * Notice that the representation is the following:
- * Latitude is Y, starts from 1 on the top and goes down incrementally
- * Longitude is X, starts from 1 on the left and goes to right incrementally
- *     1    2    3
- * 1  1-1  1-2  1-3
- * 2  2-1  2-2  2-3
- * 3  3-1  3-2  3-3
- */
 public class Coordinates {
     private final int latitude;
     private final int longitude;
-    private final Logger logger = Logger.getLogger(Coordinates.class.getName());
 
     public static Coordinates of(int latitude, int longitude) {
         return new Coordinates(latitude, longitude);
@@ -27,19 +13,12 @@ public class Coordinates {
         this.longitude = longitude;
     }
 
-    public Coordinates getNextPositionTowards(Direction direction) {
-        var newLatitude = latitude;
-        var newLongitude = longitude;
-        switch (direction) {
-            case NORTH -> newLatitude--;
-            case SOUTH -> newLatitude++;
-            case WEST -> newLongitude--;
-            case EAST -> newLongitude++;
-        }
-        logger.info(String.format("Updated coordinates towards %s, now is %d-%d",
-                direction, newLatitude, newLongitude));
+    public int getLatitude() {
+        return latitude;
+    }
 
-        return new Coordinates(newLatitude, newLongitude);
+    public int getLongitude() {
+        return longitude;
     }
 
     @Override

src/main/java/cat/hack3/codingtests/marsrover/MarsMap.java

@@ -1,12 +1,45 @@
 package cat.hack3.codingtests.marsrover;
 
+import java.util.logging.Logger;
+
+/**
+ * Notice that the representation is the following:
+ * Latitude is Y, starts from 1 on the top and goes down incrementally
+ * Longitude is X, starts from 1 on the left and goes to right incrementally
+ *     1    2    3
+ * 1  1-1  1-2  1-3
+ * 2  2-1  2-2  2-3
+ * 3  3-1  3-2  3-3
+ */
 public class MarsMap {
+    Logger logger = Logger.getLogger(this.getClass().getName());
+
     private final int width;
     private final int height;
+    private Coordinates currentPosition;
 
-    public MarsMap(int width, int height) {
+    public MarsMap(int width, int height, Coordinates startingCoordinates) {
         this.width = width;
         this.height = height;
+        currentPosition = startingCoordinates;
     }
 
+    public Coordinates updatePositionTowards(Direction direction) {
+        return currentPosition = resolveNextPositionTowards(direction);
+    }
+
+    private Coordinates resolveNextPositionTowards(Direction direction) {
+        var newLatitude = currentPosition.getLatitude();
+        var newLongitude = currentPosition.getLongitude();
+        switch (direction) {
+            case NORTH -> newLatitude--;
+            case SOUTH -> newLatitude++;
+            case WEST -> newLongitude--;
+            case EAST -> newLongitude++;
+        }
+        logger.info(String.format("Updated coordinates towards %s, now is %d-%d",
+                direction, newLatitude, newLongitude));
+
+        return new Coordinates(newLatitude, newLongitude);
+    }
 }

src/main/java/cat/hack3/codingtests/marsrover/MarsRover.java

@@ -12,11 +12,11 @@ public class MarsRover {
     }
 
     public Coordinates moveForward() {
-        return currentCoordinates = currentCoordinates.getNextPositionTowards(currentDirection);
+        return currentCoordinates = marsMap.updatePositionTowards(currentDirection);
     }
 
     public Coordinates moveBackwards() {
-        return currentCoordinates = currentCoordinates.getNextPositionTowards(currentDirection.reversed());
+        return currentCoordinates = marsMap.updatePositionTowards(currentDirection.reversed());
     }
 
     public Direction turnLeft() {

src/test/java/cat/hack3/codingtests/marsrover/MarsRoverTest.java

@@ -17,11 +17,10 @@ public class MarsRoverTest {
     public void setUp() {
         int mapWidth = 10;
         int mapHeight = 10;
-        var marsMap = new MarsMap(mapWidth, mapHeight);
-
         int latitudeStartingPoint = 2;
         int longitudeStartingPoint = 3;
         var startingCoordinates = Coordinates.of(latitudeStartingPoint, longitudeStartingPoint);
+        var marsMap = new MarsMap(mapWidth, mapHeight, startingCoordinates);
         rover = new MarsRover(marsMap, startingCoordinates, SOUTH);
     }