Commit bugfixes for code

src/main/java/dotsandboxes/DotsAndBoxesGrid.java

@@ -110,10 +110,14 @@ public class DotsAndBoxesGrid {
             if (x >= width - 1 || x < 0 || y >= height -1 || y < 0) {
                 return false;
             }
-
-        // A box is complete if the north and south horizontals and the east and west verticals have all been drawn.
-        // FIXME: You'll need to fix this code (after writing a test first).
+            if ((getHorizontal(x, y) && getHorizontal(x, y + 1) &&
+                getVertical(x, y) && getVertical(x + 1, y))) {
+                return true;
+            }
+            else
+            {
                 return true;
+
     }
 
     /** Tries to claim a box for a player. If the box is complete, sets the ownership and returns true. */
@@ -140,7 +144,9 @@ public class DotsAndBoxesGrid {
             throw new IndexOutOfBoundsException(String.format("y was %d, which is out of range. Range is 0 to %d", y, height));
         }
 
-        // FIXME: You need to throw an exception if the line was already drawn.
+        if (getHorizontal(x, y)) {
+            throw new RuntimeException("Line already drawn.");
+        }
 
         this.horizontals[x][y] = true;
 
@@ -171,7 +177,9 @@ public class DotsAndBoxesGrid {
             throw new IndexOutOfBoundsException(String.format("y was %d, which is out of range. Range is 0 to %d", y, height - 1));
         }
 
-        // You need to throw an exception if the line was already drawn.
+        if (getVertical(x, y)) {
+            throw new RuntimeException("Line already drawn.");
+        }
 
         this.verticals[x][y] = true;
         // Try to claim the north or south boxes