Fix attempt on my buggy unit tests. Pending actual run though, but progress has been made.

src/main/java/dotsandboxes/DotsAndBoxesGrid.java

@@ -111,7 +111,7 @@ 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).
         //Return true if box complete, false if not.

src/test/java/dotsandboxes/DotsAndBoxesGridTest.java

@@ -44,7 +44,9 @@ public class DotsAndBoxesGridTest {
         //should return false. Not dependent on a dots and boxes object existing as method is recursively called when "drawing" a line but is not yet complete.
         int knownIncompleteX = 1;
         int knownIncompleteY = 2;
-        boolean boxCompleteResult = boxComplete(knownIncompleteX, knownIncompleteY);
+        DotsAndBoxesGrid test3by3 = new DotsAndBoxesGrid(3, 3, 1);
+        boolean incompleteBox = test3by3.drawHorizontal(knownIncompleteX, knownIncompleteY, 1);
+        boolean boxCompleteResult = test3by3.boxComplete(knownIncompleteX, knownIncompleteY);
         assertFalse(boxCompleteResult);
     }
 
@@ -55,9 +57,9 @@ public class DotsAndBoxesGridTest {
         //Draw a horizontal line from 1, 2 to 2,2.
         //Draw the above line again and assert that it throws an IllegalStateException.
 
-        DotsAndBoxesGrid test3by3 = DotsAndBoxesGrid(3, 3, 1);
-        boolean initialLine = drawHorizontal(1, 2, 1);
-        assertThrows(sameLine = drawHorizontal(1, 2, 1), IllegalStateException);
+        DotsAndBoxesGrid test3by3 = new DotsAndBoxesGrid(3, 3, 1);
+        boolean initialLine = test3by3.drawHorizontal(1, 2, 1);
+        assertThrows(IllegalStateException.class,() -> test3by3.drawHorizontal(1, 2, 1));
 
     }
 
@@ -67,9 +69,9 @@ public class DotsAndBoxesGridTest {
         //Draw a horizontal line from 1, 2 to 2,2.
         //Draw the above line again and assert that it throws an IllegalStateException.
 
-        DotsAndBoxesGrid test3by3 = DotsAndBoxesGrid(3, 3, 1);
-        boolean initialLine = drawVertical(3, 1, 1);
-        assertThrows(sameLine = drawHorizontal(3, 1, 1), IllegalStateException);
+        DotsAndBoxesGrid test3by3 = new DotsAndBoxesGrid(3, 3, 1);
+        boolean initialLine = test3by3.drawVertical(3, 1, 1);
+        assertThrows(IllegalStateException.class,() -> test3by3.drawVertical(3, 1, 1));
 
     }
 }