Implemented testing functions to DotsAndBoxesGridTest.java

src/test/java/dotsandboxes/DotsAndBoxesGridTest.java

@@ -27,5 +27,69 @@ public class DotsAndBoxesGridTest {
         assertTrue(true);
     }
 
-    // FIXME: You need to write tests for the two known bugs in the code.
+
+    /*
+     * This tests the boxComplete() function.
+     */
+    @Test
+    public void testForBoxComplete() {
+        logger.info("Testing if box is complete.");
+
+        // Create new grid instance
+        DotsAndBoxesGrid grid = new DotsAndBoxesGrid(3, 3, 2);  
+
+        // Draw half a box
+        grid.drawVertical(1, 1, 1);
+        grid.drawVertical(2, 1, 1);
+
+        // Test boxComplete() function
+        assertFalse(grid.boxComplete(1, 1));
+
+        // Draw remaining lines
+        grid.drawHorizontal(1, 1, 1);
+        grid.drawHorizontal(1, 2, 1);
+
+        // Test boxComplete() function
+        assertTrue(grid.boxComplete(1, 1));
+    }
+
+    /*
+     * Test for drawHorizontal() function.
+     */
+    @Test
+    public void testDrawHorizontal() {
+        logger.info("Testing drawHorizontal()");
+
+        // Initialise new DotsAndBoxesGrid instance and new player
+        DotsAndBoxesGrid grid = new DotsAndBoxesGrid(3, 3, 2);
+        int player = 1;
+
+        // Draw new line at (1, 1). This should return false as the box is not complete.
+        assertFalse(grid.drawHorizontal(1, 1, player));
+
+        // Try redraw line at (1, 1). This should throw an IllegalStateException.
+        assertThrows(IllegalStateException.class, () -> {
+            grid.drawHorizontal(1, 1, player);
+        });
+    }
+
+    /*
+     * Test for drawVertical() function.
+     */
+    @Test
+    public void testDrawVertical() {
+        logger.info("Testing drawVertical()");
+
+        // Initialise new DotsAndBoxesGrid instance and new player
+        DotsAndBoxesGrid grid = new DotsAndBoxesGrid(3, 3, 2);
+        int player = 1;
+
+        // Draw new line at (1, 1). This should return false as the box is not complete.
+        assertFalse(grid.drawVertical(1, 1, player));
+
+        // Try redraw line at (1, 1). This should throw an IllegalStateException.
+        assertThrows(IllegalStateException.class, () -> {
+            grid.drawVertical(1, 1, player);
+        });
+    }
 }