Add Uni Test AIGridGUI

src/test/java/AIGridGUITest.java

@@ -14,4 +14,14 @@ public class AIGridGUITest {
         assertEquals(45, result);
     }
 
+    @Test
+    public void testMoveDown() {
+        AIGridGUI aiGridGUI = new AIGridGUI(5, 5);
+        int testLocation = 10;
+
+        int result = aiGridGUI.moveDown(testLocation);
+
+        assertEquals(15, result);
+    }
+
 }