update UnitTest BShipTest

src/test_/java/BShipTest.java

@@ -1,6 +1,8 @@
 import BattleShip.BShip;
 import org.junit.jupiter.api.Test;
 
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+
 class BShipTest {
     @Test
     public void testStartGame() {
@@ -9,5 +11,8 @@ class BShipTest {
         bShip.autoPlacement = true;
 
         bShip.startGame();
+
+        assertNotNull(bShip.grid1);
+        assertNotNull(bShip.grid2);
     }
 }