added Test for CreateLayout method

src/test/java/Gui/GameGuiTest.java

@@ -22,6 +22,13 @@ class GameGuiTest {
 	    gameGui.createGui();
 	}
 
+	@Test
+	public void testCreateLayout() {
 
+	    assertNotNull(gameGui.gbc);
+	    assertEquals(1, gameGui.gbc.gridwidth);
+	    assertEquals(GridBagConstraints.HORIZONTAL, gameGui.gbc.fill);
+	    assertEquals(new Insets(10, 10, 10, 10), gameGui.gbc.insets);
+	}
 
 }