@Test
 public void yLayoutTest() {
   assertEquals(0, vertex.getLayoutY(), 1e-10);
 }
 @Test
 public void setHeightTest() {
   vertex.setHeight(5);
   assertEquals(5, vertex.getHeight(), 1e-10);
 }
 @Test
 public void getHeightTest() {
   // 10 * VERTICALSCALE - SPACING
   assertEquals(10 * 40 - 2, vertex.getHeight(), 1e-10);
 }
 @Test
 public void setWidthTest() {
   vertex.setWidth(5);
   assertEquals(5, vertex.getWidth(), 1e-10);
 }
 @Test
 public void getWidthTest() {
   // 10 * HORIZONTALSCALE - SPACING
   assertEquals(10 * 11 - 2, vertex.getWidth(), 1e-10);
 }