@Test
 public void addMoreThanTheInitialSize() {
   fillVector();
   Circle s = new Circle(2.0);
   vector.add(s);
   assertEquals(s, vector.get(SortedShapeVector.capacityIncrement));
 }
 @Test
 public void addTwoElementsInSortedOrder() {
   Circle s1 = new Circle(2.0);
   Circle s2 = new Circle(1.0);
   vector.add(s2);
   vector.add(s1);
   assertEquals(s1, vector.get(0));
   assertEquals(s2, vector.get(1));
 }
 @Test
 public void getsAnElement() {
   Circle s = new Circle(2.0);
   vector.add(s);
   assertEquals(s, vector.get(0));
 }