@Test
 public void whenShouldCheckGetByIndex() {
   init();
   StoreUser storeUser = new StoreUser(listUser);
   String result = storeUser.getByIndex(0).getId();
   assertThat(result, is("0"));
 }
 @Test
 public void whenShouldCheckAdd() {
   init();
   StoreUser storeUser = new StoreUser(listUser);
   storeUser.add(new User("5"));
   String result = storeUser.getByIndex(5).getId();
   assertThat(result, is("5"));
 }