EntityIdTest.java

public class ExampleTest {

    public static class PetOwner extends Component {
        public PetOwner() {}
        @LinkPolicy(LinkPolicy.Policy.CHECK_SOURCE_AND_TARGETS)
        @EntityId public IntBag pets =new IntBag();
    }
    Entity junkdog;
    Entity yak;

    @Test
    public void When_monitored_intbag_Should_detach_deleted_entities() {


        class System1 extends BaseSystem {
            @Override
            protected void processSystem() {
                junkdog = world.createEntity();
                yak = world.createEntity();

                PetOwner junkdogPetOwner = junkdog.edit().create(PetOwner.class);
                junkdogPetOwner.pets.add(yak.getId());
            }
        }

        class System2 extends BaseSystem {
            @Override
            protected void processSystem() {
                world.deleteEntity(yak);
            }
        }


        class System3 extends BaseSystem {
            @Override
            protected void processSystem() {
                Assertions.assertEquals(0, junkdog.getComponent(PetOwner.class).pets.size());
            }
        }

        new World(new WorldConfigurationBuilder()
                .with(new EntityLinkManager(), new System1(), new System2(), new System3()).build()).process();
    }
    
    public static class Pet extends Component {
        public Pet() {}
        @EntityId public int id=-1;
    }

    @Test
    public void When_monitored_int_Should_detach_deleted_entities() {


        class System1 extends BaseSystem {
            @Override
            protected void processSystem() {
                junkdog = world.createEntity();
                yak = world.createEntity();

                Pet pet = yak.edit().create(Pet.class);
                pet.id = junkdog.getId();
            }
        }

        class System2 extends BaseSystem {
            @Override
            protected void processSystem() {
                world.deleteEntity(junkdog);
            }
        }


        class System3 extends BaseSystem {
            @Override
            protected void processSystem() {
                Assertions.assertEquals(-1, yak.getComponent(Pet.class).id);
            }
        }

        new World(new WorldConfigurationBuilder()
                .with(new EntityLinkManager(), new System1(), new System2(), new System3()).build()).process();
    }

}