@Test
public void testAddAndRemoveChildrenEmitsEvent() {
entity = app.createAndManageChild(EntitySpec.create(TestEntity.class));
assertCollectionEquals(app.getChildren(), ImmutableList.of(entity));
assertEqualsEventually(added, ImmutableList.of(entity));
entity2 = app.createAndManageChild(EntitySpec.create(TestEntity.class));
assertCollectionEquals(app.getChildren(), ImmutableList.of(entity, entity2));
assertEqualsEventually(added, ImmutableList.of(entity, entity2));
entity.removeChild(entity);
assertCollectionEquals(app.getChildren(), ImmutableList.of(entity2));
assertEqualsEventually(removed, ImmutableList.of(entity));
Entities.unmanage(entity2);
assertCollectionEquals(app.getChildren(), ImmutableList.of());
assertEqualsEventually(removed, ImmutableList.of(entity, entity2));
}
