public void should_only_trigger_teardown_system_when_entity_loses_required_component()
{
var dummyGroup = new Group(typeof(TestComponentOne), typeof(TestComponentTwo));
var mockPoolManager = Substitute.For <IPoolManager>();
var pool = mockPoolManager.GetPool();
var mockEventSystem = Substitute.For <IEventSystem>();
var fakeSystem = Substitute.For <ITeardownSystem>();
fakeSystem.TargetGroup.Returns(dummyGroup);
var systemExecutor = new SystemExecutor(mockPoolManager, mockEventSystem,
null, null, null, null, null);
systemExecutor.AddSystem(fakeSystem);
var entity = new Entity(Guid.NewGuid(), pool, mockEventSystem);
entity.AddComponent(new TestComponentOne());
entity.AddComponent(new TestComponentTwo());
// Should not trigger
systemExecutor.OnEntityComponentRemoved(new ComponentRemovedEvent(entity, new TestComponentThree()));
// Should trigger
systemExecutor.OnEntityComponentRemoved(new ComponentRemovedEvent(entity, new TestComponentTwo()));
fakeSystem.Received(1).Teardown(Arg.Is(entity));
}
