public void RemovesEntityFromSystem()
{
var oneComponentSystem = new OneComponentSystem();
var manager = new RuntimeSystemManager(new ISystem[] {oneComponentSystem}, Mock.Of<ILogger>());
var oneComponentEntity = new EngineEntity(0, new IComponent[] {new SimpleComponent()},
Mock.Of<IEventDispatcher>());
manager.AddEntities(new[] {oneComponentEntity});
manager.RemoveEntities(new[] {oneComponentEntity});
manager.Systems.Single().Entities.ShouldNotContain(oneComponentEntity);
}
public void CorrectlyFilterEntitiesIntoSystemInstances()
{
var oneComponentSystem = new OneComponentSystem();
var twoComponentSystem = new TwoComponentSystem();
var manager = new RuntimeSystemManager(new ISystem[] {oneComponentSystem, twoComponentSystem}, Mock.Of<ILogger>());
var oneComponentEntity = new EngineEntity(0, new IComponent[] {new SimpleComponent()},
Mock.Of<IEventDispatcher>());
var twoComponentEntity = new EngineEntity(0,
new IComponent[] {new SimpleComponent(), new OtherSimpleComponent(),},
Mock.Of<IEventDispatcher>());
manager.AddEntities(new[] {oneComponentEntity, twoComponentEntity});
manager.Systems.Single(p => p.System == oneComponentSystem).Entities.ShouldContain(oneComponentEntity);
manager.Systems.Single(p => p.System == oneComponentSystem).Entities.ShouldContain(twoComponentEntity);
manager.Systems.Single(p => p.System == twoComponentSystem).Entities.ShouldContain(twoComponentEntity);
manager.Systems.Single(p => p.System == twoComponentSystem).Entities.ShouldNotContain(oneComponentEntity);
}