public void Copy_Should_return_different_instance() { using World world = new(); EntityQueryBuilder builder = world.GetEntities().WithEither <bool>().WithoutEither <double>().With((in bool b) => b); EntityQueryBuilder copy = builder.Copy(); Check.That(copy).IsNotEqualTo(builder); using EntitySet s1 = builder.With <int>().AsSet(); using EntitySet s2 = copy.Without <int>().AsSet(); Entity e = world.CreateEntity(); Entity e1 = world.CreateEntity(); Entity e2 = world.CreateEntity(); e.Set(false); e1.Set(true); e1.Set(42); e2.Set(true); Check.That(s1.GetEntities().ToArray()).ContainsExactly(e1); Check.That(s2.GetEntities().ToArray()).ContainsExactly(e2); }