public void With_Should_return_EntitySetBuilder()
{
using World world = new World();
EntityRuleBuilder builder = world.GetEntities();
Check.That(builder.WithEither <bool>().With <int>()).IsEqualTo(builder);
}
public void Copy_Should_return_different_instance()
{
using World world = new World();
EntityRuleBuilder builder = world.GetEntities();
EntityRuleBuilder copy = builder.WithEither <bool>().Copy();
Check.That(copy).IsNotEqualTo(builder);
}