public void AddDomainEvent()
{
var ar = new TestAggregateRoot();
ar.DomainEvents.ShouldBeEmpty();
ar.AddDomainEvent(1);
ar.DomainEvents.ShouldContain(1);
ar.DomainEvents.ShouldHaveSingleItem();
ar.ClearDomainEvents();
ar.DomainEvents.ShouldBeEmpty();
}