public void Changing_product_name_should_raise_domain_event()
{
const string oldName = "Widget";
const string newName = "Gadget";
var product = new Product();
IDomainEvent @event = null;
using (DomainEvent.TestWith(e => { @event = e; }))
{
product.Name = oldName;
@event.ShouldBeNull(); // event should not be raised on initial set.
product.Name = newName;
}
var productNameChangedEvent = @event as ProductNameChangedEvent;
productNameChangedEvent.ShouldNotBeNull();
productNameChangedEvent.OldProductName.ShouldEqual(oldName);
productNameChangedEvent.NewProductName.ShouldEqual(newName);
}