public void Guid_based_entity_subclass_may_change_identity()
{
var tester = new GuidIdentityEntityTester();
Assert.That(tester.Id, Is.Not.EqualTo(GuidFactory.One), "It's identity should be other than one");
tester.SetId(GuidFactory.One);
Assert.That(tester.Id, Is.EqualTo(GuidFactory.One));
}