ConferenceTest.cs

var conference = new Conference("CodeMash");
var attendee = new Attendee("Bob", "Joe") { Email = "bob@bob.com" };
attendee.RegisterFor(conference);

fixture.SaveAll(conference, attendee);

var model = new ConferenceEditModel {
  Id = conference.Id,
  Name = "BUILD",
  Attendees = new[] {
    new ConferenceEditModel.AttendeeModel {
      Id = attendee.Id,
      FirstName = "George",
      LastName = "Smith",
      Email = "foo@foo.com"
    }
  }
};

var controller = fixture.CreateInstance<ConferenceController>();

var result = controller.Edit(model);
fixture.CommitTransaction();

conference = fixture.GetById<Conference>(conference.Id);

conference.Name.ShouldEqual(model.Name);

attendee = fixture.GetById<Attendee>(attendee.Id);

attendee.FirstName.ShouldEqual(model.Attendees[0].FirstName);
attendee.LastName.ShouldEqual(model.Attendees[0].LastName);
attendee.Email.ShouldEqual(model.Attendees[0].Email);

result.ShouldBeRedirectTo<ConferenceController>(c => c.Index(null), "Default");

I put this comment in on the blog, but just to repeat it...

How does the assertion on line 33 pass? Your'e setting the attendee email address with a setter, and there's no "save" on the object afterwards. How can this test pass?