public void can_get_version_when_it_is_empty_always_null() { theTracker.VersionFor <StringDoc, string>(stringDoc.Id) .ShouldBeNull(); theTracker.VersionFor <IntDoc, int>(intDoc.Id) .ShouldBeNull(); theTracker.VersionFor <LongDoc, long>(longDoc.Id) .ShouldBeNull(); theTracker.VersionFor <GuidDoc, Guid>(guidDoc.Id) .ShouldBeNull(); }