public void DeleteSummaryPreview() { var summary = new SummaryDerived(Guid.NewGuid(), _agency.Id, Guid.NewGuid(), ModuleType.Incident, CaseNumber, null); _case.BindSummary(summary); _summariesUnitOfWork.Setup(item => item.Find <Summary>(It.IsAny <Guid>(), TrackingMode.Automatic, ThrowIf.Anything)) .Returns(_case.Summaries.FirstOrDefault()); var deletedPreview = _deleteService.DeleteSummaryPreview(_case.Id); deletedPreview.Should().NotBeNull(); deletedPreview.Summaries.Should().HaveCount(1); }