public void AddCompletionDetailsPost_GivenAssessmentId_AssessmentMustBeMarkedComplete() { var assessmentId = Guid.NewGuid(); var model = new TerminatedViewModel { AssessmentId = assessmentId }; _assessmentController.AddCompletionDetails(model); A.CallTo(() => _workflowHandler.CompleteAssessment(assessmentId)).MustHaveHappened(Repeated.Exactly.Once); }