public async Task GetNotParticipantFbAsync_ShouldReturnNotParticipantFb_NotParticipantFbExists()
{
int id = 1;
List <ParticipantFeedbackVM> feedbackVMs = new List <ParticipantFeedbackVM>();
ParticipantFeedbackVM feedback = new ParticipantFeedbackVM();
List <string> fbNames = new List <string>();
fbNames.Add("Incorrectly registered");
fbNames.Add("Unexpected");
feedback.Feedback = fbNames;
feedbackVMs.Add(feedback);
_feedbackRepository.Setup(x => x.GetNotParticipatedFeedbacksForEvent(id)).ReturnsAsync(feedbackVMs);
IEnumerable <ParticipantFeedbackVM> result = await feedbackController.GetNotParticipatedFeedbacks(id);
Assert.IsNotEmpty(result);
}