public void AddTaskResultDisplayCandidateIfCandidateExists()
        {
            //Arrange
            Candidate candidate = new Candidate {
                CandidateID = 1, FirstName = "Foo", LastName = "Bar", PhoneNumber = 11111111, Test = null
            };

            _context.Candidates.Add(candidate);
            _context.SaveChanges();
            AddTaskResultLimits(_context);

            //Act
            IActionResult result = _sut.AddTaskResult(1);

            //Act
            ViewResult viewResult      = Assert.IsType <ViewResult>(result);
            var        candidateExists = _context.Candidates.FirstOrDefault(x => x.CandidateID == 1);

            Assert.NotNull(candidateExists);
        }