GetById() public method

public GetById ( INfieldConnection connection, string id ) : Interviewer
connection INfieldConnection
id string
return Nfield.Models.Interviewer
        public void TestGetById_IdNotPresent_ReturnsNull()
        {
            List<Interviewer> list = new List<Interviewer>();

            var mockedConnection = new Mock<INfieldConnection>();
            var mockedService = new Mock<INfieldInterviewersService>();

            mockedConnection.Setup(x => x.GetService<INfieldInterviewersService>())
                    .Returns(mockedService.Object);
            mockedService.Setup(x => x.QueryAsync())
                .Returns(Task.Factory.StartNew(() => list.AsQueryable()));

            var target = new InterviewerManager();
            var result = target.GetById(mockedConnection.Object, "NotFound");

            Assert.Null(result);
        }