public void AddShiftMissingEmployeeId()
{
ProposedShift proposedShift = new ProposedShift()
{
dateTime = new DateTimeOffset(),
ShiftId = new Guid()
};
var mockRepository = new Mock <INowRepository>();
var controller = new ScheduleController(mockRepository.Object);
var response = controller.AddShift(proposedShift);
Assert.Equal("Invalid Data", response.Value);
}