public When_EmployerService_Is_Called_For_Invalid_CompanyNameAndId()
        {
            _employerRepository = Substitute.For <IRepository <Domain.Models.Employer> >();
            var opportunityRepository = Substitute.For <IOpportunityRepository>();

            _employerRepository.GetSingleOrDefaultAsync(Arg.Any <Expression <Func <Domain.Models.Employer, bool> > >(),
                                                        Arg.Any <Expression <Func <Domain.Models.Employer, Guid> > >())
            .Returns(Guid.Empty);

            var employerService = new EmployerService(_employerRepository, opportunityRepository, Substitute.For <IMapper>(), Substitute.For <IValidator <CrmEmployerEventBase> >(),
                                                      Substitute.For <IMessageQueueService>());

            _employerResult = employerService.ValidateCompanyNameAndCrmIdAsync(_employerCrmId, CompanyName).GetAwaiter().GetResult();
        }