public When_EmployerService_Is_Called_To_Get_Opportunity_Employer()
{
var employerRepository = Substitute.For <IRepository <Domain.Models.Employer> >();
_opportunityRepository = Substitute.For <IOpportunityRepository>();
_opportunityRepository.GetSingleOrDefaultAsync(Arg.Any <Expression <Func <Domain.Models.Opportunity, bool> > >(),
Arg.Any <Expression <Func <Domain.Models.Opportunity, FindEmployerViewModel> > >())
.Returns(new FindEmployerViewModelBuilder().BuildWithEmployer());
var employerService = new EmployerService(employerRepository, _opportunityRepository, Substitute.For <IMapper>(), Substitute.For <IValidator <CrmEmployerEventBase> >(),
Substitute.For <IMessageQueueService>());
_result = employerService.GetOpportunityEmployerAsync(1, 2).GetAwaiter().GetResult();
}