public EmployeesServiceTests()
        {
            var services = new ServiceCollection();

            services.AddScoped <IUnitOfWork, UnitOfWork>();
            this._context = ContextMock.Seed();

            var mappingConfig = new MapperConfiguration(mc =>
            {
                mc.AddProfile(new SettingAutomapper());
            });

            this._mapper = mappingConfig.CreateMapper();
            services.AddSingleton(_mapper);
        }