public async Task CheckGettingAllAsSelectListItemAsync() { ApplicationDbContext db = GetDb(); var repository = new EfDeletableEntityRepository <Brand>(db); var service = new BrandsService(repository); var firstBrand = new Brand() { Id = Guid.NewGuid().ToString() }; var secondBrand = new Brand() { Id = Guid.NewGuid().ToString() }; var thirdBrand = new Brand() { Id = Guid.NewGuid().ToString() }; await db.Brands.AddAsync(firstBrand); await db.Brands.AddAsync(secondBrand); await db.Brands.AddAsync(thirdBrand); await db.SaveChangesAsync(); var brands = await service.GetAllAsSelectListItemAsync(); Assert.Equal(3, brands.Count()); }