public async Task Can_Cleare_Content() { var options = new DbContextOptionsBuilder <SportStoreDbContext>() .UseInMemoryDatabase(databaseName: "Can_Cleare_Content") .Options; var cardItem1 = new CardItem() { Product = new Product() { Id = 1, Price = 5.0M, Name = "P1" }, Quantity = 1, IsDeleted = false }; var cardItem2 = new CardItem() { Product = new Product() { Id = 2, Price = 5.0M, Name = "P2" }, Quantity = 2, IsDeleted = false }; var cardItem3 = new CardItem() { Product = new Product() { Id = 3, Price = 5.0M, Name = "P2" }, Quantity = 2, IsDeleted = false }; using (var context = new SportStoreDbContext(options)) { await context.CardItems.AddAsync(cardItem1); await context.CardItems.AddAsync(cardItem2); await context.CardItems.AddAsync(cardItem3); await context.SaveChangesAsync(); var service = new CardService(context); await service.Clear(); var cleared = await context .CardItems .ToListAsync(); var clearedCount = cleared.Where(c => c.IsDeleted).Count(); Assert.Equal(3, clearedCount); } }