public void OneTimeSetUp() { DbContextOptions <ProjectContext> options = new DbContextOptionsBuilder <ProjectContext>() .UseInMemoryDatabase(databaseName: "Test_DB") .Options; ProjectContext context = new ProjectContext(options); orderService = new OrderService(context); _crud = new CRUDManagerOrder(orderService); testProduct = new Product() { ProductId = 1, Name = "testProduct", Price = 5, Url = "testUrl" }; testCustomer = new Customer() { CustomerId = 1, UserId = 1 }; }