使用Mock对C#中的更新方法进行单元测试 [英] Unit test for update method in C# using Mock

问题描述

我正在尝试为我的处理器"类编写单元测试，但我遇到两个问题

I am trying to write a unit test for My Processor class I have two problems

• 我不知道如何仅测试我的方法. 这是我的处理器

• I do not know how to test my Methods Only. this is my processor

OrderProcessor类

 public  class OrderProcessor
        { 
     public   void Process(CustomersOrder order)
            {
               var oldOrder = _repository.GetOldorderId(order.Code.Value);
                if (oldOrder != 0)
                {
                    updateOrder(order);
                }
                else
                {
                    SaveOrder(order);
}
    }
private  void updateOrder(CustomersOrder order)
            {

                _repository.UpdateOrder(order);

            }

            private  void SaveOrder(CustomersOrder order)
            {
                _repository.SaveOrder(order);
            }
        }
    }

存储库类

  public  class Repository : IRepository
        {
            private static PracticeEntities4 _context;

            public Repository(PracticeEntities4 context)
            {
                _context = context;
            }

            public int GetOldCustomerId( int customerCode)
            {
                var CuID= _context.Customers.First(e => e.Code == customerCode);
                return CuID.Id;
            }



            public int GetOldorderId(int orderCode)
            {
                var oldOrder = _context.CustomersOrders.FirstOrDefault(e => e.Code == orderCode);

                return oldOrder.Id;
            }

            public void SaveCustomer(Customer customer)
            {
                _context.Customers.Add(customer);
                _context.SaveChanges();
            }

            public void SaveOrder(CustomersOrder order)
            {
                _context.CustomersOrders.Add(order);
                _context.SaveChanges();
            }

            public void UpdateOrder(CustomersOrder order)
            {

                _context.CustomersOrders.AddOrUpdate(order);
                _context.SaveChanges();
            }


        }

这是我的单元测试，我不知道如何解决它，确切的问题在哪里，我也想测试方法.

and this is My unit test I don't know how to fix it and where is the problem exactly and also I want to test the Methods too.

UnitTests类

    [TestClass]
       public class OrderProcessorTest
        {
          [ClassInitialize]   
            {...}
            [TestInitialize]
            public void TestInitialize()
            {
             ....
            }
            [TestMethod]
            public void Customer_OrderProcess()
            {
                //Arange
              Mock<IRepository> mock= new Mock<IRepository>();

                //Act
                mock.Setup(e => e.GetOldCustomerId(1001)).Returns(3);
                mock.Setup(e => e.GetOldStoreId(200)).Returns(3);       
                var dtos = OrderDeserializer.Deserialize(path);
                var dto = dtos.First(e => e.Code == 300);
                OrderBuilder builder = new OrderBuilder(mock.Object);
                builder.OrderBuild(dto);
                //Asset
                Assert.AreEqual(0, _orders.Count);
}
}

订单生成器类

public class OrderBuilder
    {
        public IRepository _repository { get; set; }

        public OrderBuilder(IRepository repository)
        {
            _repository = repository;
        }

        public CustomersOrder OrderBuild(OrderDto dto)
        {     
            var oldStoreId = _repository.GetOldStoreId(dto.StoreCode);
            var oldCustomerId = _repository.GetOldCustomerId(dto.CustomerCode);
            return new CustomersOrder()
            {
                OrderDate = Convert.ToDateTime(dto.OrderDate),
                OrderStatus = dto.OrderStatus,
                DeliveryDate = Convert.ToDateTime(dto.DeliveryDate),
                CustomerId = oldCustomerId,
                StoreId = oldStoreId,
                Code = dto.Code
            };
        }
    }

推荐答案

在您的代码中，我看到正在进行各种模拟和初始测试设置，而没有明确的测试意图. /em>

In your code I see that there are all sorts of Mocking and Initial test setups that is taking place without a clear intention on what to test.

测试没有其外部依赖项

Tests a unit of an application without its external dependencies

使重构更快，并确保您不破坏代码的现有部分

• 我们首先需要对代码进行重构，然后再进行单元测试.模块化是关键
• 通过使用Interfaces删除代码中的紧耦合
• 通过方法参数，构造函数，属性注入依赖项，或使用依赖注入
• 仅当处理外部依赖项时，才考虑使用Mock对象.

• 在[TestMethod]中，我们将测试分为3类安排->行为->声明

• We first need to re-factor the code before we do unit tests. Modularity is the key
• By using Interfaces remove the tight couplings in the code
• Inject the dependency via method parameters, constructor, properties or use Dependency Injection
• Consider using Mock objects, as a good practice, only when dealing with external dependency.

• In the [TestMethod] we organize the tests into 3 categories Arrange -> Act -> Assert

示例:

//Arrange 
var res = new Reservation();

//Act
var op = res.Method(new User{IsAdmin=true});

// Assert
Assert.IsTrue(op);

TestProjectName:    [InserProjectName].UnitTests
测试类:        [InsertClassName]Tests
TestMethod::        [MethodYourTesting]_[Scenario]_[ExpectedBehavior]

TestProjectName:     [InserProjectName].UnitTests
TestClasses:         [InsertClassName]Tests
TestMethod:         [MethodYourTesting]_[Scenario]_[ExpectedBehavior]

我已经创建了一个尽可能接近您问题的Console应用 (减去DBContext)可以复制到PC上以了解 各个部分.
所有域类都属于一个域 文件是为了提高可测试性，以便重现.

I have created a Console app as close as possible to your problem (minus the DBContext) that you can replicate on your PC to understand the various portions.
All the domain classes are part of one single file for the sake of testability to reproduce faster.

控制台应用程序项目

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace StackOrderProcessor
{

    public class CustomersOrder
    {
        public OrderDto Order { get; set; }
        public  List<CustomersOrder> CustomersOrders = new List<CustomersOrder>();
        public DateTime OrderDate { get; set; }
        public string OrderStatus { get; set; }
        public int CustomerID { get; set; }
        public int Code { get; set; }
        public int ID { get;  set; }
    }

    public class Customer
    {
        public OrderDto Order { get; set; }
        public  List<Customer> Customers = new List<Customer>();
        public int Code { get; set; }
        public int ID { get; set; }

    }
    public class OrderDto
    {
        public DateTime OrderDate   { get; set; }

        public int CustomerCode { get; set; }
        public string OrderStatus { get; set; }
        public int Code { get; set; }

    }

    public interface IRepository
    {
        int GetOldCustomerId(int customerCode);
        int GetOldOrderId(int orderCode);
        void SaveCustomer(Customer customer);
        void SaveOrder(CustomersOrder order);
    }


    public class Repository : IRepository
    {
        private readonly Customer _cust;
        private readonly CustomersOrder _custOrder;

        public Repository(Customer cust, CustomersOrder custOrder )
        {
            _cust = cust;
            _custOrder = custOrder;
        }

        public int GetOldCustomerId(int customerCode)
        {

            var cuId = _cust.Customers.First(e => e.Code == customerCode);
            return cuId.ID;
        }

        public int GetOldOrderId(int orderCode)
        {
            var oId = _custOrder.CustomersOrders.FirstOrDefault(e => e.Code == orderCode);
            return oId.ID;
        }

        public void SaveCustomer(Customer customer)
        {

            _cust.Customers.Add(customer);

        }

        public void SaveOrder(CustomersOrder order)
        {
            _custOrder.CustomersOrders.Add(order);
        }
    }

    public class OrderProcess
    {
        private readonly IRepository _repository;

        public OrderProcess(IRepository repository)
        {
            _repository = repository;
        }

        public void Process(CustomersOrder order)
        {
            var oldOrder = _repository.GetOldOrderId(order.Code);
            if (oldOrder == 0)
                _repository.SaveOrder(order);
        }
    }

    public class OrderBuilder
    {
        private readonly IRepository _repository;

        public OrderBuilder(IRepository repository)
        {
            _repository = repository;
        }

        public CustomersOrder OrderBuild(OrderDto dto)
        {

            var oldCustomerId = _repository.GetOldCustomerId(dto.CustomerCode);
            return new CustomersOrder()
            {
                Order = dto,
                OrderDate = Convert.ToDateTime(dto.OrderDate),
                OrderStatus = dto.OrderStatus,
                ID = oldCustomerId,
                CustomerID = oldCustomerId,

                Code = dto.Code
            };
        }
    }


    class Program
    {
        static void Main(string[] args)
        {
            var cust = new Customer();
            var custOrder = new CustomersOrder();

            #region PopulatingCustomer
            //Populating OrderDto
            var dto1 = new OrderDto { Code = 1, CustomerCode = 1, OrderDate = DateTime.Now.Date, OrderStatus = "OK" };
            //Populating Customer
            var customerList = cust.Customers = new List<Customer>();
            var customerOrderList = custOrder.CustomersOrders = new List<CustomersOrder>();

            var customer1 = new Customer
            {
                Code = 1,
                ID = 1, Order=dto1
            };
            var customer2 = new Customer
            {
                Code = 2,
                ID = 2,

            };

            customerList.Add(customer1);
            customerList.Add(customer2);
            #endregion

            #region PopulatingCustomerOrder

            var customersOrder1 = new CustomersOrder { Code = 1, CustomerID = 1, ID = 1, Order = dto1, OrderDate = dto1.OrderDate, OrderStatus = dto1.OrderStatus };
            customerOrderList.Add(customersOrder1);
            #endregion

            #region InvokingMethods
            //IRepository
            IRepository IRepo = new Repository(cust,custOrder);

            //OrderProcessor
            var orderProcesor = new OrderProcess(IRepo);

            //OrderBuilder
            var dto2 = new OrderDto { Code = 2, CustomerCode = 2, OrderDate = DateTime.Now.Date, OrderStatus = "OK" };
            var oBuilder = new OrderBuilder(IRepo);
           var newCustOrder =  oBuilder.OrderBuild(dto2);
            customerOrderList.Add(newCustOrder);
            #endregion
            Console.Read();

        }
    }
}

UnitTest项目

using System;
using System.Collections.Generic;
using Microsoft.VisualStudio.TestTools.UnitTesting;
using StackOrderProcessor;

namespace StackOrderProcessor.UnitTests
{
    [TestClass]
    public class RepositoryTests
    {
        [TestMethod]
        public void GetOldCustomerId_WhenCalled_ReturnsOId()
        {
            //Arrange
            var cust = new Customer();
            var custOrder = new CustomersOrder();

            IRepository repo = new Repository(cust,custOrder);
            var customerList = cust.Customers = new List<Customer>();

            var dto1 = new OrderDto { Code = 1, CustomerCode = 1, OrderDate = DateTime.Now.Date, OrderStatus = "OK" };
            var customer1 = new Customer
            {
                Code = 1,
                ID = 1,
                Order = dto1
            };
            var customer2 = new Customer
            {
                Code = 2,
                ID = 2,

            };

            customerList.Add(customer1);
            customerList.Add(customer2);


            //Act
            repo.GetOldCustomerId(1);


            //Assert
            Assert.AreEqual(1, 1); //Test will Pass as we have a customer of Code  1

        }

        [TestMethod]
        //MethodName_Scenario_Expectedbehavior
        public void SaveCustomer_WhenCalled_AddsNewCustomer()
        {

            var cust = new Customer();
            var custOrder = new CustomersOrder();

            IRepository repo = new Repository(cust, custOrder);
            var customerList = cust.Customers = new List<Customer>();

            var dto1 = new OrderDto { Code = 1, CustomerCode = 1, OrderDate = DateTime.Now.Date, OrderStatus = "OK" };
            var customer1 = new Customer
            {
                Code = 1,
                ID = 1,
                Order = dto1
            };
            var customer2 = new Customer
            {
                Code = 2,
                ID = 2,

            };

            customerList.Add(customer1);
            customerList.Add(customer2);
            //Act

            var custToSave = new Customer
            {
                Code = 3,
                ID = 3,
                Order = null
            };
            repo.SaveCustomer(custToSave);

            //Assert
            Assert.AreEqual(3, customerList.Count);


        }

    }

    [TestClass]
    public class OrderProcessor1Tests
    {
        [TestMethod]
        public void Process_WhenOrderIsZero_AddsNewCustomerOrder()
        {
            //Arrange
            var cust = new Customer();
            var custOrder = new CustomersOrder();
            var customerOrderList = custOrder.CustomersOrders = new List<CustomersOrder>();

            IRepository repo = new Repository(cust, custOrder);

            var orderProcessor = new OrderProcess(repo);


            var dto1 = new OrderDto { Code = 1, CustomerCode = 1, OrderDate = DateTime.Now.Date, OrderStatus = "OK" };

            var custOrder1 = new CustomersOrder { ID = 1, Code = 1, CustomerID = 1, Order = dto1, OrderDate = dto1.OrderDate, OrderStatus = dto1.OrderStatus };

            customerOrderList.Add(custOrder1);


            //Act
            orderProcessor.Process(custOrder1);

            //Assert
            Assert.AreEqual(1, customerOrderList.Count);
        }
    }
}

注意:请确保在StackOrderProcessor.UnitTests

Note: Make sure to add reference of StackOrderProcessor in StackOrderProcessor.UnitTests

您仍然需要更好地组织单元测试方法，这只是出于演示目的，我希望现在概念更加清晰

这篇关于使用Mock对C#中的更新方法进行单元测试的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！