Question

我在n层架构中嘲笑实体框架。我试图模拟插入。插入有效，但是当我尝试获取插入实体的值时，我无法得到正确的值。

修改

这是的测试用例变量pat。在这种情况下，测试失败，因为关于尝试日期的断言失败。

var mockContext = new Mock<PublicAreaContext>();

//Here I mock the entity I cannot get the correct values
PaymentAttemptTrace pat = new PaymentAttemptTrace();
var mockSetPaymentAttemptTrace = new Mock<DbSet<PaymentAttemptTrace>>();
mockContext.Setup(m => m.Set<PaymentAttemptTrace>()).Returns(mockSetPaymentAttemptTrace.Object);

//Here I create a fake request 
TracePaymentAttemptRequest request = new TracePaymentAttemptRequest();
... 

//I call the facade. The facade create a PaymentAttemptTrace and insert it in the mocked db
ToolsFacade facade = new ToolsFacade(mockContext.Object);
TracePaymentAttemptResponse response = facade.TraceAutoPayPaymentAttempt(request);

//All asserts are ok, except the last one. The date remain "empty", even if is valorized correctly during the execution of the code (I have checked in debug)
Assert.IsTrue(response.Result == it.MC.WebApi.Models.ResponseDTO.ResponseResult.Success);

mockSetPaymentAttemptTrace.Verify(m => m.Add(It.IsAny<PaymentAttemptTrace>()), Times.Once());
mockContext.Verify(m => m.SaveChanges(), Times.Once());

Assert.IsTrue(pat.AttemptDate == new DateTime(2016, 07, 27, 11, 46, 24));

这是没有变量pat的测试用例。在这种情况下，测试失败（当然）因为我没有嘲笑实体！

var mockContext = new Mock<PublicAreaContext>();

//Here I create a fake request 
TracePaymentAttemptRequest request = new TracePaymentAttemptRequest();
... 

//I call the facade. The facade create a PaymentAttemptTrace and insert it in the mocked db
ToolsFacade facade = new ToolsFacade(mockContext.Object);
TracePaymentAttemptResponse response = facade.TraceAutoPayPaymentAttempt(request);

Assert.IsTrue(response.Result == it.MC.WebApi.Models.ResponseDTO.ResponseResult.Success);

mockSetPaymentAttemptTrace.Verify(m => m.Add(It.IsAny<PaymentAttemptTrace>()), Times.Once());
mockContext.Verify(m => m.SaveChanges(), Times.Once());

这里是我要测试的代码：

public TracePaymentAttemptResponse TraceAutoPayPaymentAttempt(TracePaymentAttemptRequest request)
{
    ...
    DateTime attemptDate = DateTime.Now.Date;
    if (!string.IsNullOrWhiteSpace(request.DataTentativoPagamento))
    {
        try
        {
            attemptDate = DateTime.ParseExact(request.DataTentativoPagamento, "yyyyMMddTHHmmss", System.Globalization.CultureInfo.InvariantCulture);
        }
        catch (Exception) { /* Do nothing. attemptDate = DateTime.Now.Date; */ }
    }

    PaymentAttemptTrace trace = this.CreatePaymentAttemptTraceEntity(/* All data I need to create my entity */);

    Repository<PaymentAttemptTrace> repository = new Repository<PaymentAttemptTrace>(base.Context);
    repository.Insert(trace); // <- If not mock the entity pat, here go in exception!!

    repository.SaveChanges();

    ...
}

所以我必须嘲笑pat变量，即使我在测试中没有使用它！我的测试的目的是验证attemptDate的解析是否正确。

可能是什么问题？我错过了什么？

谢谢

再次编辑 我让你看到另一个测试。这个测试有效！在这个测试中，我必须更新一个实体：

var mockContext = new Mock<PublicAreaContext>() { CallBase = true };

List<BillingCenter> billingCenters = new List<BillingCenter>()
{
    new BillingCenter() { Id = "12345600", CustomerId = "123456", PaymentMethod = PaymentMethod.Easypay }
};

var data = billingCenters.AsQueryable();

var mockSet = new Mock<DbSet<T>>();
mockSet.As<IQueryable<T>>().Setup(m => m.Provider).Returns(data.Provider);
mockSet.As<IQueryable<T>>().Setup(m => m.Expression).Returns(data.Expression);
mockSet.As<IQueryable<T>>().Setup(m => m.ElementType).Returns(data.ElementType);
mockSet.As<IQueryable<T>>().Setup(m => m.GetEnumerator()).Returns(data.GetEnumerator());

mockContext.Setup(m => m.Set<BillingCenter>()).Returns(mockSet.Object);

mockContext.Setup(x => x.SaveChanges()).Returns(1);

//Here I create a request
UpdateEasyPayFromResultPaymentRequest request = new UpdateEasyPayFromResultPaymentRequest();
...

PublicAreaFacade facade = new PublicAreaFacade(mockContext.Object);
UpdateEasyPayFromResultPaymentResponse response = facade.UpdateEasyPayFromResultPayment(request);

Assert.IsTrue(billingCenters[0].PaymentMethod == PaymentMethod.Autopay);

正如您所看到的，我使用billingCenter创建paymentMethod = Easypay ..在测试结束时，我会执行一项操作，以检查{{1}中结算中心的付款方式是否已更改}。但是我没有改变测试中的值！我在Autopay方法

中更改了它

Answer 1

这是您已经发现的另一种解决方案

//ARRANGE
bool patAdded = false;
PaymentAttemptTrace pat = null; //will assign a value to this when adding new entity

var mockSetPaymentAttemptTrace = new Mock<DbSet<PaymentAttemptTrace>>();
//setup a call back on Add to get the entity that was added to dbset
mockSetPaymentAttemptTrace
    .Setup(m => m.Add(It.IsAny<PaymentAttemptTrace>()))
    .Callback((PaymentAttemptTrace arg) => {
        pat = arg;
        padAdded = (pat != null);
    });

var mockContext = new Mock<PublicAreaContext>();
mockContext.Setup(m => m.Set<PaymentAttemptTrace>()).Returns(mockSetPaymentAttemptTrace.Object);
mockContext.Setup(x => x.SaveChanges()).Returns(1);//for when you save the added entity

//Here I create a fake request 
TracePaymentAttemptRequest request = new TracePaymentAttemptRequest();

... 

//I call the facade. The facade create a PaymentAttemptTrace and insert it in the mocked db
ToolsFacade facade = new ToolsFacade(mockContext.Object);

//ACT
TracePaymentAttemptResponse response = facade.TraceAutoPayPaymentAttempt(request);

//ASSERT
Assert.IsTrue(response.Result == it.MC.WebApi.Models.ResponseDTO.ResponseResult.Success);

mockSetPaymentAttemptTrace.Verify(m => m.Add(It.IsAny<PaymentAttemptTrace>()), Times.Once());
mockContext.Verify(m => m.SaveChanges(), Times.Once());

Assert.IsTrue(patAdded);
Assert.IsTrue(pat.AttemptDate == new DateTime(2016, 07, 27, 11, 46, 24));

Answer 2

我已经用这种方式解决了

var mockContext = new Mock<PublicAreaContext>();

//Here I mock the entity I cannot get the correct values
List<PaymentAttemptTrace> pat = new List<PaymentAttemptTrace>();
var mockSetPaymentAttemptTrace = new Mock<DbSet<PaymentAttemptTrace>>();
mockSetPaymentAttemptTrace.Setup(m => m.Add(It.IsAny<PaymentAttemptTrace>())).Callback<PaymentAttemptTrace>(list.Add);
mockContext.Setup(m => m.Set<PaymentAttemptTrace>()).Returns(mockSetPaymentAttemptTrace.Object);

mockContext.Setup(x => x.SaveChanges()).Returns(1);

//Here I create a fake request 
TracePaymentAttemptRequest request = new TracePaymentAttemptRequest();
... 

//I call the facade. The facade create a PaymentAttemptTrace and insert it in the mocked db
ToolsFacade facade = new ToolsFacade(mockContext.Object);
TracePaymentAttemptResponse response = facade.TraceAutoPayPaymentAttempt(request);

//All asserts are ok, except the last one. The date remain "empty", even if is valorized correctly during the execution of the code (I have checked in debug)
Assert.IsTrue(response.Result == it.MC.WebApi.Models.ResponseDTO.ResponseResult.Success);

mockSetPaymentAttemptTrace.Verify(m => m.Add(It.IsAny<PaymentAttemptTrace>()), Times.Once());
mockContext.Verify(m => m.SaveChanges(), Times.Once());

Assert.IsTrue(pat[0].AttemptDate == new DateTime(2016, 07, 27, 11, 46, 24));

这里的差异与我的问题相比：

List<PaymentAttemptTrace> pat = new List<PaymentAttemptTrace>();
var mockSetPaymentAttemptTrace = new Mock<DbSet<PaymentAttemptTrace>>();
mockSetPaymentAttemptTrace.Setup(m => m.Add(It.IsAny<PaymentAttemptTrace>())).Callback<PaymentAttemptTrace>(list.Add);

并且

mockContext.Setup(x => x.SaveChanges()).Returns(1);

我不喜欢这个解决方案，只是......但是它有效！我等待更好的东西！谢谢

如何模拟Entity Framework并在模拟上下文中获取新的Inserted值

2 个答案: