使用反射进行测试（PrivateObject）

发布于 2024-12-19 16:08:51 字数 1002 浏览 2 评论 0原文

我有一个小但相当烦人的问题。

我正在使用 PrivateObject 进行一些测试来访问类中的各种方法。这一切都很好。但是，当方法签名包含“ref”时，ref 关键字似乎没有任何效果。

private bool NewDeviceArrivedDeviceAtWorkcenter(ThreadStartArgs args, ref Device deviceAtStation)
{
//..SomeCode
     deviceAtStation = null;
//...Method to test
}

这个测试失败了..

 [TestMethod]
        public void CheckForDeviceAtWorkcenterNoDeviceFound()
        {
Initialization omitted

var device = new Device();

            var result = accessor.Invoke("NewDeviceArrivedDeviceAtWorkcenter", 
                new []
                    {
                        typeof (ThreadStartArgs), 
                        typeof (Device).MakeByRefType()
                    }, 
                    new object[] 
                    {
                        threadStartArgs, 
                        device
                    });

            Assert.IsNull(device);
}

问题：为什么测试方法中的device obj没有设置为null？

任何帮助表示赞赏

亲切的问候卡斯滕

原文

I have a minor but rather annoying problem.

I am doing some tests using a PrivateObject to access various methods in a class. This all works fine. However when the method signature contains "ref" the ref keyword does not seem to have any effect.

private bool NewDeviceArrivedDeviceAtWorkcenter(ThreadStartArgs args, ref Device deviceAtStation)
{
//..SomeCode
     deviceAtStation = null;
//...Method to test
}

This test is failing..

 [TestMethod]
        public void CheckForDeviceAtWorkcenterNoDeviceFound()
        {
Initialization omitted

var device = new Device();

            var result = accessor.Invoke("NewDeviceArrivedDeviceAtWorkcenter", 
                new []
                    {
                        typeof (ThreadStartArgs), 
                        typeof (Device).MakeByRefType()
                    }, 
                    new object[] 
                    {
                        threadStartArgs, 
                        device
                    });

            Assert.IsNull(device);
}

Question: Why is device obj in the test method not set to null?

Any help appreciated

Kind Regards
Carsten

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情域 2024-12-26 16:08:51

通过传递到 Invoke 的参数数组来返回。

[TestMethod]
public void CheckForDeviceAtWorkcenterNoDeviceFound()
{ 
   //Initialization omitted for publicObject, threadStartArgs, device

   Type[] myTypes = new Type[] {typeof (ThreadStartArgs), 
                                typeof (Device).MakeByRefType() };
   object[] myArgs = new object[] { threadStartArgs, device };
   string sMethod = "NewDeviceArrivedDeviceAtWorkcenter";

   //Invoke method under test
   bool bResult = (bool)publicObject.Invoke(sMethod, myTypes, myArgs);

   Device returnDevice = (Device)myArgs[1];

   Assert.IsNull(returnDevice);
}

The return is made through the argument array passed into the Invoke.

[TestMethod]
public void CheckForDeviceAtWorkcenterNoDeviceFound()
{ 
   //Initialization omitted for publicObject, threadStartArgs, device

   Type[] myTypes = new Type[] {typeof (ThreadStartArgs), 
                                typeof (Device).MakeByRefType() };
   object[] myArgs = new object[] { threadStartArgs, device };
   string sMethod = "NewDeviceArrivedDeviceAtWorkcenter";

   //Invoke method under test
   bool bResult = (bool)publicObject.Invoke(sMethod, myTypes, myArgs);

   Device returnDevice = (Device)myArgs[1];

   Assert.IsNull(returnDevice);
}

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