Question

我正处于编写单元测试用例来测试代码的情况，我遇到过一种情况，我无法为PrivateObject和PrivateType创建对象。我搜索了很多，但没有找到任何帮助。最后提出问题寻求帮助。我正在使用MSFakes测试。

以下是我的示例代码：

public class A
{
    //this class is not having default constructor and I can't modify the code as well.
    public A(int id){
    //some code
    }

    private void MethodPrivateA(int id){
       //some code
    }


    private static void MethodPrivateStaticB(int id){
       //some code
    }

}

现在我想测试这两种方法。

如果我写下面的代码，我在运行时遇到错误，而不是编译时间：

[TestClass]
Class TestA
{
    [TestMethod]
    public void CheckMethodATest()
    {

     //my some arrange data

     //here I'm stuck to invoke the method as object is not created
     PrivateObject obj = new PrivateObject(typeof(A)); //here at runtime throws error it does not found default constructor for the class A 
     obj.Invoke("MethodPrivateA", new Object[1]{1});
    }
    //my some assertion code
}

//Please ignore any typo error in the code in case if they exists as I have written code directly over here. It is more conceptual one.

PrivateType也是如此。那么如果类没有默认构造函数，我怎么能创建对象呢？提前谢谢。

Answer 1

PrivateObject构造函数接受将传递给Type构造函数的可变数量的参数。 See documentation

PrivateObject obj = new PrivateObject(typeof(A), 1);

您还可以pass initialized object到PrivateObject。

PrivateObject obj = new PrivateObject(new A(1));

C＃Reflection - 如果类没有默认构造函数，如何创建PrivateObject对象或PrivateType对象？

1 个答案: