Visual Studio中的PrivateObject [英] PrivateObject in Visual Studio

问题描述

我正在使用Visual Studio 2019，并且在MSTest测试项目(.NET Core)中尝试使用PrivateObject测试受保护的方法.

I am using Visual Studio 2019 and in an MSTest Test Project (.NET Core) I am trying to use PrivateObject to test a protected method.

例如，我正在尝试执行以下操作

For example, I'm trying to do something like following

PrivateObject private= new PrivateObject(new Color())

但是出现以下错误

找不到PrivateObject，是您缺少using指令还是程序集引用?

PrivateObject could not be found are you missing a using directive or an assembly reference?

我也包括在内

using Microsoft.VisualStudio.TestTools.UnitTesting;

我认为应该包括PrivateObject的

.

which I thought would include PrivateObject.

有什么想法吗?

推荐答案

我认为PrivateObject在.Net Core中不存在. 您可以使用这些扩展来调用非公共成员.

I think PrivateObject does not exist in .Net Core. You can use these extensions to invoke non public members.

public static T CallNonPublicMethod<T>(this object o, string methodName, params object[] args)
        {
            var type = o.GetType();
            var mi = type.GetMethod(methodName, System.Reflection.BindingFlags.NonPublic | System.Reflection.BindingFlags.Instance);

            if (mi != null)
            {
                return (T)mi.Invoke(o, args);
            }

            throw new Exception($"Method {methodName} does not exist on type {type.ToString()}");
        }

public static T CallNonPublicProperty<T>(this object o, string methodName)
        {
            var type = o.GetType();
            var mi = type.GetProperty(methodName, System.Reflection.BindingFlags.NonPublic | System.Reflection.BindingFlags.Instance);

            if (mi != null)
            {
                return (T)mi.GetValue(o);
            }

            throw new Exception($"Property {methodName} does not exist on type {type.ToString()}");
        }

您可以像这样使用它们:

And you can use them like this:

var color= new Color();
var result= color.CallNonPublicMethod<YourReturnType>(YourMethodName, param1, param2, ... param n);

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