如何模拟通过反射找到的类?

待测试组件中:

namespace MyApp.Workers
{
    internal interface IWork { void DoWork() }

    internal class RealWork : IWork { public void DoWork() { /* impl omitted */ } }
}

namespace MyApp.Helpers
{
    internal static class ClassFetcher
    {
        public static Type GetWorkClass(string className)
        {
            string qualifiedClassName = typeof(IWork).Namespace + "." + className;
            cls = Type.GetType(qualifiedClassName);
            if (cls == null)
                throw new Exception($"Can't find class \"{className}\".");
            if (!typeof(IWork).IsAssignableFrom(cls))
                throw new Exception($"The class \"{className}\" doesn't implement IWork.");
        }
    }
}

在测试组件中:

// Usings omitted...

namespace MyApp.Workers
{
    // Class that does implement IWork.
    public class TestWork : IWork { public void DoWork() {} }

    // Class that does not implement IWork.
    public class TestNoWork { }
}

namespace MyApp_Test.Helpers
{
    [TestClass]
    public class UnitTestClassFetcher
    {
        [TestMethod]
        public void FindsWorkClass()
        {
            ClassFetcher.GetWorkClass("TestWork");
        }

        [TestMethod]
        public void DoesNotAcceptNoWorkClass()
        {
            ClassFetcher.GetWorkClass("TestNoWork");
        }
    }
}

上 GetWorkClass Type.GetType(...) 呼叫内部 GetWorkClass公司 返回null。如果我通过 "RealWork" 从测试方法来看,它是有效的。

那么,我如何启用

欢迎有无第三方框架、工具和插件的建议。

根据@LasseV的评论。Karlsen和@dymanoid的标记答案,我只是改变了测试方法的代码如下:

[TestMethod]
public void FindsWorkClass()
{
    string namespace = typeof(IWork).Namespace;
    string className = typeof(TestWork).AssemblyQualifiedName.Substring(namespace.Length + 1);
    ClassFetcher.GetWorkClass(className);
}