甚至简单的Moq代码都引发NotSupportedException [英] Even simple Moq code is throwing NotSupportedException

问题描述

我一直在努力使用Moq作为模拟框架，并复制了一些非常简单的示例代码.我一定在这里缺少真正愚蠢的东西.即使它指向Returns方法，它也会在Setup调用上引发NotSupportedException.这段代码是我的测试课程的一部分:

I've been struggling to use Moq as a mocking framework and copied some very simple example code. I must be missing something really stupid here. It throws a NotSupportedException on the Setup call, even though it points to the Returns method. This code is part of my tests class:

class Test
{
    public string DoSomethingStringy(string s)
    {
        return s;
    }
}

[TestInitialize]
public void Setup()
{
    var mock = new Mock<Test>();
    mock.Setup(x => x.DoSomethingStringy(It.IsAny<string>()))
        .Returns((string s) => s.ToLower());
}

推荐答案

您可以使用 typemock

You can mock non-virtual object with typemock isolator, and you can do so without changing your source code and quite easily.

只需为您的被测对象创建一个假实例，然后为被测方法确定新行为即可.

By just creating a fake instance of your under test object and determine a new behavior for the tested method.

例如，我为您发布的代码创建了一个测试:

For example I've created a test for the code you posted:

  [TestMethod]
        public void TestMethod1()
        {
            var mock = Isolate.Fake.Instance<Test>();
            Isolate.WhenCalled(() => mock.DoSomethingStringy(null)).DoInstead(contaxt =>
            {
                return (contaxt.Parameters[0] as string).ToLower();
            });

            var res = mock.DoSomethingStringy("SOMESTRING");

            Assert.AreEqual("somestring", res);
        } 

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