从模拟方法返回模拟 [英] Return a Mock from a Mocked method

问题描述

我不确定该怎么做.

鉴于我有

public interface IFactory<T> where T : new()
{
    IWrapper<T> GetT(string s);
}

public interface IWrapper<out T> where T : new()
{
    void Execute(Action<T> action);
}

当我这样做

public class MoqTest
{
    public void test()
    {
        Mock<IWrapper<basicClass>> wrapperMock = new Mock<IWrapper<basicClass>>();
        Mock<IFactory<basicClass>> factoryMock = new Mock<IFactory<basicClass>>()
            .Setup(p => p.GetT(It.IsAny<string>()))
            .Returns(wrapperMock.Object);
    }
}

我明白了

无法隐式转换类型 Moq.Language.Flow.IReturnsResult<TestNamespace.IFactory<TestNamespace.basicClass>> 到Moq.Mock<TestNamespace.IFactory<TestNamespace.basicClass>>.一个 存在显式转换(您是否缺少演员表?)

Cannot implicitly convert type Moq.Language.Flow.IReturnsResult<TestNamespace.IFactory<TestNamespace.basicClass>> to Moq.Mock<TestNamespace.IFactory<TestNamespace.basicClass>>. An explicit conversion exists (are you missing a cast?)

请注意，这些只是模拟的示例对象.

Note that these are just mocked example objects.

似乎不认为返回类型等效.一个是IReturnResult，另一个是Moq.Mock

It seems it doesn't consider the return type equivalent. One being a IReturnResult, the other a Moq.Mock

推荐答案

您的问题基本上是，您将调用Returns方法的结果分配给factoryMock变量.

Your problem basically is that you are assigning the result of invoking the Returns method to the factoryMock variable.

您要先创建模拟并将其分配给factoryMock变量，然后按如下所示设置模拟:

You want to first create the mock and assign it to the factoryMock variable and then set the mock up like this:

Mock<IWrapper<basicClass>> wrapperMock = new Mock<IWrapper<basicClass>>();
Mock<IFactory<basicClass>> factoryMock = new Mock<IFactory<basicClass>>();

factoryMock
    .Setup(p => p.GetT(It.IsAny<string>()))
    .Returns(wrapperMock.Object);

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