AutoConfiguredMoqCustomization和不可设置的属性

问题描述

如何强制使用AutoConfiguredMoqCustomization配置的AutoFixture自动模拟接口及其只读属性?

How do I force AutoFixture, that has been configured with AutoConfiguredMoqCustomization, to automatically mock interfaces and its read-only properties?

为清楚起见，让我们假设我有这样的界面:

To make things clear, let's assume I have such an interface:

public interface A {
     int Property {get;}
}

以及此类:

public class SomeClass {
     public SomeClass(A dependency) {}
}

我想要的是将dependency解析为一个模拟，该模拟将返回dependency.Property中的某些内容:

What I want is to have dependency resolved to a mock that will return something in dependency.Property:

var fixture = new Fixture().Customize(new AutoConfiguredMoqCustomization());
var sut = fixture.Create<SomeClass>(); // <- dependency passed to SomeClass' constructor will have .Property returning null

推荐答案

这是由于Moq 4.2.1502.911中引入的一个错误所致，其中SetupAllProperties覆盖了以前对仅获取属性所做的设置.

This is due to a bug introduced in Moq 4.2.1502.911, where SetupAllProperties overrides previous setups done on get-only properties.

这是一个简单的复制:

public interface Interface
{
    string Property { get; }
}

var a = new Mock<Interface>();

a.Setup(x => x.Property).Returns("test");
a.SetupAllProperties();

Assert.NotNull(a.Object.Property);

这是AutoFixture在后台创建Interface实例的操作. Moq等于或大于4.2.1502.911的版本会失败，但是Moq的版本会通过.

This is sort of what AutoFixture does behind the scenes to create an instance of Interface. This test fails with versions of Moq equal to or greater than 4.2.1502.911, but passes with lower versions.

只需在Package Manager控制台上运行它即可

Simply run this on the Package Manager Console:

install-package Moq -version 4.2.1409.1722

此错误已在此处跟踪: https://github.com/Moq/moq4/issues/196

This bug is being tracked here: https://github.com/Moq/moq4/issues/196

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