MOQ - 如何手动创建使用SetupGet / SetupSet一个支持的属性？ [英] MOQ - how to manually create a backing property using SetupGet/SetupSet?

问题描述

我知道我们可以称之为 SetupAllProperties（）来自动创建的支持性能。但是，这是过于严格，因为它不会让我在的getter / setter方法执行额外的代码。例如，我想创建一个moq'd二传手调用其他方法/事件/逻辑。

I know we can call SetupAllProperties() to automatically create backing properties. But this is too restrictive, because it doesn't allow me to execute additional code in the getter/setters. For example, I'd like to create a moq'd setter that invokes some other method/event/logic.

下面的代码示例重现问题

The Following code sample reproduces the issue

public interface IA
{
    int B { get; set; }
};

class Test
{
    [Test]
    public void BackingPropertyTest()
    {
        int b = 1;

        var mockA = new Mock<IA>();
        //mockA.SetupAllProperties();
        mockA.SetupGet(m => m.B).Returns(b);
        mockA.SetupSet(m => m.B).Callback(val => b = val);

        mockA.Object.B = 2;
        Assert.AreEqual(2, b);              // pass. b==2
        Assert.AreEqual(2, mockA.Object.B); // fail.  mockA.Object.B==1, instead of 2
    }
}

由于吸气剂是设置返回局部变量的值（我想现在是一个捕获变量），我希望看到 mockA.Object.B == 2 。但是，相反，它是 1 。

Since the getter is setup to return the value of the local variable (which I guess is now a captured variable), I'd expect to see mockA.Object.B == 2. But instead, it's 1.

我在这里从根本上失去了一些东西？或者这是一个错误最小起订量？我跑起订量4.0.10501.6

Am I fundamentally missing something here? Or is this a MOQ bug? I'm running MOQ 4.0.10501.6

推荐答案

这是简单的解决方案。

更改退换货（二）收益（（）=> b）相反，为了让'b'捕获的变量，而不是仅仅通过值传递给方法的变量。

Change Returns(b) to Returns(() => b) instead, in order to make 'b' a captured variable instead of just a variable passed by value to a method.

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