将Sub包装为函数以在Lambda中使用 [英] Wrap Sub as Function for use in Lambda

问题描述

我对VB9和Moq有问题.

I have a problem with VB9 and Moq.

我需要在Sub上调用验证.像这样:

I need to call a verify on a Sub. Like so:

logger.Verify(Function(x) x.Log, Times.AtLeastOnce)

我的记录器如下:

Public Interface ILogger
    Sub Log()
End Interface

但是对于VB，这是不可能的，因为Log方法是Sub，因此不会产生值.

But with VB this is not possible, because the Log method is a Sub, and thereby does not produce a value.

我不想将方法更改为函数.

I don't want to change the method to be a function.

解决此限制的最干净的方法是什么?有什么方法可以像下面这样将Sub作为函数包装?

Whats the cleanest way of working around this limitation and is there any way to wrap the Sub as a Function like the below?

logger.Verify(Function(x) ToFunc(AddressOf x.Log), Times.AtLeastOnce)

我已经尝试过了，但是我得到了:

I have tried this, but i get:

Lambda参数不在范围内

Lambda Parameter not in scope

推荐答案

VB10允许使用Lambada Subs.

VB10 allows for the usage of Lambada Subs.

您是否尝试过一个简单的包装器，例如:

Have you tried a simple wrapper, such as:

Public Function Wrapper(source as Action) as Boolean  
    source.Invoke()   
    Return True 
End Function

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