問題描述

我們使用 ELMAH 來處理我們的 ASP.Net MVC c# 應用程序中的錯誤，并且在我們捕獲的異常中，我們正在做這樣的事情:

We're using ELMAH for handling errors in our ASP.Net MVC c# application and in our caught exceptions, we're doing something like this:

ErrorSignal.FromCurrentContext().Raise(exception);

但是當我嘗試對捕獲的異常進行單元測試時，我收到以下消息:

but when I try to unit test the caught exceptions, I get this message:

System.ArgumentNullException: Value cannot be null.
Parameter name: context

如何模擬 FromCurrentContext() 調用?有什么我應該做的嗎?

How can I mock the FromCurrentContext() call? Is there something else I should be doing instead?

僅供參考...我們目前正在使用 Moq 和 RhinoMocks.

FYI... We're currently using Moq and RhinoMocks.

謝謝！

推薦答案

由于 FromCurrentContext() 方法是一個靜態方法，你不能簡單地模擬對它的調用.你還有另外兩個選擇.

Since the FromCurrentContext() method is a static method you can't simply mock the call to it. You do have two other options.

1. 由于 FromCurrentContext() 在內部調用 HttpContext.Current 您可以在其中推送一個假上下文.例如:

1. Since FromCurrentContext() internally makes a call to HttpContext.Current you can push a fake context in that. For example:

SimpleWorkerRequest request = new SimpleWorkerRequest(
    "/blah", @"c:inetpubwwwrootlah", "blah.html", null, new StringWriter());

HttpContext.Current= new HttpContext(request);

有了這個，它不應該再拋出異常，因為 HttpContext.Current 不為空.

With this it should not throw the exception anymore since HttpContext.Current is not null.

圍繞對 Raise 的調用創建一個封裝類，然后模擬出封裝類.

Create a wrapper class around the call to Raise and just mock out the wrapper class.

public class ErrorSignaler {

    public virtual void SignalFromCurrentContext(Exception e) {
        if (HttpContext.Current != null)
            Elmah.ErrorSignal.FromCurrentContext().Raise(e);
    } 
}

這篇關于如何模擬 Elmah 的 ErrorSignal 例程?的文章就介紹到這了，希望我們推薦的答案對大家有所幫助，也希望大家多多支持html5模板網！