How to unit test an Action method which returns JsonResult?

I know I’m a bit late on this guys, but I found out why the dynamic solution wasn’t working:

JsonResult returns an anonymous object and these are, by default, internal, so they need to be made visible to the tests project.

Open your ASP.NET MVC application project and find AssemblyInfo.cs from folder called Properties. Open AssemblyInfo.cs and add the following line to the end of this file.

[assembly: InternalsVisibleTo("MyProject.Tests")]

Quoted from: http://weblogs.asp.net/gunnarpeipman/archive/2010/07/24/asp-net-mvc-using-dynamic-type-to-test-controller-actions-returning-jsonresult.aspx

I thought it would be nice to have this one for the record. Works like a charm

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