单元测试和MEF错误

Question

I am trying to use unit testing in an application that uses MEF to load plugins.

The line of code:

var dirCatalog = new DirectoryCatalog(
    Path.Combine(
         Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location),
         "Plugins"));

Works perfectly fine in debug or release mode.

But if I am running a test or debugging a test it just closes the testing. No exception caught. Nothing.

I've check that the path is correct.

Answer 1

I have a desktop application where the business logic library makes heavy use MEF and includes a number of unit tests. I built my catalog using AppDomain.BaseDirectory :

var location = AppDomain.CurrentDomain.BaseDirectory;
var dirCatalog = new DirectoryCatalog(Path.Combine(location, "Plugins"));

If it needs to run both in a desktop application and in the web application, try using AppDomain.RelativeSearchPath :

var location = AppDomain.CurrentDomain.RelativeSearchPath ?? 
               AppDomain.CurrentDomain.BaseDirectory;
var dirCatalog = new DirectoryCatalog(Path.Combine(location, "Plugins"));