VS 2010 Test Runner error “The agent process was stopped while the test was running.”

Question

In Visual Studio 2010, I have a number of unit tests. When I run multiple tests at one time using test lists, I sometimes reveive the following error for one or more of the

Answer 1

I have had this happening on the odd occasion, and the culprit almost always turns out to be threading.

Strangely enough all the tests would work fine on the development machines, then randomly fail on the build servers.

On closer inspection it turned out that although the tests were being listed as passed on the dev boxes, there were exceptions being thrown. The exceptions were being thrown on a seperate thread which didn't get picked up as an error.

The exception details were being logged against the test trace, so we were able to identify which code/tests needed to be modified.

Hope this helps someone.