Question

Given this test fixture:

[TestClass]
public class MSTestThreads
{
    [TestMethod]
    public void Test1()
    {
        Trace.WriteLine(Thread.CurrentThread.ManagedThreadId);
    }

    [TestMethod]
    public void Test2()
    {
        Trace.WriteLine(Thread.CurrentThread.ManagedThreadId);
    }
}

Running the test with MSTest through Visual Studio or command line prints two different thread numbers (yet they are run sequentially anyway).

Is there a way to force MSTest to run them using a single thread?

Answer 1

I’ve fought for endless hours to make MSTest run in a single threaded mode on a large project that made heavy use of nHibernate and it’s not-thread-safe (not a problem, it’s just not) ISession.

We ended up more time writing code to support the multi-threaded nature of MSTest because – to the best of my and my teams knowledge – it is not possible to run MSTest in a single threaded mode.