Forcing MSTest to use a single thread

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.

Answer 2

I solved this problem with locking:

public static class IntegrationTestsSynchronization {     public static readonly object LockObject = new object(); } 

---

[TestClass] public class ATestCaseClass {     [TestInitialize]     public void TestInitialize()     {         Monitor.Enter(IntegrationTestsSynchronization.LockObject);     }      [TestCleanup]     public void TestCleanup()     {         Monitor.Exit(IntegrationTestsSynchronization.LockObject);     }      //test methods }  // possibly other test cases 

This can of course be extracted to a base test class and reused.