JUnit how to avoid no runnable methods in test utils classes

Question

I have switched to JUnit4 4 from JUnit3 8  I run my tests using ant  all my tests run successfully but test utility classes fail with  No runnable methods  error  The pattern I am using is to include all classes with name  Test  under test folder   I understand that the runner can t find any method annotated with  Test attribute  But they don t contain such annotation because these classes are not tests  Surprisingly when running these tests in eclipse  it doesn t complain about these classes   In JUnit3 8 it wasn t a problem at all since these utility classes didn t extend TestCase so the runner didn t try to execute them    I know I can exclude these specific classes in the junit target in ant script  But I don t want to change the build file upon every new utility class I add  I can also rename the classes  but giving good names to classes was always my weakest talent  -     Is there any elegant solution for this problem

User · Answer

In your test class if wrote import org junit jupiter api Test  delete it and write import org junit Test  In this case it worked me as well

User · Answer

Ant now comes with the skipNonTests attribute which was designed to do exactly what you seem to be looking for  No need to change your base classes to abstract or add annotations to them

User · Answer

To prevent JUnit from instantiating your test base class just make it   public abstract class MyTestBaseClass       whatever          Ignore reports it as ignored which I reserve for temporarily ignored tests

User · Answer

My specific case has the following scenario   Our tests   public class VenueResourceContainerTest extends BaseTixContainerTest   all extend   BaseTixContainerTest   and JUnit was trying to run BaseTixContainerTest   Poor BaseTixContainerTest was just trying to setup the container  setup the client  order some pizza and relax    man     As mentioned previously  you can annotate the class with    Ignore   But that caused JUnit to report that test as skipped  as opposed to completely ignored      Tests run  4  Failures  0  Errors  0  Skipped  1   That kind of irritated me    So I made BaseTixContainerTest abstract  and now JUnit truly ignores it   Tests run  3  Failures  0  Errors  0  Skipped  0

User · Answer

Be careful when using an IDE s code-completion to add the import for  Test    It has to be import org junit Test and not import org testng annotations Test  for example  If you do the latter  you ll get the  no runnable methods  error

User · Answer

Assuming you re in control of the pattern used to find test classes  I d suggest changing it to match  Test rather than  Test   That way TestHelper won t get matched  but FooTest will

User · Answer

Annotate your util classes with  Ignore  This will cause JUnit not to try and run them as tests

User · Answer

If this is your base test class for example AbstractTest  and all your tests extends this  then define this class as abstract If it is Util class then better remove  Test from the class rename it is MyTestUtil or Utils etc

User · Answer

What about adding an empty test method to these classes    public void avoidAnnoyingErrorMessageWhenRunningTestsInAnt         assertTrue true      do nothing

User · Answer

I was also facing a similar issue   no runnable methods     on running the simplest of simple piece of code  Using  Test   Before etc   and found the solution nowhere  I was using Junit4 and Eclipse SDK version 4 1 2  Resolved my problem by using the latest Eclipse SDK 4 2 2  I hope this helps people who are struggling with a somewhat similar issue

[java] JUnit: how to avoid "no runnable methods" in test utils classes

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