Prevent junit tests from running twice

Question

There are many similar questions to my questions,but there is no clear answer for it! My tests are failing because they are running once inside suite and once alone. And I need them to run only once inside suite. This is my suite:

@RunWith(Suite.class)
@Suite.SuiteClasses({Test1.class, Test2.class})
{
.....
}

I am running the test from the command line with command test .

Has anyone found a solution for this?

Answer 1

I use the following setup to run tests with JUnit, parallel, and they run only once:

@RunWith(ParallelSuite.class)
@SuiteClasses({ Test1.class, Test2.class })
public class AllTests {

}

And I have a ParallelSuite.class:

package tests;

import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.TimeUnit;

import org.junit.internal.runners.*;
import org.junit.runners.Suite;
import org.junit.runners.model.InitializationError;
import org.junit.runners.model.RunnerBuilder;
import org.junit.runners.model.RunnerScheduler;

public class ParallelSuite extends Suite {
    public ParallelSuite(Class<?> klass, RunnerBuilder builder) throws InitializationError  {

        super(klass, builder);

        setScheduler(new RunnerScheduler() {

            private final ExecutorService service = Executors.newFixedThreadPool(4);

            public void schedule(Runnable childStatement) {
                service.submit(childStatement);
            }

            public void finished() {
                try {
                    service.shutdown();
                    service.awaitTermination(Long.MAX_VALUE, TimeUnit.NANOSECONDS);
                } catch (InterruptedException e) {
                    e.printStackTrace(System.err);
                }
            }
        });
    }
}