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Useful classes for writing automated tests with JUnit

There is a newer version: 2.4

package com.googlecode.junittoolbox;

import org.junit.runners.model.InitializationError;
import org.junit.runners.model.RunnerBuilder;

/**
 * An extension of the {@link WildcardPatternSuite} runner, which executes
 * its children classes concurrently. You can specify the maximum number
 * of parallel test threads using the system property maxParallelTestThreads.
 * If this system property is not specified, the maximum number of test threads
 * will be the number of {@link Runtime#availableProcessors() available processors.}
 * You can either explicitly list the children classes using the
 * {@link org.junit.runners.Suite.SuiteClasses @SuiteClasses} annotation
 * provided by JUnit itself, like this: *     @RunWith(ParallelSuite.class)
 *     @SuiteClasses({
 *         LoginFrontendTest.class,
 *         FillOutFormFrontendTest.class,
 *         ...
 *     })
 *     public class AllFrontendTests {}
 * 
 * Or you can specify a wildcard pattern using the {@link com.googlecode.junittoolbox.SuiteClasses @SuiteClasses} annotation
 * provided by JUnit Toolbox: *     @RunWith(ParallelSuite.class)
 *     @SuiteClasses("**/*FrontendTest.class")
 *     public class AllFrontendTests {}
 * 
 * Note: Even if a test class annotated with @RunWith(ParallelSuite.class)
 * has a child class, which is also annotated with @RunWith(ParallelSuite.class)
 * or with @RunWith(ParallelRunner.class), there will never be
 * more test threads than specified (or the number of available processors), because
 * ParallelSuite and {@link ParallelRunner} share a singleton
 * fork join pool.
 */
public class ParallelSuite extends WildcardPatternSuite {

    public ParallelSuite(Class klass, RunnerBuilder builder) throws InitializationError {
        super(klass, builder);
        setScheduler(new ParallelScheduler());
    }
}