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JUnit is a unit testing framework for Java, created by Erich Gamma and Kent Beck.

There is a newer version: 4.13.2

package org.junit.internal.requests;

import org.junit.internal.runners.ErrorReportingRunner;
import org.junit.runner.Request;
import org.junit.runner.Runner;
import org.junit.runner.manipulation.InvalidOrderingException;
import org.junit.runner.manipulation.Ordering;

/** @since 4.13 */
public class OrderingRequest extends MemoizingRequest {
    private final Request request;
    private final Ordering ordering;

    public OrderingRequest(Request request, Ordering ordering) {
        this.request = request;
        this.ordering = ordering;
    }

    @Override
    protected Runner createRunner() {
        Runner runner = request.getRunner();
        try {
            ordering.apply(runner);
        } catch (InvalidOrderingException e) {
            return new ErrorReportingRunner(ordering.getClass(), e);
        }
        return runner;
    }
}