001package org.junit.runners;
002
003import org.junit.runners.model.InitializationError;
004
005/**
006 * Aliases the current default JUnit 4 class runner, for future-proofing. If
007 * future versions of JUnit change the default Runner class, they will also
008 * change the definition of this class. Developers wanting to explicitly tag a
009 * class as a JUnit 4 class should use {@code @RunWith(JUnit4.class)}, not,
010 * for example in JUnit 4.5, {@code @RunWith(BlockJUnit4ClassRunner.class)}.
011 * This is the only way this class should be used--any extension that
012 * depends on the implementation details of this class is likely to break
013 * in future versions.
014 *
015 * @since 4.5
016 */
017public final class JUnit4 extends BlockJUnit4ClassRunner {
018    /**
019     * Constructs a new instance of the default runner
020     */
021    public JUnit4(Class<?> klass) throws InitializationError {
022        super(klass);
023    }
024}