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dbUnit is a JUnit extension (also usable from Ant and Maven) targeted for database-driven projects that, among other things, puts your database into a known state between test runs. This is an excellent way to avoid the myriad of problems that can occur when one test case corrupts the database and causes subsequent tests to fail or exacerbate the damage.

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/*
 *
 *  The DbUnit Database Testing Framework
 *  Copyright (C)2002-2008, DbUnit.org
 *
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Lesser General Public
 *  License as published by the Free Software Foundation; either
 *  version 2.1 of the License, or (at your option) any later version.
 *
 *  This library is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *  Lesser General Public License for more details.
 *
 *  You should have received a copy of the GNU Lesser General Public
 *  License along with this library; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 */
package org.dbunit.assertion;

/**
 * Factory to create exceptions for the testing framework to be used,
 * for example JUnit, TestNG or dbunit exceptions.
 * 
 * @author gommma (gommma AT users.sourceforge.net)
 * @author Last changed by: $Author$
 * @version $Revision$ $Date$
 * @since 2.4.0
 */
public interface FailureFactory 
{
    /**
     * Creates a new failure object which can have different types, depending on
     * the testing framework you are currently using (e.g. JUnit, TestNG, ...)
     * @param message The reason for the failure
     * @param expected The expected result
     * @param actual The actual result
     * @return The comparison failure object for this handler (can be JUnit or some other)
     * which can be thrown on an assertion failure
     */
    public Error createFailure(String message, String expected, String actual);

    /**
     * @param message The reason for the failure
     * @return The assertion failure object for this handler (can be JUnit or some other)
     * which can be thrown on an assertion failure
     */
    public Error createFailure(String message);

}