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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)2002-2004, 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;

/**
 * TestCase that uses a JdbcDatabaseTester.
 *
 * @author Andres Almiray 
 * @author Felipe Leme 
 */
public abstract class JdbcBasedDBTestCase extends DBTestCase
{
   public JdbcBasedDBTestCase()
   {
      super();
   }

   public JdbcBasedDBTestCase( String name )
   {
      super( name );
   }

   /**
    * Creates a new IDatabaseTester.

    * Default implementation returns a {@link JdbcDatabaseTester} configured
    * with the values returned from {@link getDriverClass},
    * {@link getConnectionUrl}, {@link getUsername} and {@link getPassword()}.
    */
   protected IDatabaseTester newDatabaseTester()
   {
      JdbcDatabaseTester databaseTester = new JdbcDatabaseTester( getDriverClass(),
            getConnectionUrl() );
      databaseTester.setUsername( getUsername() );
      databaseTester.setPassword( getPassword() );
      return databaseTester;
   }

   /**
    * Returns the test connection url.
    */
   protected abstract String getConnectionUrl();

   /**
    * Returns the JDBC driver classname.
    */
   protected abstract String getDriverClass();

   /**
    * Returns the password for the connection.

    * Subclasses may override this method to provide a custom password.

    * Default implementations returns null.
    */
   protected String getPassword()
   {
      return null;
   }

   /**
    * Returns the username for the connection.

    * Subclasses may override this method to provide a custom username.

    * Default implementations returns null.
    */
   protected String getUsername()
   {
      return null;
   }
}