H2 database files disappear - h2

Question

After finishing some integration tests I found that my expected H2 database files did not exist.
With a url of "jdbc:h2:/tmp/casper" I expected to have a /tmp/casper.mv.db file however there was none.
The reason is that while initializing the database I used "drop all objects delete files" After all my work, it disappeared after the test when the datasource was closed.
Demonstration in my answer to this question.

Answer 1

package org.javautil.h2;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
import java.io.File;
import java.sql.Connection;
import java.sql.Statement;
import org.junit.Test;
import com.zaxxer.hikari.HikariConfig;
import com.zaxxer.hikari.HikariDataSource;
public class H2DropAllObjectsTest {
#Test
public void casper() throws Exception {
final HikariConfig config = new HikariConfig();
config.setJdbcUrl("jdbc:h2:/tmp/casper");
config.setUsername("sr");
config.setPassword("tutorial");
config.setAutoCommit(true);
HikariDataSource dataSource = new HikariDataSource(config);
Connection connection = dataSource.getConnection();
File f = new File("/tmp/casper.mv.db");
assertTrue (f.exists());
Statement s = connection.createStatement();
s.execute("drop all objects delete files");
assertTrue (f.exists());
s.execute("create table a (b number(9))");
/* do a lot of work */
connection.commit();
s.close();
connection.close();
assertTrue (f.exists());
dataSource.close();
assertFalse (f.exists());
}
}

Answer 2

Just handle your database as update don't use create/drop
dataSource:
dbCreate: update