Minimal configuration file for integration tests with Spring and MariaDb4j

TestDbConfig.java

import ch.vorburger.mariadb4j.springframework.MariaDB4jSpringService;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration;
import org.springframework.boot.autoconfigure.jdbc.DataSourceProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.DependsOn;
import org.springframework.context.annotation.Lazy;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;
import org.springframework.jdbc.datasource.SimpleDriverDataSource;

import javax.sql.DataSource;
import java.sql.Driver;

@Lazy
@Configuration
@EnableAutoConfiguration(exclude={DataSourceAutoConfiguration.class})
public class TestDbConfig {

	@Value("${db.port} ?: 3306")
	private Integer port;

	private static final String DB_SERVICE = "dbServiceBean";
	@Bean(name = {DB_SERVICE})
	public MariaDB4jSpringService mariaDb() {
		MariaDB4jSpringService mariaDb = new MariaDB4jSpringService();
		mariaDb.setDefaultPort(port);
		return mariaDb;
	}

	/**
	 * If you want to use Flyway/Liqubase, make sure those beans are also depend
	 * on the MariaDB service or this bean.
	 *
	 * @param dataSourceProperties configured in application.properties, spring.datasource.*
	 * @return
	 * @throws ClassNotFoundException
	 */
	@Bean
	@DependsOn(DB_SERVICE)
	public DataSource dataSource(DataSourceProperties dataSourceProperties) throws ClassNotFoundException {
		final SimpleDriverDataSource dataSource = new SimpleDriverDataSource();
		dataSource.setDriverClass(getDriverClassByName(dataSourceProperties.determineDriverClassName()));
		dataSource.setUrl(dataSourceProperties.getUrl());
		dataSource.setUsername(dataSourceProperties.getUsername());
		dataSource.setPassword(dataSourceProperties.getPassword());
		return dataSource;
	}

	@SuppressWarnings("unchecked")
	private Class<Driver> getDriverClassByName(String className) {
		try {
			return (Class<Driver>) Class.forName(className);
		} catch (ClassNotFoundException e) {
			throw new RuntimeException(e);
		}
	}

	@Bean
	public DataSourceTransactionManager transactionManager(DataSource dataSource) {
		DataSourceTransactionManager manager = new DataSourceTransactionManager();
		manager.setDataSource(dataSource);
		return manager;
	}

}