datasourceConfig.java

@Bean
	public DataSource dataSource() {
		DriverManagerDataSource ds = new DriverManagerDataSource();
		ds.setDriverClassName("org.postgresql.Driver");
    // here we reference the static test container variable in our test case to get the used the connection details
		ds.setUrl(format("jdbc:postgresql://%s:%s/%s", postgreSQLContainer.getContainerIpAddress(),
				postgreSQLContainer.getMappedPort(
						PostgreSQLContainer.POSTGRESQL_PORT), postgreSQLContainer.getDatabaseName()));
		ds.setUsername(postgreSQLContainer.getUsername());
		ds.setPassword(postgreSQLContainer.getPassword());
		ds.setSchema(postgreSQLContainer.getDatabaseName());
		return ds;
}