@Test
void sourceCode() {

    RowMapperBuilder<AutoIncrementIdEntity> builder = new RowMapperBuilder<>(AutoIncrementIdEntity.class, new EnumDBMapper());
    RowMapper<AutoIncrementIdEntity> mapper = builder.build();
    assertNotNull(mapper);
    String sourceCode = builder.builder.sourceCode();
    assertEquals(ClasspathResources.text("db-test/row-mapper-auto-increment-id.java"), sourceCode);
}