### Question:
PageDataJdbcDaoImpl implements PageDataJdbcDao { @Override public void delete(Integer pageId) { jdbcTemplate.update(SQL_DELETE_PAGE_DATA, pageId); }  @Override void delete(Integer pageId); @Override void batchSave(Integer pageId, List<PageDataItem> allData);  }### Answer:
@Test public void delete_no_data() { pageDataJdbcDao.delete(1); assertThat(countRowsInTable("PAGE_DATA")).isEqualTo(0); }