public function testDelete()
{
$config = $this->getConfig();
$order_model = new Model('order', $config);
$order_model->id = 2;
$flag = $order_model->delete();
$this->assertEquals(1, $flag);
$flag = $order_model->delete('1');
$this->assertEquals(1, $flag);
$address_model = new Model('user_address', $config);
$flag = $address_model->delete(['1', '2']);
$this->assertEquals(2, $flag);
$user_model = new Model('user', $config);
$flag = $user_model->using([''])->where('1=1')->delete();
$this->assertEquals(2, $flag);
$ru_model = new Model('role_user', $config);
$flag = $ru_model->delete(['1', '1']);
$this->assertEquals(1, $flag);
$sql = <<<EOF
DROP TABLE IF EXISTS `tp_user`;
DROP TABLE IF EXISTS `tp_order`;
DROP TABLE IF EXISTS `tp_user_address`;
DROP TABLE IF EXISTS `tp_role_user`;
EOF;
$model = new Model('', $this->getConfig());
$model->execute($sql);
$flag = $model->db(0, null);
$this->assertNull($flag);
}