<?php
/**
 * SeekQuarry/Yioop --
 * Open Source Pure PHP Search Engine, Crawler, and Indexer
 *
 * Copyright (C) 2009 - 2026  Chris Pollett chris@pollett.org
 *
 * LICENSE:
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 *
 * END LICENSE
 *
 * @author Chris Pollett chris@pollett.org
 * @license https://www.gnu.org/licenses/ GPL3
 * @link https://www.seekquarry.com/
 * @copyright 2009 - 2026
 * @filesource
 */
namespace seekquarry\yioop\tests;

use seekquarry\yioop\library\JavascriptUnitTest;

/**
 * Tests that the script which works out a page's answer to a counting puzzle
 * leaves alone a page that asks for none. The site adds the call to
 * every page carrying a form, and a page whose form asks no puzzle has
 * none of the boxes it reads. Reading a value off a box that is not
 * there stopped the rest of that page's script where it stood, and the
 * line that tells somebody what just happened runs in the same breath,
 * so such a page went quiet rather than saying anything.
 *
 * @author Chris Pollett
 */
class HashCaptchaJavascriptTest extends JavascriptUnitTest
{
    /**
     * Checks that the call passes over a page with no puzzle boxes and
     * still works one out where the boxes are there.
     *
     * @return string html and Javascript that checks the answer in a
     *      browser or, from the command line, under node
     */
    public function noPuzzleOnThePageIsLeftAloneTestCase()
    {
        ob_start();
        ?>
        <div id="hashCaptchaTest"></div>
        <script src="../scripts/sha1.js" ></script>
        <script src="../scripts/hash_captcha.js" ></script>
        <script>
        var unit_test_results = [];
        /* Stands in for the boxes a page carries, which are looked up
           by name; a page with no puzzle has none of them. */
        var boxes = {};
        elt = function (named) {
            return boxes[named] || null;
        };
        var went_wrong = "";
        try {
            findNonce('nonce_for_string', 'random_string', 'time',
                'level');
        } catch (trouble) {
            went_wrong = String(trouble);
        }
        unit_test_results.push(
            {name: "a page with no puzzle boxes is passed over",
            pass: went_wrong === ""});
        boxes = {
            random_string: {value: "a-random-string"},
            time: {value: "1785987984"},
            level: {value: "1"},
            nonce_for_string: {
                attributes: {},
                setAttribute: function (named, value) {
                    this.attributes[named] = value;
                }
            }
        };
        went_wrong = "";
        try {
            findNonce('nonce_for_string', 'random_string', 'time',
                'level');
        } catch (trouble) {
            went_wrong = String(trouble);
        }
        unit_test_results.push(
            {name: "a page that does ask a puzzle answers it",
            pass: went_wrong === "" &&
            boxes.nonce_for_string.attributes.value !== undefined});
        unit_test_results.push(
            {name: "and the answer is put where the form will send it",
            pass: boxes.nonce_for_string.attributes.type === "hidden"});
        var empty_random = {
            random_string: {value: ""},
            time: {value: "1785987984"},
            level: {value: "1"},
            nonce_for_string: {
                attributes: {},
                setAttribute: function (named, value) {
                    this.attributes[named] = value;
                }
            }
        };
        boxes = empty_random;
        went_wrong = "";
        try {
            findNonce('nonce_for_string', 'random_string', 'time',
                'level');
        } catch (trouble) {
            went_wrong = String(trouble);
        }
        unit_test_results.push(
            {name: "a page whose puzzle is empty is passed over too",
            pass: went_wrong === "" &&
            boxes.nonce_for_string.attributes.value === undefined});
        </script>
        <?php
        $out_data = ob_get_contents();
        ob_end_clean();
        return $out_data;
    }
}