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📄 a_links_dont_open_new_window_test.php(3.79 KB)
📄 a_must_contain_text_test.php(2.21 KB)
📄 a_suspicious_link_text_test.php(3.21 KB)
📄 all_checks.php(1.49 KB)
📄 area_dont_open_new_window_test.php(3.68 KB)
📄 area_has_alt_value_test.php(2.21 KB)
📄 basefont_is_not_used_test.php(2.22 KB)
📄 blink_is_not_used_test.php(2.19 KB)
📄 bold_is_not_used_test.php(2.28 KB)
📄 content_too_long_test.php(13.24 KB)
📄 css_text_has_contrast_test.php(7.77 KB)
📄 embed_has_associated_no_embed_test.php(2.95 KB)
📄 header_h3_test.php(4.2 KB)
📄 headers_have_text_test.php(3.18 KB)
📄 i_is_not_used_test.php(2.15 KB)
📄 img_alt_is_different_test.php(2.22 KB)
📄 img_alt_is_too_long_test.php(2.88 KB)
📄 img_alt_not_empty_in_anchor_test.php(2.37 KB)
📄 img_alt_not_place_holder_test.php(5.03 KB)
📄 img_has_alt_test.php(2.73 KB)
📄 img_with_map_has_use_map_test.php(2.35 KB)
📄 legend_text_not_empty_test.php(2.7 KB)
📄 marquee_is_not_used.php(2.28 KB)
📄 no_headings_test.php(17.65 KB)
📄 object_must_have_embed_test.php(2.31 KB)
📄 object_must_have_title_test.php(2.31 KB)
📄 object_must_have_valid_title_test.php(4.56 KB)
📄 strike_is_not_used_test.php(2.66 KB)
📄 table_data_should_have_th_test.php(3.74 KB)
📄 table_summary_does_not_duplicate_caption_test.php(2.51 KB)
📄 table_td_should_not_merge_test.php(3.71 KB)
📄 table_th_should_have_scope_test.php(5.23 KB)

Editing: img_has_alt_test.php

<?php
// This file is part of Moodle - http://moodle.org/
//
// Moodle 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.
//
// Moodle 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 Moodle.  If not, see <http://www.gnu.org/licenses/>.

/**
 * tool_brickfield check test.
 *
 * @package    tool_brickfield
 * @copyright  2020 onward: Brickfield Education Labs, https://www.brickfield.ie
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */

namespace tool_brickfield\local\htmlchecker\common\checks;

defined('MOODLE_INTERNAL') || die();

require_once('all_checks.php');

/**
 * Class test_css_text_has_contrast_testcase
 */
class img_has_alt_test extends all_checks {
    /** @var string Check type */
    public $checktype = 'img_has_alt';

/** @var string Html fail 1 */
    private $htmlfail1 = <<<EOD
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
    <head>
        <title>Image alt attributes need to be specified - fail</title>
    </head>
    <body>
    <img src="rex.jpg" alt="">
    </body>
</html>
EOD;

/** @var string Html fail 2 */
    private $htmlfail2 = <<<EOD
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
    <head>
        <title>Image alt attributes need to be specified - fail</title>
    </head>
    <body>
    <img src="rex.jpg">
    </body>
</html>
EOD;

/** @var string Html pass */
    private $htmlpass = <<<EOD
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
    <head>
        <title>Image alt attributes need to be specified - fail</title>
    </head>
    <body>
    <img src="rex.jpg" alt="this is an image of rex">
    </body>
</html>
EOD;
    /**
     * Test for missing image alt text.
     */
    public function test_check_fail() {
        $results = $this->get_checker_results($this->htmlfail1);
        $this->assertTrue($results[0]->element->tagName == 'img');

$results = $this->get_checker_results($this->htmlfail2);
        $this->assertTrue($results[0]->element->tagName == 'img');
    }

/**
     * Test for present image alt text.
     */
    public function test_check_pass() {
        $results = $this->get_checker_results($this->htmlpass);
        $this->assertTrue(count($results) == 0);
    }
}

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