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<?php
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// This file is part of Moodle - http://moodle.org/
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//
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// Moodle is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Moodle is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
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/**
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* tool_brickfield check test.
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*
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* @package tool_brickfield
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* @copyright 2020 onward: Brickfield Education Labs, https://www.brickfield.ie
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* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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*/
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namespace tool_brickfield\local\htmlchecker\common\checks;
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use tool_brickfield\local\htmlchecker\brickfield_accessibility;
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defined('MOODLE_INTERNAL') || die();
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require_once('all_checks.php');
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/**
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* Class img_alt_is_too_long_testcase
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*
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* @covers \tool_brickfield\local\htmlchecker\common\checks\img_alt_is_too_long
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*/
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final class img_alt_is_too_long_test extends all_checks {
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/** @var string Check type */
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protected $checktype = 'img_alt_is_too_long';
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/**
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* Get test HTML with an image tag.
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*
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* @param string $alttext
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* @return string
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*/
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protected function get_test_html(string $alttext): string {
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return <<<EOD
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<!DOCTYPE HTML>
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<html lang="en">
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<head>
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<title>Image alt attributes must not be too long</title>
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</head>
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<body>
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<img src="rex.jpg" alt="$alttext">
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</body>
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</html>
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EOD;
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}
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/**
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* Image alt text data provider.
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*
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* @return array
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*/
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public static function img_alt_text_provider(): array {
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return [
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'Alt text <= 750 characters' => [
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true,
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str_repeat("Hello world!", 60),
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],
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'Alt text > 750 characters' => [
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false,
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str_repeat("Hello world!", 65),
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],
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'Multi-byte alt text <= 750 characters' => [
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true,
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str_repeat('こんにちは、世界！', 83),
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],
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'Multi-byte alt text > 750 characters' => [
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false,
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str_repeat('こんにちは、世界！', 90),
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],
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];
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}
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/**
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* Test for image alt attributes being too long
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*
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* @dataProvider img_alt_text_provider
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* @param bool $expectedpass Whether the test is expected to pass or fail.
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* @param string $alttext The alt text to test.
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*/
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public function test_check(bool $expectedpass, string $alttext): void {
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$html = $this->get_test_html($alttext);
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$results = $this->get_checker_results($html);
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if ($expectedpass) {
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$this->assertEmpty($results);
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} else {
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$this->assertEquals('img', $results[0]->element->tagName);
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}
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}
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/**
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* Test the severity of the {@see img_alt_is_too_long} check.
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*
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* @return void
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*/
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public function test_severity(): void {
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$html = $this->get_test_html('Some alt text');
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$checker = new brickfield_accessibility($html, 'brickfield', 'string');
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$this->assertEquals(brickfield_accessibility::BA_TEST_SUGGESTION, $checker->get_test_severity(img_alt_is_too_long::class));
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}
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}
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