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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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* Class test_css_text_has_contrast 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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defined('MOODLE_INTERNAL') || die();
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require_once('all_checks.php');
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/**
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* Class test_css_text_has_contrast_test
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* @covers \tool_brickfield\local\htmlchecker\brickfield_accessibility
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*/
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final class css_text_has_contrast_test extends all_checks {
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/** @var string The check type. */
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protected $checktype = 'css_text_has_contrast';
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/** @var string HTML that should get flagged. */
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private $htmlfail1 = <<<EOD
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN""http://www.w3.org/TR/REC-html40/loose.dtd">
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<html lang="en">
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<head>
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<title>OAC Testfile - Check #6 - Positive</title>
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</head>
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<body>
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<p style="color:#333333; background-color:#000000; font-weight: bold;">This is not contrasty enough.</p>
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</body>
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</html>
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EOD;
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/** @var string HTML that should get flagged. */
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private $htmlfail2 = <<<EOD
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN""http://www.w3.org/TR/REC-html40/loose.dtd">
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<html lang="en">
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<head>
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<title>OAC Testfile - Check #6 - Positive</title>
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</head>
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<body>
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<p style="color:#333333; background-color:#000000; font-size: 18px;">This is not contrasty enough.</p>
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</body>
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</html>
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EOD;
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/** @var string HTML that should get flagged. */
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private $htmlfail3 = <<<EOD
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN""http://www.w3.org/TR/REC-html40/loose.dtd">
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<html lang="en">
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<head>
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<title>OAC Testfile - Check #6 - Positive</title>
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</head>
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<body>
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<p style="color:#333333; background-color:#000000; font-size: 18%;">This is not contrasty enough.</p>
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</body>
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</html>
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EOD;
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/** @var string HTML that should get flagged. */
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private $htmlfail4 = <<<EOD
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN""http://www.w3.org/TR/REC-html40/loose.dtd">
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<html lang="en">
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<head>
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<title>OAC Testfile - Check #6 - Positive</title>
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</head>
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<body>
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<p style="color:#333333; background-color:#000000; font-size: 18em;">This is not contrasty enough.</p>
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</body>
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</html>
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EOD;
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/** @var string HTML that should get flagged. */
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private $htmlfail5 = <<<EOD
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN""http://www.w3.org/TR/REC-html40/loose.dtd">
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<html lang="en">
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<head>
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<title>OAC Testfile - Check #6 - Positive</title>
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</head>
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<body>
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<p style="color:#333333; background-color:#000000; font-size: 18ex;">This is not contrasty enough.</p>
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</body>
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</html>
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EOD;
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/** @var string HTML that should get flagged. */
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private $htmlfail6 = <<<EOD
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN""http://www.w3.org/TR/REC-html40/loose.dtd">
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<html lang="en">
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<head>
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<title>OAC Testfile - Check #6 - Positive</title>
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</head>
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<body>
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<p style="color:#333333; background-color:#000000;">This is not contrasty enough.</p>
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</body>
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</html>
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EOD;
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/** @var string HTML that should not get flagged. */
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private $htmlpass = <<<EOD
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN""http://www.w3.org/TR/REC-html40/loose.dtd">
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<html lang="en">
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<head>
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<title>OAC Testfile - Check #6 - Positive</title>
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</head>
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<body>
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<p style="color:#333333; background-color:#ffffff;">This is contrasty enough.</p>
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</body>
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</html>
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EOD;
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/** @var string HTML that should get flagged. */
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private $namecolours = <<<EOD
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN""http://www.w3.org/TR/REC-html40/loose.dtd">
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<html lang="en">
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<head>
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<title>OAC Testfile - Check #6 - Positive</title>
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</head>
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<body>
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<p style="color: red; background-color: blue;">This is not contrasty enough.</p>
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</body>
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</html>
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EOD;
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/** @var string HTML with invalid colour names. */
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private $invalidcolours = <<<EOD
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN""http://www.w3.org/TR/REC-html40/loose.dtd">
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<html lang="en">
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<head>
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<title>OAC Testfile - Check #6 - Positive</title>
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</head>
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<body>
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<p style="color: grog; background-color: numpi;">This is not contrasty enough.</p>
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</body>
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</html>
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EOD;
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/** @var string HTML with invalid colour numeric values. */
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private $invalidvalue = <<<EOD
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN""http://www.w3.org/TR/REC-html40/loose.dtd">
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<html lang="en">
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<head>
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<title>OAC Testfile - Check #6 - Positive</title>
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</head>
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<body>
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<p style="color: 10000500; background-color: -10234;">This is not contrasty enough.</p>
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</body>
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</html>
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EOD;
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/** @var string HTML with empty colour values. */
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private $emptyvalue = <<<EOD
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN""http://www.w3.org/TR/REC-html40/loose.dtd">
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<html lang="en">
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<head>
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<title>OAC Testfile - Check #6 - Positive</title>
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</head>
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<body>
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<p style="color:; background-color:;">This is not contrasty enough.</p>
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</body>
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</html>
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EOD;
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/** @var string HTML with px18 fail colour values. */
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private $px18 = <<<EOD
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<body><p style="color:#EF0000; background-color:white; font-size: 18px">
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This is not contrasty enough.</p></body>
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EOD;
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/** @var string HTML with px19bold pass colour values. */
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private $px19bold = <<<EOD
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<body><p style="color:#EF0000; background-color:white; font-size: 19px; font-weight: bold;">
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This is contrasty enough.</p></body>
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EOD;
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/** @var string HTML with px18 pass colour values. */
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private $px18pass = <<<EOD
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<body><p style="color:#E60000; background-color:white; font-size: 18px">
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This is contrasty enough.</p></body>
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EOD;
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/** @var string HTML with medium size colour values. */
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private $mediumfail = <<<EOD
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<body><p style="color:#EF0000; background-color:white; font-size: medium">
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This is not contrasty enough.</p></body>
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EOD;
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/** @var string HTML with px18 colour values. */
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private $mediumpass = <<<EOD
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<body><p style="color:#E60000; background-color:white; font-size: medium">
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This is contrasty enough.</p></body>
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EOD;
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/** @var string HTML with larger fail colour values. */
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private $largerfail = <<<EOD
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<body><p style="color:#FF6161; background-color:white; font-size: larger">
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This is not contrasty enough.</p></body>
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EOD;
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/** @var string HTML with px18 colour values. */
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private $largerpass = <<<EOD
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<body><p style="color:#FF5C5C; background-color:white; font-size: larger;">
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This is contrasty enough.</p></body>
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EOD;
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/** @var string HTML with px18 colour values. */
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private $largerboldpass = <<<EOD
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<body><p style="color:#FF5C5C; background-color:white; font-size: larger; font-weight: bold;">
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This is contrasty enough.</p></body>
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EOD;
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/** @var string HTML with calculated size colour values. */
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private $calculatedfail = <<<EOD
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<body><p style="color:#EF0000; background-color:white; font-size: calc(0.90375rem + 0.045vw)">
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This is not contrasty enough.</p></body>
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EOD;
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/** @var string HTML with calculated size colour values. */
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private $calculatedpass = <<<EOD
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<body><p style="color:#E60000; background-color:white; font-size: calc(0.90375rem + 0.045vw);">
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This is contrasty enough.</p></body>
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EOD;
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/**
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* Test for the area assign intro
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*/
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public function test_check(): void {
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$results = $this->get_checker_results($this->htmlfail1);
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$this->assertTrue($results[0]->element->tagName == 'p');
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$results = $this->get_checker_results($this->htmlfail2);
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$this->assertTrue($results[0]->element->tagName == 'p');
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$results = $this->get_checker_results($this->htmlfail3);
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$this->assertTrue($results[0]->element->tagName == 'p');
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$results = $this->get_checker_results($this->htmlfail4);
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$this->assertTrue($results[0]->element->tagName == 'p');
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$results = $this->get_checker_results($this->htmlfail5);
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$this->assertTrue($results[0]->element->tagName == 'p');
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$results = $this->get_checker_results($this->htmlfail6);
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$this->assertTrue($results[0]->element->tagName == 'p');
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$results = $this->get_checker_results($this->htmlpass);
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$this->assertEmpty($results);
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}
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/**
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* Test with valid colour names.
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*/
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public function test_check_for_namedcolours(): void {
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$results = $this->get_checker_results($this->namecolours);
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$this->assertTrue($results[0]->element->tagName == 'p');
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}
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/**
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* Test with invalid colour names.
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*/
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public function test_check_for_invalidcolours(): void {
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$results = $this->get_checker_results($this->invalidcolours);
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$this->assertTrue($results[0]->element->tagName == 'p');
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}
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/**
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* Test with invalid colour numeric values.
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*/
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public function test_check_for_invalidvalues(): void {
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$results = $this->get_checker_results($this->invalidvalue);
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$this->assertTrue($results[0]->element->tagName == 'p');
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}
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/**
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* Test with empty colour values.
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*/
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public function test_check_for_emptyvalues(): void {
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$results = $this->get_checker_results($this->emptyvalue);
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$this->assertEmpty($results);
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}
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/**
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* Test for text px18 with insufficient contrast of 4.49.
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*/
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public function test_check_for_px18_fail(): void {
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$results = $this->get_checker_results($this->px18);
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$this->assertTrue($results[0]->element->tagName == 'p');
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}
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/**
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* Test for text px19 bold with sufficient contrast of 4.49.
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*/
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public function test_check_for_px19bold_pass(): void {
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$results = $this->get_checker_results($this->px19bold);
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$this->assertEmpty($results);
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}
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/**
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* Test for text px18 with sufficient contrast of 4.81.
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*/
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public function test_check_for_px18_pass(): void {
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$results = $this->get_checker_results($this->px18pass);
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$this->assertEmpty($results);
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}
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/**
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* Test for medium (12pt) text with insufficient contrast of 4.49.
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*/
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efrain |
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public function test_check_for_medium_fail(): void {
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$results = $this->get_checker_results($this->mediumfail);
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$this->assertTrue($results[0]->element->tagName == 'p');
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}
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/**
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333 |
* Test for medium (12pt) text with sufficient contrast of 4.81.
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|
|
334 |
*/
|
| 11 |
efrain |
335 |
public function test_check_for_medium_pass(): void {
|
| 1 |
efrain |
336 |
$results = $this->get_checker_results($this->mediumpass);
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|
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337 |
$this->assertEmpty($results);
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338 |
}
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|
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339 |
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340 |
/**
|
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341 |
* Test for larger (14pt) text with insufficient contrast of 2.94.
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342 |
*/
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| 11 |
efrain |
343 |
public function test_check_for_larger_fail(): void {
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| 1 |
efrain |
344 |
$results = $this->get_checker_results($this->largerfail);
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|
|
345 |
$this->assertTrue($results[0]->element->tagName == 'p');
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346 |
}
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|
|
347 |
|
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|
348 |
/**
|
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349 |
* Test for larger (14pt) text with insufficient contrast of 3.02.
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|
350 |
*/
|
| 11 |
efrain |
351 |
public function test_check_for_larger_pass(): void {
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| 1 |
efrain |
352 |
$results = $this->get_checker_results($this->largerpass);
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|
|
353 |
$this->assertTrue($results[0]->element->tagName == 'p');
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|
|
354 |
}
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|
|
355 |
|
|
|
356 |
/**
|
|
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357 |
* Test for larger (14pt) bold text with sufficient contrast of 3.02.
|
|
|
358 |
*/
|
| 11 |
efrain |
359 |
public function test_check_for_largerbold_pass(): void {
|
| 1 |
efrain |
360 |
$results = $this->get_checker_results($this->largerboldpass);
|
|
|
361 |
$this->assertEmpty($results);
|
|
|
362 |
}
|
| 1441 |
ariadna |
363 |
|
|
|
364 |
/**
|
|
|
365 |
* Test for rgb colors with insufficient contrast.
|
|
|
366 |
*/
|
|
|
367 |
public function test_bad_rgbcolor(): void {
|
|
|
368 |
$html = '<body><p style="color:rgb(255, 255, 255); background-color:rgb(204, 204, 204);">
|
|
|
369 |
This is not contrasty enough.</p></body>';
|
|
|
370 |
$results = $this->get_checker_results($html);
|
|
|
371 |
$this->assertTrue($results[0]->element->tagName == 'p');
|
|
|
372 |
}
|
|
|
373 |
|
|
|
374 |
/**
|
|
|
375 |
* Test for rgb colors with sufficient contrast.
|
|
|
376 |
*/
|
|
|
377 |
public function test_good_rgbcolor(): void {
|
|
|
378 |
$html = '<body><p style="color:rgb(255, 255, 255); background-color:rgb(0, 0, 0);">
|
|
|
379 |
This is contrasty enough.</p></body>';
|
|
|
380 |
$results = $this->get_checker_results($html);
|
|
|
381 |
$this->assertEmpty($results);
|
|
|
382 |
}
|
|
|
383 |
|
|
|
384 |
/**
|
|
|
385 |
* Test for named colors with insufficient contrast.
|
|
|
386 |
*/
|
|
|
387 |
public function test_bad_namedcolor2(): void {
|
|
|
388 |
$html = '<body><p style="color:lightcyan; background-color:lavender;">
|
|
|
389 |
This is not contrasty enough.</p></body>';
|
|
|
390 |
$results = $this->get_checker_results($html);
|
|
|
391 |
$this->assertTrue($results[0]->element->tagName == 'p');
|
|
|
392 |
}
|
|
|
393 |
|
|
|
394 |
/**
|
|
|
395 |
* Test for named colors with sufficient contrast.
|
|
|
396 |
*/
|
|
|
397 |
public function test_good_namedcolor2(): void {
|
|
|
398 |
$html = '<body><p style="color:linen; background-color:darkslategray;">
|
|
|
399 |
This is contrasty enough.</p></body>';
|
|
|
400 |
$results = $this->get_checker_results($html);
|
|
|
401 |
$this->assertEmpty($results);
|
|
|
402 |
}
|
|
|
403 |
|
|
|
404 |
/**
|
|
|
405 |
* Test for background value with insufficient contrast.
|
|
|
406 |
*/
|
|
|
407 |
public function test_bad_backgroundcss(): void {
|
|
|
408 |
$html = '<body><p style="color:lightcyan; background:fixed lavender center;">
|
|
|
409 |
This is not contrasty enough.</p></body>';
|
|
|
410 |
$results = $this->get_checker_results($html);
|
|
|
411 |
$this->assertTrue($results[0]->element->tagName == 'p');
|
|
|
412 |
}
|
|
|
413 |
|
|
|
414 |
/**
|
|
|
415 |
* Test for background value with sufficient contrast.
|
|
|
416 |
*/
|
|
|
417 |
public function test_good_backgroundcss(): void {
|
|
|
418 |
$html = '<body><p style="color:linen; background:fixed darkslategray center;">
|
|
|
419 |
This is contrasty enough.</p></body>';
|
|
|
420 |
$results = $this->get_checker_results($html);
|
|
|
421 |
$this->assertEmpty($results);
|
|
|
422 |
}
|
|
|
423 |
|
|
|
424 |
/**
|
|
|
425 |
* Test for background value with rgb with insufficient contrast.
|
|
|
426 |
*/
|
|
|
427 |
public function test_bad_backgroundcssrgb(): void {
|
|
|
428 |
$html = '<body><p style="color:rgb(255, 255, 255); background:fixed rgb(204, 204, 204) center;">
|
|
|
429 |
This is not contrasty enough.</p></body>';
|
|
|
430 |
$results = $this->get_checker_results($html);
|
|
|
431 |
$this->assertTrue($results[0]->element->tagName == 'p');
|
|
|
432 |
}
|
|
|
433 |
|
|
|
434 |
/**
|
|
|
435 |
* Test for background value with rgb with sufficient contrast.
|
|
|
436 |
*/
|
|
|
437 |
public function test_good_backgroundcssrgb(): void {
|
|
|
438 |
$html = '<body><p style="color:rgb(255, 255, 255); background:fixed rgb(0, 0, 0) center;">
|
|
|
439 |
This is contrasty enough.</p></body>';
|
|
|
440 |
$results = $this->get_checker_results($html);
|
|
|
441 |
$this->assertEmpty($results);
|
|
|
442 |
}
|
|
|
443 |
|
|
|
444 |
/**
|
|
|
445 |
* Test for text with insufficient contrast of 4.3.
|
|
|
446 |
*/
|
|
|
447 |
public function test_bad_contrastrounding(): void {
|
|
|
448 |
$html = '<body><p style="color:#F50000; background-color:white; font-size: 12px">
|
|
|
449 |
This is not contrasty enough.</p></body>';
|
|
|
450 |
$results = $this->get_checker_results($html);
|
|
|
451 |
$this->assertTrue($results[0]->element->tagName == 'p');
|
|
|
452 |
}
|
|
|
453 |
|
|
|
454 |
/**
|
|
|
455 |
* Test for background value with rgba with insufficient contrast.
|
|
|
456 |
*/
|
|
|
457 |
public function test_bad_backgroundcssrgba(): void {
|
|
|
458 |
$html = '<body><p style="color:rgba(255, 255, 255, 0.5); background:fixed rgba(0, 204, 204, 0.5) center;">
|
|
|
459 |
This is not contrasty enough.</p></body>';
|
|
|
460 |
$results = $this->get_checker_results($html);
|
|
|
461 |
$this->assertTrue($results[0]->element->tagName == 'p');
|
|
|
462 |
}
|
|
|
463 |
|
|
|
464 |
/**
|
|
|
465 |
* Test for background value with rgba with sufficient contrast.
|
|
|
466 |
*/
|
|
|
467 |
public function test_good_backgroundcssrgba(): void {
|
|
|
468 |
$html = '<body><p style="color:rgba(255, 255, 255, 0.75); background:fixed rgba(0, 0, 0, 0.75) center;">
|
|
|
469 |
This is contrasty enough.</p></body>';
|
|
|
470 |
$results = $this->get_checker_results($html);
|
|
|
471 |
$this->assertEmpty($results);
|
|
|
472 |
}
|
|
|
473 |
|
|
|
474 |
/**
|
|
|
475 |
* Test for calculated (12pt) text with insufficient contrast of 4.49.
|
|
|
476 |
*/
|
|
|
477 |
public function test_check_for_calculated_fail(): void {
|
|
|
478 |
$results = $this->get_checker_results($this->calculatedfail);
|
|
|
479 |
$this->assertTrue($results[0]->element->tagName == 'p');
|
|
|
480 |
}
|
|
|
481 |
|
|
|
482 |
/**
|
|
|
483 |
* Test for calculated (12pt) text with sufficient contrast of 4.81.
|
|
|
484 |
*/
|
|
|
485 |
public function test_check_for_calculated_pass(): void {
|
|
|
486 |
$results = $this->get_checker_results($this->calculatedpass);
|
|
|
487 |
$this->assertEmpty($results);
|
|
|
488 |
}
|
| 1 |
efrain |
489 |
}
|