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✏️ Editing: css_text_has_contrast_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/>.

/**
 * Class test_css_text_has_contrast 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_test
 */
class css_text_has_contrast_test extends all_checks {
    /** @var string The check type. */
    protected $checktype = 'css_text_has_contrast';

/** @var string HTML that should get flagged. */
 private $htmlfail1 = <<<EOD
 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN""http://www.w3.org/TR/REC-html40/loose.dtd">
 <html lang="en">
 <head>
 <title>OAC Testfile - Check #6 - Positive</title>
 </head>
 <body>
 This is not contrasty enough.
 </body>
 </html>
EOD;

/** @var string HTML that should get flagged. */
 private $htmlfail2 = <<<EOD
 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN""http://www.w3.org/TR/REC-html40/loose.dtd">
 <html lang="en">
 <head>
 <title>OAC Testfile - Check #6 - Positive</title>
 </head>
 <body>
 This is not contrasty enough.
 </body>
 </html>
EOD;

/** @var string HTML that should get flagged. */
 private $htmlfail3 = <<<EOD
 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN""http://www.w3.org/TR/REC-html40/loose.dtd">
 <html lang="en">
 <head>
 <title>OAC Testfile - Check #6 - Positive</title>
 </head>
 <body>
 This is not contrasty enough.
 </body>
 </html>
EOD;

/** @var string HTML that should get flagged. */
 private $htmlfail4 = <<<EOD
 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN""http://www.w3.org/TR/REC-html40/loose.dtd">
 <html lang="en">
 <head>
 <title>OAC Testfile - Check #6 - Positive</title>
 </head>
 <body>
 This is not contrasty enough.
 </body>
 </html>
EOD;

/** @var string HTML that should get flagged. */
 private $htmlfail5 = <<<EOD
 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN""http://www.w3.org/TR/REC-html40/loose.dtd">
 <html lang="en">
 <head>
 <title>OAC Testfile - Check #6 - Positive</title>
 </head>
 <body>
 This is not contrasty enough.
 </body>
 </html>
EOD;

/** @var string HTML that should get flagged. */
 private $htmlfail6 = <<<EOD
 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN""http://www.w3.org/TR/REC-html40/loose.dtd">
 <html lang="en">
 <head>
 <title>OAC Testfile - Check #6 - Positive</title>
 </head>
 <body>
 This is not contrasty enough.
 </body>
 </html>
EOD;

/** @var string HTML that should not get flagged. */
 private $htmlpass = <<<EOD
 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN""http://www.w3.org/TR/REC-html40/loose.dtd">
 <html lang="en">
 <head>
 <title>OAC Testfile - Check #6 - Positive</title>
 </head>
 <body>
 This is contrasty enough.
 </body>
 </html>
EOD;

/** @var string HTML that should get flagged. */
 private $namecolours = <<<EOD
 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN""http://www.w3.org/TR/REC-html40/loose.dtd">
 <html lang="en">
 <head>
 <title>OAC Testfile - Check #6 - Positive</title>
 </head>
 <body>
 This is not contrasty enough.
 </body>
 </html>
EOD;

/** @var string HTML with invalid colour names. */
 private $invalidcolours = <<<EOD
 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN""http://www.w3.org/TR/REC-html40/loose.dtd">
 <html lang="en">
 <head>
 <title>OAC Testfile - Check #6 - Positive</title>
 </head>
 <body>
 This is not contrasty enough.
 </body>
 </html>
EOD;

/** @var string HTML with invalid colour numeric values. */
 private $invalidvalue = <<<EOD
 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN""http://www.w3.org/TR/REC-html40/loose.dtd">
 <html lang="en">
 <head>
 <title>OAC Testfile - Check #6 - Positive</title>
 </head>
 <body>
 This is not contrasty enough.
 </body>
 </html>
EOD;

/** @var string HTML with empty colour values. */
 private $emptyvalue = <<<EOD
 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN""http://www.w3.org/TR/REC-html40/loose.dtd">
 <html lang="en">
 <head>
 <title>OAC Testfile - Check #6 - Positive</title>
 </head>
 <body>
 This is not contrasty enough.
 </body>
 </html>
EOD;

/** @var string HTML with px18 fail colour values. */
 private $px18 = <<<EOD
 <body>
 This is not contrasty enough.</body>
EOD;

/** @var string HTML with px19bold pass colour values. */
 private $px19bold = <<<EOD
 <body>
 This is contrasty enough.</body>
EOD;

/** @var string HTML with px18 pass colour values. */
 private $px18pass = <<<EOD
 <body>
 This is contrasty enough.</body>
EOD;

/** @var string HTML with medium size colour values. */
 private $mediumfail = <<<EOD
 <body>
 This is not contrasty enough.</body>
EOD;

/** @var string HTML with px18 colour values. */
 private $mediumpass = <<<EOD
 <body>
 This is contrasty enough.</body>
EOD;

/** @var string HTML with larger fail colour values. */
 private $largerfail = <<<EOD
 <body>
 This is not contrasty enough.</body>
EOD;

/** @var string HTML with px18 colour values. */
 private $largerpass = <<<EOD
 <body>
 This is contrasty enough.</body>
EOD;

/** @var string HTML with px18 colour values. */
 private $largerboldpass = <<<EOD
 <body>
 This is contrasty enough.</body>
EOD;

/**
     * Test for the area assign intro
     */
    public function test_check() {
        $results = $this->get_checker_results($this->htmlfail1);
        $this->assertTrue($results[0]->element->tagName == 'p');

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

$results = $this->get_checker_results($this->htmlfail3);
        $this->assertTrue($results[0]->element->tagName == 'p');

$results = $this->get_checker_results($this->htmlfail4);
        $this->assertTrue($results[0]->element->tagName == 'p');

$results = $this->get_checker_results($this->htmlfail5);
        $this->assertTrue($results[0]->element->tagName == 'p');

$results = $this->get_checker_results($this->htmlfail6);
        $this->assertTrue($results[0]->element->tagName == 'p');

$results = $this->get_checker_results($this->htmlpass);
        $this->assertEmpty($results);
    }

/**
     * Test with valid colour names.
     */
    public function test_check_for_namedcolours() {
        $results = $this->get_checker_results($this->namecolours);
        $this->assertTrue($results[0]->element->tagName == 'p');
    }

/**
     * Test with invalid colour names.
     */
    public function test_check_for_invalidcolours() {
        $results = $this->get_checker_results($this->invalidcolours);
        $this->assertTrue($results[0]->element->tagName == 'p');
    }

/**
     * Test with invalid colour numeric values.
     */
    public function test_check_for_invalidvalues() {
        $results = $this->get_checker_results($this->invalidvalue);
        $this->assertTrue($results[0]->element->tagName == 'p');
    }

/**
     * Test with empty colour values.
     */
    public function test_check_for_emptyvalues() {
        $results = $this->get_checker_results($this->emptyvalue);
        $this->assertEmpty($results);
    }

/**
     * Test for text px18 with insufficient contrast of 4.49.
     */
    public function test_check_for_px18_fail() {
        $results = $this->get_checker_results($this->px18);
        $this->assertTrue($results[0]->element->tagName == 'p');
    }

/**
     * Test for text px19 bold with sufficient contrast of 4.49.
     */
    public function test_check_for_px19bold_pass() {
        $results = $this->get_checker_results($this->px19bold);
        $this->assertEmpty($results);
    }

/**
     * Test for text px18 with sufficient contrast of 4.81.
     */
    public function test_check_for_px18_pass() {
        $results = $this->get_checker_results($this->px18pass);
        $this->assertEmpty($results);
    }

/**
     * Test for medium (12pt) text with insufficient contrast of 4.49.
     */
    public function test_check_for_medium_fail() {
        $results = $this->get_checker_results($this->mediumfail);
        $this->assertTrue($results[0]->element->tagName == 'p');
    }

/**
     * Test for medium (12pt) text with sufficient contrast of 4.81.
     */
    public function test_check_for_medium_pass() {
        $results = $this->get_checker_results($this->mediumpass);
        $this->assertEmpty($results);
    }

/**
     * Test for larger (14pt) text with insufficient contrast of 2.94.
     */
    public function test_check_for_larger_fail() {
        $results = $this->get_checker_results($this->largerfail);
        $this->assertTrue($results[0]->element->tagName == 'p');
    }

/**
     * Test for larger (14pt) text with insufficient contrast of 3.02.
     */
    public function test_check_for_larger_pass() {
        $results = $this->get_checker_results($this->largerpass);
        $this->assertTrue($results[0]->element->tagName == 'p');
    }

/**
     * Test for larger (14pt) bold text with sufficient contrast of 3.02.
     */
    public function test_check_for_largerbold_pass() {
        $results = $this->get_checker_results($this->largerboldpass);
        $this->assertEmpty($results);
    }
}

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