Proyectos de Subversion Moodle

<?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/>.

/**

 * Unit tests for (some of) mod/quiz/locallib.php.

 *

 * @package    mod_quiz

 * @category   test

 * @copyright  2008 Tim Hunt

 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later

 */

namespace mod_quiz;

use mod_quiz\output\renderer;

use mod_quiz\question\display_options;

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

global $CFG;

require_once($CFG->dirroot . '/mod/quiz/locallib.php');

require_once($CFG->dirroot . '/mod/quiz/tests/quiz_question_helper_test_trait.php');

/**

 * Unit tests for (some of) mod/quiz/locallib.php.

 *

 * @copyright  2008 Tim Hunt

 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later

 */

class locallib_test extends \advanced_testcase {

    use \quiz_question_helper_test_trait;

    public function test_quiz_rescale_grade(): void {

        $quiz = new \stdClass();

        $quiz->decimalpoints = 2;

        $quiz->questiondecimalpoints = 3;

        $quiz->grade = 10;

        $quiz->sumgrades = 10;

        $this->assertEquals(quiz_rescale_grade(0.12345678, $quiz, false), 0.12345678);

        $this->assertEquals(quiz_rescale_grade(0.12345678, $quiz, true), format_float(0.12, 2));

        $this->assertEquals(quiz_rescale_grade(0.12345678, $quiz, 'question'),

            format_float(0.123, 3));

        $quiz->sumgrades = 5;

        $this->assertEquals(quiz_rescale_grade(0.12345678, $quiz, false), 0.24691356);

        $this->assertEquals(quiz_rescale_grade(0.12345678, $quiz, true), format_float(0.25, 2));

        $this->assertEquals(quiz_rescale_grade(0.12345678, $quiz, 'question'),

            format_float(0.247, 3));

    }

    public function quiz_attempt_state_data_provider() {

        return [

            [quiz_attempt::IN_PROGRESS, null, null, display_options::DURING],

            [quiz_attempt::FINISHED, -90, null, display_options::IMMEDIATELY_AFTER],

            [quiz_attempt::FINISHED, -7200, null, display_options::LATER_WHILE_OPEN],

            [quiz_attempt::FINISHED, -7200, 3600, display_options::LATER_WHILE_OPEN],

            [quiz_attempt::FINISHED, -30, 30, display_options::IMMEDIATELY_AFTER],

            [quiz_attempt::FINISHED, -90, -30, display_options::AFTER_CLOSE],

            [quiz_attempt::FINISHED, -7200, -3600, display_options::AFTER_CLOSE],

            [quiz_attempt::FINISHED, -90, -3600, display_options::AFTER_CLOSE],

            [quiz_attempt::ABANDONED, -10000000, null, display_options::LATER_WHILE_OPEN],

            [quiz_attempt::ABANDONED, -7200, 3600, display_options::LATER_WHILE_OPEN],

            [quiz_attempt::ABANDONED, -7200, -3600, display_options::AFTER_CLOSE],

        ];

    }

    /**

     * @dataProvider quiz_attempt_state_data_provider

     *

     * @param string $attemptstate as in the quiz_attempts.state DB column.

     * @param int|null $relativetimefinish time relative to now when the attempt finished, or null for 0.

     * @param int|null $relativetimeclose time relative to now when the quiz closes, or null for 0.

     * @param int $expectedstate expected result. One of the display_options constants.

     * @covers ::quiz_attempt_state

     */

    public function test_quiz_attempt_state(string $attemptstate,

            ?int $relativetimefinish, ?int $relativetimeclose, int $expectedstate): void {

        $attempt = new \stdClass();

        $attempt->state = $attemptstate;

        if ($relativetimefinish === null) {

            $attempt->timefinish = 0;

        } else {

            $attempt->timefinish = time() + $relativetimefinish;

        }

        $quiz = new \stdClass();

        if ($relativetimeclose === null) {

            $quiz->timeclose = 0;

        } else {

            $quiz->timeclose = time() + $relativetimeclose;

        }

        $this->assertEquals($expectedstate, quiz_attempt_state($quiz, $attempt));

    }

    /**

     * @covers ::quiz_question_tostring

     */

    public function test_quiz_question_tostring(): void {

        $question = new \stdClass();

        $question->qtype = 'multichoice';

        $question->name = 'The question name';

        $question->questiontext = '<p>What sort of <b>inequality</b> is x &lt; y<img alt="?" src="..."></p>';

        $question->questiontextformat = FORMAT_HTML;

        $summary = quiz_question_tostring($question);

        $this->assertEquals('<span class="questionname">The question name</span> ' .

                '<span class="questiontext">What sort of INEQUALITY is x &lt; y[?]' . "\n" . '</span>', $summary);

    }

    /**

     * @covers ::quiz_question_tostring

     */

    public function test_quiz_question_tostring_does_not_filter(): void {

        $question = new \stdClass();

        $question->qtype = 'multichoice';

        $question->name = 'The question name';

        $question->questiontext = '<p>No emoticons here :-)</p>';

        $question->questiontextformat = FORMAT_HTML;

        $summary = quiz_question_tostring($question);

        $this->assertEquals('<span class="questionname">The question name</span> ' .

                '<span class="questiontext">No emoticons here :-)' . "\n</span>", $summary);

    }

    /**

     * Test quiz_view

     * @return void

     */

    public function test_quiz_view(): void {

        global $CFG;

        $CFG->enablecompletion = 1;

        $this->resetAfterTest();

        $this->setAdminUser();

        // Setup test data.

        $course = $this->getDataGenerator()->create_course(['enablecompletion' => 1]);

        $quiz = $this->getDataGenerator()->create_module('quiz', ['course' => $course->id],

                                                            ['completion' => 2, 'completionview' => 1]);

        $context = \context_module::instance($quiz->cmid);

        $cm = get_coursemodule_from_instance('quiz', $quiz->id);

        // Trigger and capture the event.

        $sink = $this->redirectEvents();

        quiz_view($quiz, $course, $cm, $context);

        $events = $sink->get_events();

        // 2 additional events thanks to completion.

        $this->assertCount(3, $events);

        $event = array_shift($events);

        // Checking that the event contains the expected values.

        $this->assertInstanceOf('\mod_quiz\event\course_module_viewed', $event);

        $this->assertEquals($context, $event->get_context());

        $moodleurl = new \moodle_url('/mod/quiz/view.php', ['id' => $cm->id]);

        $this->assertEquals($moodleurl, $event->get_url());

        $this->assertEventContextNotUsed($event);

        $this->assertNotEmpty($event->get_name());

        // Check completion status.

        $completion = new \completion_info($course);

        $completiondata = $completion->get_data($cm);

        $this->assertEquals(1, $completiondata->completionstate);

    }

    /**

     * Return false when there are not overrides for this quiz instance.

     */

    public function test_quiz_is_overriden_calendar_event_no_override(): void {

        global $CFG, $DB;

        $this->resetAfterTest();

        $this->setAdminUser();

        $generator = $this->getDataGenerator();

        $user = $generator->create_user();

        $course = $generator->create_course();

        $quizgenerator = $generator->get_plugin_generator('mod_quiz');

        $quiz = $quizgenerator->create_instance(['course' => $course->id]);

        $event = new \calendar_event((object)[

            'modulename' => 'quiz',

            'instance' => $quiz->id,

            'userid' => $user->id

        ]);

        $this->assertFalse(quiz_is_overriden_calendar_event($event));

    }

    /**

     * Return false if the given event isn't an quiz module event.

     */

    public function test_quiz_is_overriden_calendar_event_no_module_event(): void {

        global $CFG, $DB;

        $this->resetAfterTest();

        $this->setAdminUser();

        $generator = $this->getDataGenerator();

        $user = $generator->create_user();

        $course = $generator->create_course();

        $quizgenerator = $generator->get_plugin_generator('mod_quiz');

        $quiz = $quizgenerator->create_instance(['course' => $course->id]);

        $event = new \calendar_event((object)[

            'userid' => $user->id

        ]);

        $this->assertFalse(quiz_is_overriden_calendar_event($event));

    }

    /**

     * Return false if there is overrides for this use but they belong to another quiz

     * instance.

     */

    public function test_quiz_is_overriden_calendar_event_different_quiz_instance(): void {

        global $CFG, $DB;

        $this->resetAfterTest();

        $this->setAdminUser();

        $generator = $this->getDataGenerator();

        $user = $generator->create_user();

        $course = $generator->create_course();

        $quizgenerator = $generator->get_plugin_generator('mod_quiz');

        $quiz = $quizgenerator->create_instance(['course' => $course->id]);

        $quiz2 = $quizgenerator->create_instance(['course' => $course->id]);

        $event = new \calendar_event((object) [

            'modulename' => 'quiz',

            'instance' => $quiz->id,

            'userid' => $user->id

        ]);

        $record = (object) [

            'quiz' => $quiz2->id,

            'userid' => $user->id

        ];

        $DB->insert_record('quiz_overrides', $record);

        $this->assertFalse(quiz_is_overriden_calendar_event($event));

    }

    /**

     * Return true if there is a user override for this event and quiz instance.

     */

    public function test_quiz_is_overriden_calendar_event_user_override(): void {

        global $CFG, $DB;

        $this->resetAfterTest();

        $this->setAdminUser();

        $generator = $this->getDataGenerator();

        $user = $generator->create_user();

        $course = $generator->create_course();

        $quizgenerator = $generator->get_plugin_generator('mod_quiz');

        $quiz = $quizgenerator->create_instance(['course' => $course->id]);

        $event = new \calendar_event((object) [

            'modulename' => 'quiz',

            'instance' => $quiz->id,

            'userid' => $user->id

        ]);

        $record = (object) [

            'quiz' => $quiz->id,

            'userid' => $user->id

        ];

        $DB->insert_record('quiz_overrides', $record);

        $this->assertTrue(quiz_is_overriden_calendar_event($event));

    }

    /**

     * Return true if there is a group override for the event and quiz instance.

     */

    public function test_quiz_is_overriden_calendar_event_group_override(): void {

        global $CFG, $DB;

        $this->resetAfterTest();

        $this->setAdminUser();

        $generator = $this->getDataGenerator();

        $user = $generator->create_user();

        $course = $generator->create_course();

        $quizgenerator = $generator->get_plugin_generator('mod_quiz');

        $quiz = $quizgenerator->create_instance(['course' => $course->id]);

        $group = $this->getDataGenerator()->create_group(['courseid' => $quiz->course]);

        $groupid = $group->id;

        $userid = $user->id;

        $event = new \calendar_event((object) [

            'modulename' => 'quiz',

            'instance' => $quiz->id,

            'groupid' => $groupid

        ]);

        $record = (object) [

            'quiz' => $quiz->id,

            'groupid' => $groupid

        ];

        $DB->insert_record('quiz_overrides', $record);

        $this->assertTrue(quiz_is_overriden_calendar_event($event));

    }

    /**

     * Test test_quiz_get_user_timeclose().

     */

    public function test_quiz_get_user_timeclose(): void {

        global $DB;

        $this->resetAfterTest();

        $this->setAdminUser();

        $basetimestamp = time(); // The timestamp we will base the enddates on.

        // Create generator, course and quizzes.

        $student1 = $this->getDataGenerator()->create_user();

        $student2 = $this->getDataGenerator()->create_user();

        $student3 = $this->getDataGenerator()->create_user();

        $teacher = $this->getDataGenerator()->create_user();

        $course = $this->getDataGenerator()->create_course();

        $quizgenerator = $this->getDataGenerator()->get_plugin_generator('mod_quiz');

        // Both quizzes close in two hours.

        $quiz1 = $quizgenerator->create_instance(['course' => $course->id, 'timeclose' => $basetimestamp + 7200]);

        $quiz2 = $quizgenerator->create_instance(['course' => $course->id, 'timeclose' => $basetimestamp + 7200]);

        $group1 = $this->getDataGenerator()->create_group(['courseid' => $course->id]);

        $group2 = $this->getDataGenerator()->create_group(['courseid' => $course->id]);

        $student1id = $student1->id;

        $student2id = $student2->id;

        $student3id = $student3->id;

        $teacherid = $teacher->id;

        // Users enrolments.

        $studentrole = $DB->get_record('role', ['shortname' => 'student']);

        $teacherrole = $DB->get_record('role', ['shortname' => 'editingteacher']);

        $this->getDataGenerator()->enrol_user($student1id, $course->id, $studentrole->id, 'manual');

        $this->getDataGenerator()->enrol_user($student2id, $course->id, $studentrole->id, 'manual');

        $this->getDataGenerator()->enrol_user($student3id, $course->id, $studentrole->id, 'manual');

        $this->getDataGenerator()->enrol_user($teacherid, $course->id, $teacherrole->id, 'manual');

        // Create groups.

        $group1 = $this->getDataGenerator()->create_group(['courseid' => $course->id]);

        $group2 = $this->getDataGenerator()->create_group(['courseid' => $course->id]);

        $group1id = $group1->id;

        $group2id = $group2->id;

        $this->getDataGenerator()->create_group_member(['userid' => $student1id, 'groupid' => $group1id]);

        $this->getDataGenerator()->create_group_member(['userid' => $student2id, 'groupid' => $group2id]);

        // Group 1 gets an group override for quiz 1 to close in three hours.

        $record1 = (object) [

            'quiz' => $quiz1->id,

            'groupid' => $group1id,

            'timeclose' => $basetimestamp + 10800 // In three hours.

        ];

        $DB->insert_record('quiz_overrides', $record1);

        // Let's test quiz 1 closes in three hours for user student 1 since member of group 1.

        // Quiz 2 closes in two hours.

        $this->setUser($student1id);

        $params = new \stdClass();

        $comparearray = [];

        $object = new \stdClass();

        $object->id = $quiz1->id;

        $object->usertimeclose = $basetimestamp + 10800; // The overriden timeclose for quiz 1.

        $comparearray[$quiz1->id] = $object;

        $object = new \stdClass();

        $object->id = $quiz2->id;

        $object->usertimeclose = $basetimestamp + 7200; // The unchanged timeclose for quiz 2.

        $comparearray[$quiz2->id] = $object;

        $this->assertEquals($comparearray, quiz_get_user_timeclose($course->id));

        // Let's test quiz 1 closes in two hours (the original value) for user student 3 since member of no group.

        $this->setUser($student3id);

        $params = new \stdClass();

        $comparearray = [];

        $object = new \stdClass();

        $object->id = $quiz1->id;

        $object->usertimeclose = $basetimestamp + 7200; // The original timeclose for quiz 1.

        $comparearray[$quiz1->id] = $object;

        $object = new \stdClass();

        $object->id = $quiz2->id;

        $object->usertimeclose = $basetimestamp + 7200; // The original timeclose for quiz 2.

        $comparearray[$quiz2->id] = $object;

        $this->assertEquals($comparearray, quiz_get_user_timeclose($course->id));

        // User 2 gets an user override for quiz 1 to close in four hours.

        $record2 = (object) [

            'quiz' => $quiz1->id,

            'userid' => $student2id,

            'timeclose' => $basetimestamp + 14400 // In four hours.

        ];

        $DB->insert_record('quiz_overrides', $record2);

        // Let's test quiz 1 closes in four hours for user student 2 since personally overriden.

        // Quiz 2 closes in two hours.

        $this->setUser($student2id);

        $comparearray = [];

        $object = new \stdClass();

        $object->id = $quiz1->id;

        $object->usertimeclose = $basetimestamp + 14400; // The overriden timeclose for quiz 1.

        $comparearray[$quiz1->id] = $object;

        $object = new \stdClass();

        $object->id = $quiz2->id;

        $object->usertimeclose = $basetimestamp + 7200; // The unchanged timeclose for quiz 2.

        $comparearray[$quiz2->id] = $object;

        $this->assertEquals($comparearray, quiz_get_user_timeclose($course->id));

        // Let's test a teacher sees the original times.

        // Quiz 1 and quiz 2 close in two hours.

        $this->setUser($teacherid);

        $comparearray = [];

        $object = new \stdClass();

        $object->id = $quiz1->id;

        $object->usertimeclose = $basetimestamp + 7200; // The unchanged timeclose for quiz 1.

        $comparearray[$quiz1->id] = $object;

        $object = new \stdClass();

        $object->id = $quiz2->id;

        $object->usertimeclose = $basetimestamp + 7200; // The unchanged timeclose for quiz 2.

        $comparearray[$quiz2->id] = $object;

        $this->assertEquals($comparearray, quiz_get_user_timeclose($course->id));

    }

    /**

     * This function creates a quiz with some standard (non-random) and some random questions.

     * The standard questions are created first and then random questions follow them.

     * So in a quiz with 3 standard question and 2 random question, the first random question is at slot 4.

     *

     * @param int $qnum Number of standard questions that should be created in the quiz.

     * @param int $randomqnum Number of random questions that should be created in the quiz.

     * @param array $questiontags Tags to be used for random questions.

     *      This is an array in the following format:

     *      [

     *          0 => ['foo', 'bar'],

     *          1 => ['baz', 'qux']

     *      ]

     * @param string[] $unusedtags Some additional tags to be created.

     * @return array An array of 2 elements: $quiz and $tagobjects.

     *      $tagobjects is an associative array of all created tag objects with its key being tag names.

     */

    private function setup_quiz_and_tags($qnum, $randomqnum, $questiontags = [], $unusedtags = []) {

        global $SITE;

        $tagobjects = [];

        // Get all the tags that need to be created.

        $alltags = [];

        foreach ($questiontags as $questiontag) {

            $alltags = array_merge($alltags, $questiontag);

        }

        $alltags = array_merge($alltags, $unusedtags);

        $alltags = array_unique($alltags);

        // Create tags.

        foreach ($alltags as $tagname) {

            $tagrecord = [

                'isstandard' => 1,

                'flag' => 0,

                'rawname' => $tagname,

                'description' => $tagname . ' desc'

            ];

            $tagobjects[$tagname] = $this->getDataGenerator()->create_tag($tagrecord);

        }

        // Create a quiz.

        $quizgenerator = $this->getDataGenerator()->get_plugin_generator('mod_quiz');

        $quiz = $quizgenerator->create_instance(['course' => $SITE->id, 'questionsperpage' => 3, 'grade' => 100.0]);

        // Create a question category in the system context.

        $questiongenerator = $this->getDataGenerator()->get_plugin_generator('core_question');

        $cat = $questiongenerator->create_question_category();

        // Setup standard questions.

        for ($i = 0; $i < $qnum; $i++) {

            $question = $questiongenerator->create_question('shortanswer', null, ['category' => $cat->id]);

            quiz_add_quiz_question($question->id, $quiz);

        }

        // Setup random questions.

        for ($i = 0; $i < $randomqnum; $i++) {

            // Just create a standard question first, so there would be enough questions to pick a random question from.

            $question = $questiongenerator->create_question('shortanswer', null, ['category' => $cat->id]);

            $tagids = [];

            if (!empty($questiontags[$i])) {

                foreach ($questiontags[$i] as $tagname) {

                    $tagids[] = $tagobjects[$tagname]->id;

                }

            }

            $this->add_random_questions($quiz->id, 0, $cat->id, 1);

        }

        return [$quiz, $tagobjects];

    }

    public function test_quiz_override_summary(): void {

        global $DB, $PAGE;

        $this->resetAfterTest();

        $generator = $this->getDataGenerator();

        /** @var mod_quiz_generator $quizgenerator */

        $quizgenerator = $generator->get_plugin_generator('mod_quiz');

        /** @var renderer $renderer */

        $renderer = $PAGE->get_renderer('mod_quiz');

        // Course with quiz and a group - plus some others, to verify they don't get counted.

        $course = $generator->create_course();

        $quiz = $quizgenerator->create_instance(['course' => $course->id, 'groupmode' => SEPARATEGROUPS]);

        $cm = get_coursemodule_from_id('quiz', $quiz->cmid, $course->id);

        $group = $generator->create_group(['courseid' => $course->id]);

        $othergroup = $generator->create_group(['courseid' => $course->id]);

        $otherquiz = $quizgenerator->create_instance(['course' => $course->id]);

        // Initial test (as admin) with no data.

        $this->setAdminUser();

        $this->assertEquals(['group' => 0, 'user' => 0, 'mode' => 'allgroups'],

                quiz_override_summary($quiz, $cm));

        $this->assertEquals(['group' => 0, 'user' => 0, 'mode' => 'onegroup'],

                quiz_override_summary($quiz, $cm, $group->id));

        // Editing teacher.

        $teacher = $generator->create_user();

        $generator->enrol_user($teacher->id, $course->id, 'editingteacher');

        // Non-editing teacher.

        $tutor = $generator->create_user();

        $generator->enrol_user($tutor->id, $course->id, 'teacher');

        $generator->create_group_member(['userid' => $tutor->id, 'groupid' => $group->id]);

        // Three students.

        $student1 = $generator->create_user();

        $generator->enrol_user($student1->id, $course->id, 'student');

        $generator->create_group_member(['userid' => $student1->id, 'groupid' => $group->id]);

        $student2 = $generator->create_user();

        $generator->enrol_user($student2->id, $course->id, 'student');

        $generator->create_group_member(['userid' => $student2->id, 'groupid' => $othergroup->id]);

        $student3 = $generator->create_user();

        $generator->enrol_user($student3->id, $course->id, 'student');

        // Initial test now users exist, but before overrides.

        // Test as teacher.

        $this->setUser($teacher);

        $this->assertEquals(['group' => 0, 'user' => 0, 'mode' => 'allgroups'],

                quiz_override_summary($quiz, $cm));

        $this->assertEquals(['group' => 0, 'user' => 0, 'mode' => 'onegroup'],

                quiz_override_summary($quiz, $cm, $group->id));

        // Test as tutor.

        $this->setUser($tutor);

        $this->assertEquals(['group' => 0, 'user' => 0, 'mode' => 'somegroups'],

                quiz_override_summary($quiz, $cm));

        $this->assertEquals(['group' => 0, 'user' => 0, 'mode' => 'onegroup'],

                quiz_override_summary($quiz, $cm, $group->id));

        $this->assertEquals('', $renderer->quiz_override_summary_links($quiz, $cm));

        // Quiz setting overrides for students 1 and 3.

        $quizgenerator->create_override(['quiz' => $quiz->id, 'userid' => $student1->id, 'attempts' => 2]);

        $quizgenerator->create_override(['quiz' => $quiz->id, 'userid' => $student3->id, 'attempts' => 2]);

        $quizgenerator->create_override(['quiz' => $quiz->id, 'groupid' => $group->id, 'attempts' => 3]);

        $quizgenerator->create_override(['quiz' => $quiz->id, 'groupid' => $othergroup->id, 'attempts' => 3]);

        $quizgenerator->create_override(['quiz' => $otherquiz->id, 'userid' => $student2->id, 'attempts' => 2]);

        // Test as teacher.

        $this->setUser($teacher);

        $this->assertEquals(['group' => 2, 'user' => 2, 'mode' => 'allgroups'],

                quiz_override_summary($quiz, $cm));

        $this->assertEquals('Settings overrides exist (Groups: 2, Users: 2)',

                // Links checked by Behat, so strip them for these tests.

                html_to_text($renderer->quiz_override_summary_links($quiz, $cm), 0, false));

        $this->assertEquals(['group' => 1, 'user' => 1, 'mode' => 'onegroup'],

                quiz_override_summary($quiz, $cm, $group->id));

        $this->assertEquals('Settings overrides exist (Groups: 1, Users: 1) for this group',

                html_to_text($renderer->quiz_override_summary_links($quiz, $cm, $group->id), 0, false));

        // Test as tutor.

        $this->setUser($tutor);

        $this->assertEquals(['group' => 1, 'user' => 1, 'mode' => 'somegroups'],

                quiz_override_summary($quiz, $cm));

        $this->assertEquals('Settings overrides exist (Groups: 1, Users: 1) for your groups',

                html_to_text($renderer->quiz_override_summary_links($quiz, $cm), 0, false));

        $this->assertEquals(['group' => 1, 'user' => 1, 'mode' => 'onegroup'],

                quiz_override_summary($quiz, $cm, $group->id));

        $this->assertEquals('Settings overrides exist (Groups: 1, Users: 1) for this group',

                html_to_text($renderer->quiz_override_summary_links($quiz, $cm, $group->id), 0, false));

        // Now set the quiz to be group mode: no groups, and re-test as tutor.

        // In this case, the tutor should see all groups.

        $DB->set_field('course_modules', 'groupmode', NOGROUPS, ['id' => $cm->id]);

        $cm = get_coursemodule_from_id('quiz', $quiz->cmid, $course->id);

        $this->assertEquals(['group' => 2, 'user' => 2, 'mode' => 'allgroups'],

                quiz_override_summary($quiz, $cm));

        $this->assertEquals('Settings overrides exist (Groups: 2, Users: 2)',

                html_to_text($renderer->quiz_override_summary_links($quiz, $cm), 0, false));

    }

    /**

     *  Test quiz_send_confirmation function.

     */

    public function test_quiz_send_confirmation(): void {

        global $CFG, $DB;

        $this->resetAfterTest();

        $this->setAdminUser();

        $this->preventResetByRollback();

        $course = $this->getDataGenerator()->create_course();

        $quizgenerator = $this->getDataGenerator()->get_plugin_generator('mod_quiz');

        $quiz = $quizgenerator->create_instance(['course' => $course->id]);

        $cm = get_coursemodule_from_instance('quiz', $quiz->id);

        $recipient = $this->getDataGenerator()->create_user(['email' => 'student@example.com']);

        // Allow recipent to receive email confirm submission.

        $studentrole = $DB->get_record('role', ['shortname' => 'student']);

        assign_capability('mod/quiz:emailconfirmsubmission', CAP_ALLOW, $studentrole->id,

            \context_course::instance($course->id), true);

        $this->getDataGenerator()->enrol_user($recipient->id, $course->id, $studentrole->id, 'manual');

        $timenow = time();

        $data = new \stdClass();

        // Course info.

        $data->courseid        = $course->id;

        $data->coursename      = $course->fullname;

        // Quiz info.

        $data->quizname        = $quiz->name;

        $data->quizurl         = $CFG->wwwroot . '/mod/quiz/view.php?id=' . $cm->id;

        $data->quizid          = $quiz->id;

        $data->quizcmid        = $quiz->cmid;

        $data->attemptid       = 1;

        $data->submissiontime = userdate($timenow);

        $sink = $this->redirectEmails();

        quiz_send_confirmation($recipient, $data, true);

        $messages = $sink->get_messages();

        $message = reset($messages);

        $this->assertStringContainsString("Thank you for submitting your answers" ,

            quoted_printable_decode($message->body));

        $sink->close();

        $sink = $this->redirectEmails();

        quiz_send_confirmation($recipient, $data, false);

        $messages = $sink->get_messages();

        $message = reset($messages);

        $this->assertStringContainsString("Your answers were submitted automatically" ,

            quoted_printable_decode($message->body));

        $sink->close();

    }

}