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📄 accesslib_has_capability_test.php(29.72 KB)
📄 accesslib_test.php(240.86 KB)
📄 adminlib_test.php(4.29 KB)
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📄 analysers_test.php(12.79 KB)
📁 analytics
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📄 behat_lib_test.php(3.25 KB)
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📄 check_test.php(1.77 KB)
📄 client_test.php(4.34 KB)
📄 collator_test.php(12.06 KB)
📄 completionlib_test.php(84.19 KB)
📄 component_test.php(44.1 KB)
📄 componentlib_test.php(6.91 KB)
📄 configonlylib_test.php(5.93 KB)
📁 content
📄 content_test.php(4.77 KB)
📁 context
📄 context_block_test.php(4.14 KB)
📄 context_helper_test.php(22.27 KB)
📄 context_test.php(3.38 KB)
📄 core_media_player_native_test.php(6.4 KB)
📄 core_renderer_template_exploit_test.php(16.56 KB)
📄 coverage.php(3.55 KB)
📄 cron_test.php(6.86 KB)
📄 csslib_test.php(1.56 KB)
📄 csvclass_test.php(5.62 KB)
📄 curl_security_helper_test.php(14.79 KB)
📄 customcontext_test.php(4.66 KB)
📄 dataformat_test.php(3.74 KB)
📄 datalib_test.php(48.36 KB)
📄 datalib_update_with_unique_index_test.php(6.06 KB)
📄 date_legacy_test.php(13.62 KB)
📄 date_test.php(25.77 KB)
📁 db
📄 editorlib_test.php(1.95 KB)
📄 encryption_test.php(8.68 KB)
📄 environment_test.php(8.49 KB)
📁 event
📄 event_course_module_instance_list_viewed.php(2.54 KB)
📄 event_course_module_viewed.php(3.14 KB)
📄 exporter_test.php(11.26 KB)
📁 external
📄 externallib_test.php(2.02 KB)
📄 filelib_test.php(77.16 KB)
📄 filestorage_zip_archive_test.php(2.55 KB)
📄 filetypes_test.php(10.06 KB)
📄 filter_manager_test.php(3.31 KB)
📄 filterlib_test.php(36.76 KB)
📁 fixtures
📄 formslib_test.php(39.94 KB)
📄 gdlib_test.php(5.68 KB)
📄 googlelib_test.php(1.6 KB)
📄 gradelib_test.php(11.96 KB)
📄 grades_external_test.php(15.04 KB)
📄 grading_external_test.php(26.33 KB)
📄 graphlib_test.php(4.61 KB)
📄 grouplib_test.php(109.11 KB)
📄 h5p_clean_orphaned_records_task_test.php(3.16 KB)
📄 html2text_test.php(7.54 KB)
📄 html_writer_test.php(9.65 KB)
📄 htmlpurifier_test.php(23.01 KB)
📄 http_client_test.php(14.94 KB)
📁 hub
📄 ip_utils_test.php(14.13 KB)
📄 jquery_test.php(1.58 KB)
📄 ldaplib_test.php(17.73 KB)
📄 licenselib_test.php(11.58 KB)
📁 lock
📄 lock_config_test.php(3.47 KB)
📄 lock_test.php(5.3 KB)
📄 markdown_test.php(2.24 KB)
📄 mathslib_test.php(13.42 KB)
📄 medialib_test.php(19.63 KB)
📄 message_test.php(12.25 KB)
📄 messageinbound_test.php(5.96 KB)
📄 messagelib_test.php(56.36 KB)
📄 minify_test.php(3.12 KB)
📄 modinfolib_test.php(54.43 KB)
📄 moodle_page_test.php(31.59 KB)
📄 moodle_url_test.php(15.64 KB)
📄 moodlelib_current_language_test.php(7.68 KB)
📄 moodlelib_test.php(237.46 KB)
📁 moodlenet
📄 myprofilelib_test.php(12.36 KB)
📁 navigation
📄 navigationlib_test.php(31.79 KB)
📄 notification_test.php(4.35 KB)
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📄 oauth2_test.php(23.06 KB)
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📄 outputcomponents_test.php(33.25 KB)
📄 outputfactories_test.php(6.78 KB)
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📄 pdflib_test.php(3.18 KB)
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📄 persistent_test.php(30.53 KB)
📄 phpxmlrpc_test.php(2.04 KB)
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📄 portfoliolib_test.php(8.4 KB)
📄 progress_display_test.php(3.75 KB)
📄 progress_test.php(14.48 KB)
📄 qrcode_test.php(1.68 KB)
📄 questionlib_test.php(100.67 KB)
📄 regex_test.php(1.55 KB)
📄 report_helper_test.php(2.62 KB)
📄 requirejs_test.php(2.22 KB)
📄 rsslib_test.php(7.35 KB)
📄 rtlcss_test.php(56.86 KB)
📄 sample_questions.ser(141.76 KB)
📄 sample_questions.xml(102.62 KB)
📄 sample_questions_with_old_image_tag.ser(4.85 KB)
📄 sample_questions_with_old_image_tag.xml(4.08 KB)
📄 sample_questions_wrong.xml(102.57 KB)
📄 scss_test.php(4.26 KB)
📄 session_manager_test.php(34.79 KB)
📄 session_redis_test.php(13.56 KB)
📄 sessionlib_test.php(12.32 KB)
📄 setuplib_test.php(20.17 KB)
📄 statslib_test.php(26.68 KB)
📄 string_manager_standard_test.php(10.18 KB)
📄 tablelib_test.php(25.12 KB)
📁 task
📄 text_test.php(26.53 KB)
📄 theme_config_test.php(9.94 KB)
📄 update_api_test.php(6.62 KB)
📄 update_checker_test.php(10.82 KB)
📄 update_code_manager_test.php(8.88 KB)
📄 update_validator_test.php(18.28 KB)
📄 upgrade_util_test.php(5.32 KB)
📄 upgradelib_test.php(69.6 KB)
📄 user_menu_test.php(3.75 KB)
📄 user_test.php(34.34 KB)
📄 useragent_test.php(83.82 KB)
📄 weblib_format_text_test.php(11.91 KB)
📄 weblib_test.php(43.44 KB)
📄 xhprof_test.php(3.14 KB)
📄 xhtml_container_stack_test.php(4.05 KB)
📄 xmlize_test.php(2.55 KB)

Editing: datalib_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/>.

namespace core;

/**
 * Test for various bits of datalib.php.
 *
 * @package   core
 * @category  test
 * @copyright 2012 The Open University
 * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */
class datalib_test extends \advanced_testcase {
    protected function normalise_sql($sort) {
        return preg_replace('~\s+~', ' ', $sort);
    }

protected function assert_same_sql($expected, $actual) {
        $this->assertSame($this->normalise_sql($expected), $this->normalise_sql($actual));
    }

/**
     * Do a test of the user search SQL with database users.
     */
    public function test_users_search_sql() {
        global $DB;
        $this->resetAfterTest();

// Set up test users.
        $user1 = array(
            'username' => 'usernametest1',
            'idnumber' => 'idnumbertest1',
            'firstname' => 'First Name User Test 1',
            'lastname' => 'Last Name User Test 1',
            'email' => 'usertest1@example.com',
            'address' => '2 Test Street Perth 6000 WA',
            'phone1' => '01010101010',
            'phone2' => '02020203',
            'department' => 'Department of user 1',
            'institution' => 'Institution of user 1',
            'description' => 'This is a description for user 1',
            'descriptionformat' => FORMAT_MOODLE,
            'city' => 'Perth',
            'country' => 'AU'
            );
        $user1 = self::getDataGenerator()->create_user($user1);
        $user2 = array(
            'username' => 'usernametest2',
            'idnumber' => 'idnumbertest2',
            'firstname' => 'First Name User Test 2',
            'lastname' => 'Last Name User Test 2',
            'email' => 'usertest2@example.com',
            'address' => '222 Test Street Perth 6000 WA',
            'phone1' => '01010101010',
            'phone2' => '02020203',
            'department' => 'Department of user 2',
            'institution' => 'Institution of user 2',
            'description' => 'This is a description for user 2',
            'descriptionformat' => FORMAT_MOODLE,
            'city' => 'Perth',
            'country' => 'AU'
            );
        $user2 = self::getDataGenerator()->create_user($user2);

// Search by name (anywhere in text).
        list($sql, $params) = users_search_sql('User Test 2', '');
        $results = $DB->get_records_sql("SELECT id FROM {user} WHERE $sql ORDER BY username", $params);
        $this->assertFalse(array_key_exists($user1->id, $results));
        $this->assertTrue(array_key_exists($user2->id, $results));

// Search by (most of) full name.
        list($sql, $params) = users_search_sql('First Name User Test 2 Last Name User', '');
        $results = $DB->get_records_sql("SELECT id FROM {user} WHERE $sql ORDER BY username", $params);
        $this->assertFalse(array_key_exists($user1->id, $results));
        $this->assertTrue(array_key_exists($user2->id, $results));

// Search by name (start of text) valid or not.
        list($sql, $params) = users_search_sql('User Test 2', '', false);
        $results = $DB->get_records_sql("SELECT id FROM {user} WHERE $sql ORDER BY username", $params);
        $this->assertEquals(0, count($results));
        list($sql, $params) = users_search_sql('First Name User Test 2', '', false);
        $results = $DB->get_records_sql("SELECT id FROM {user} WHERE $sql ORDER BY username", $params);
        $this->assertFalse(array_key_exists($user1->id, $results));
        $this->assertTrue(array_key_exists($user2->id, $results));

// Search by extra fields included or not (address).
        list($sql, $params) = users_search_sql('Test Street', '', true);
        $results = $DB->get_records_sql("SELECT id FROM {user} WHERE $sql ORDER BY username", $params);
        $this->assertCount(0, $results);
        list($sql, $params) = users_search_sql('Test Street', '', true, array('address'));
        $results = $DB->get_records_sql("SELECT id FROM {user} WHERE $sql ORDER BY username", $params);
        $this->assertCount(2, $results);

// Exclude user.
        list($sql, $params) = users_search_sql('User Test', '', true, array(), array($user1->id));
        $results = $DB->get_records_sql("SELECT id FROM {user} WHERE $sql ORDER BY username", $params);
        $this->assertFalse(array_key_exists($user1->id, $results));
        $this->assertTrue(array_key_exists($user2->id, $results));

// Include only user.
        list($sql, $params) = users_search_sql('User Test', '', true, array(), array(), array($user1->id));
        $results = $DB->get_records_sql("SELECT id FROM {user} WHERE $sql ORDER BY username", $params);
        $this->assertTrue(array_key_exists($user1->id, $results));
        $this->assertFalse(array_key_exists($user2->id, $results));

// Join with another table and use different prefix.
        set_user_preference('amphibian', 'frog', $user1);
        set_user_preference('amphibian', 'salamander', $user2);
        list($sql, $params) = users_search_sql('User Test 1', 'qq');
        $results = $DB->get_records_sql("
                SELECT up.id, up.value
                  FROM {user} qq
                  JOIN {user_preferences} up ON up.userid = qq.id
                 WHERE up.name = :prefname
                       AND $sql", array_merge(array('prefname' => 'amphibian'), $params));
        $this->assertEquals(1, count($results));
        foreach ($results as $record) {
            $this->assertSame('frog', $record->value);
        }

// Join with another table and include other table fields in search.
        set_user_preference('reptile', 'snake', $user1);
        set_user_preference('reptile', 'lizard', $user2);
        list($sql, $params) = users_search_sql('snake', 'qq', true, ['up.value']);
        $results = $DB->get_records_sql("
                SELECT up.id, up.value
                  FROM {user} qq
                  JOIN {user_preferences} up ON up.userid = qq.id
                 WHERE up.name = :prefname
                       AND $sql", array_merge(array('prefname' => 'reptile'), $params));
        $this->assertEquals(1, count($results));
        foreach ($results as $record) {
            $this->assertSame('snake', $record->value);
        }
    }

public function test_users_order_by_sql_simple() {
        list($sort, $params) = users_order_by_sql();
        $this->assert_same_sql('lastname, firstname, id', $sort);
        $this->assertEquals(array(), $params);
    }

public function test_users_order_by_sql_table_prefix() {
        list($sort, $params) = users_order_by_sql('u');
        $this->assert_same_sql('u.lastname, u.firstname, u.id', $sort);
        $this->assertEquals(array(), $params);
    }

public function test_users_order_by_sql_search_no_extra_fields() {
        global $CFG, $DB;
        $this->resetAfterTest(true);

$CFG->showuseridentity = '';

list($sort, $params) = users_order_by_sql('', 'search', \context_system::instance());
        $this->assert_same_sql('CASE WHEN
                    ' . $DB->sql_fullname() . ' = :usersortexact1 OR
                    LOWER(firstname) = LOWER(:usersortexact2) OR
                    LOWER(lastname) = LOWER(:usersortexact3)
                THEN 0 ELSE 1 END, lastname, firstname, id', $sort);
        $this->assertEquals(array('usersortexact1' => 'search', 'usersortexact2' => 'search',
                'usersortexact3' => 'search'), $params);
    }

public function test_users_order_by_sql_search_with_extra_fields_and_prefix() {
        global $CFG, $DB;
        $this->resetAfterTest();

$CFG->showuseridentity = 'email,idnumber';
        $this->setAdminUser();

list($sort, $params) = users_order_by_sql('u', 'search', \context_system::instance());
        $this->assert_same_sql('CASE WHEN
                    ' . $DB->sql_fullname('u.firstname', 'u.lastname') . ' = :usersortexact1 OR
                    LOWER(u.firstname) = LOWER(:usersortexact2) OR
                    LOWER(u.lastname) = LOWER(:usersortexact3) OR
                    LOWER(u.email) = LOWER(:usersortexact4) OR
                    LOWER(u.idnumber) = LOWER(:usersortexact5)
                THEN 0 ELSE 1 END, u.lastname, u.firstname, u.id', $sort);
        $this->assertEquals(array('usersortexact1' => 'search', 'usersortexact2' => 'search',
                'usersortexact3' => 'search', 'usersortexact4' => 'search', 'usersortexact5' => 'search'), $params);
    }

public function test_users_order_by_sql_search_with_custom_fields(): void {
        global $CFG, $DB;
        $this->resetAfterTest();

$CFG->showuseridentity = 'email,idnumber';
        $this->setAdminUser();

list($sort, $params) =
                users_order_by_sql('u', 'search', \context_system::instance(), ['profile_field_customfield' => 'x.customfield']);
        $this->assert_same_sql('CASE WHEN
                    ' . $DB->sql_fullname('u.firstname', 'u.lastname') . ' = :usersortexact1 OR
                    LOWER(u.firstname) = LOWER(:usersortexact2) OR
                    LOWER(u.lastname) = LOWER(:usersortexact3) OR
                    LOWER(x.customfield) = LOWER(:usersortexact4)
                THEN 0 ELSE 1 END, u.lastname, u.firstname, u.id', $sort);
        $this->assertEquals(array('usersortexact1' => 'search', 'usersortexact2' => 'search',
                'usersortexact3' => 'search', 'usersortexact4' => 'search'), $params);
    }

public function test_get_admin() {
        global $CFG, $DB;
        $this->resetAfterTest();

$this->assertSame('2', $CFG->siteadmins); // Admin always has id 2 in new installs.
        $defaultadmin = get_admin();
        $this->assertEquals($defaultadmin->id, 2);

unset_config('siteadmins');
        $this->assertFalse(get_admin());

set_config('siteadmins', -1);
        $this->assertFalse(get_admin());

$user1 = $this->getDataGenerator()->create_user();
        $user2 = $this->getDataGenerator()->create_user();

set_config('siteadmins', $user1->id.','.$user2->id);
        $admin = get_admin();
        $this->assertEquals($user1->id, $admin->id);

set_config('siteadmins', '-1,'.$user2->id.','.$user1->id);
        $admin = get_admin();
        $this->assertEquals($user2->id, $admin->id);

$odlread = $DB->perf_get_reads();
        get_admin(); // No DB queries on repeated call expected.
        get_admin();
        get_admin();
        $this->assertEquals($odlread, $DB->perf_get_reads());
    }

public function test_get_admins() {
        global $CFG, $DB;
        $this->resetAfterTest();

$this->assertSame('2', $CFG->siteadmins); // Admin always has id 2 in new installs.

$user1 = $this->getDataGenerator()->create_user();
        $user2 = $this->getDataGenerator()->create_user();
        $user3 = $this->getDataGenerator()->create_user();
        $user4 = $this->getDataGenerator()->create_user();

$admins = get_admins();
        $this->assertCount(1, $admins);
        $admin = reset($admins);
        $this->assertTrue(isset($admins[$admin->id]));
        $this->assertEquals(2, $admin->id);

unset_config('siteadmins');
        $this->assertSame(array(), get_admins());

set_config('siteadmins', -1);
        $this->assertSame(array(), get_admins());

set_config('siteadmins', '-1,'.$user2->id.','.$user1->id.','.$user3->id);
        $this->assertEquals(array($user2->id=>$user2, $user1->id=>$user1, $user3->id=>$user3), get_admins());

$odlread = $DB->perf_get_reads();
        get_admins(); // This should make just one query.
        $this->assertEquals($odlread+1, $DB->perf_get_reads());
    }

public function test_get_course() {
        global $DB, $PAGE, $SITE;
        $this->resetAfterTest();

// First test course will be current course ($COURSE).
        $course1obj = $this->getDataGenerator()->create_course(array('shortname' => 'FROGS'));
        $PAGE->set_course($course1obj);

// Second test course is not current course.
        $course2obj = $this->getDataGenerator()->create_course(array('shortname' => 'ZOMBIES'));

// Check it does not make any queries when requesting the $COURSE/$SITE.
        $before = $DB->perf_get_queries();
        $result = get_course($course1obj->id);
        $this->assertEquals($before, $DB->perf_get_queries());
        $this->assertSame('FROGS', $result->shortname);
        $result = get_course($SITE->id);
        $this->assertEquals($before, $DB->perf_get_queries());

// Check it makes 1 query to request other courses.
        $result = get_course($course2obj->id);
        $this->assertSame('ZOMBIES', $result->shortname);
        $this->assertEquals($before + 1, $DB->perf_get_queries());
    }

/**
     * Test that specifying fields when calling get_courses always returns required fields "id, category, visible"
     */
    public function test_get_courses_with_fields(): void {
        $this->resetAfterTest();

$category = $this->getDataGenerator()->create_category();
        $course = $this->getDataGenerator()->create_course(['category' => $category->id]);

// Specify "id" only.
        $courses = get_courses($category->id, 'c.sortorder', 'c.id');
        $this->assertCount(1, $courses);
        $this->assertEquals((object) [
            'id' => $course->id,
            'category' => $course->category,
            'visible' => $course->visible,
        ], reset($courses));

// Specify some optional fields.
        $courses = get_courses($category->id, 'c.sortorder', 'c.id, c.shortname, c.fullname');
        $this->assertCount(1, $courses);
        $this->assertEquals((object) [
            'id' => $course->id,
            'category' => $course->category,
            'visible' => $course->visible,
            'shortname' => $course->shortname,
            'fullname' => $course->fullname,
        ], reset($courses));
    }

public function test_increment_revision_number() {
        global $DB;
        $this->resetAfterTest();

// Use one of the fields that are used with increment_revision_number().
        $course1 = $this->getDataGenerator()->create_course();
        $course2 = $this->getDataGenerator()->create_course();
        $DB->set_field('course', 'cacherev', 1, array());

$record1 = $DB->get_record('course', array('id'=>$course1->id));
        $record2 = $DB->get_record('course', array('id'=>$course2->id));
        $this->assertEquals(1, $record1->cacherev);
        $this->assertEquals(1, $record2->cacherev);

// Incrementing some lower value.
        $this->setCurrentTimeStart();
        increment_revision_number('course', 'cacherev', 'id = :id', array('id'=>$course1->id));
        $record1 = $DB->get_record('course', array('id'=>$course1->id));
        $record2 = $DB->get_record('course', array('id'=>$course2->id));
        $this->assertTimeCurrent($record1->cacherev);
        $this->assertEquals(1, $record2->cacherev);

// Incrementing in the same second.
        $rev1 = $DB->get_field('course', 'cacherev', array('id'=>$course1->id));
        $now = time();
        $DB->set_field('course', 'cacherev', $now, array('id'=>$course1->id));
        increment_revision_number('course', 'cacherev', 'id = :id', array('id'=>$course1->id));
        $rev2 = $DB->get_field('course', 'cacherev', array('id'=>$course1->id));
        $this->assertGreaterThan($rev1, $rev2);
        increment_revision_number('course', 'cacherev', 'id = :id', array('id'=>$course1->id));
        $rev3 = $DB->get_field('course', 'cacherev', array('id'=>$course1->id));
        $this->assertGreaterThan($rev2, $rev3);
        $this->assertGreaterThan($now+1, $rev3);
        increment_revision_number('course', 'cacherev', 'id = :id', array('id'=>$course1->id));
        $rev4 = $DB->get_field('course', 'cacherev', array('id'=>$course1->id));
        $this->assertGreaterThan($rev3, $rev4);
        $this->assertGreaterThan($now+2, $rev4);

// Recovering from runaway revision.
        $DB->set_field('course', 'cacherev', time()+60*60*60, array('id'=>$course2->id));
        $record2 = $DB->get_record('course', array('id'=>$course2->id));
        $this->assertGreaterThan(time(), $record2->cacherev);
        $this->setCurrentTimeStart();
        increment_revision_number('course', 'cacherev', 'id = :id', array('id'=>$course2->id));
        $record2b = $DB->get_record('course', array('id'=>$course2->id));
        $this->assertTimeCurrent($record2b->cacherev);

// Update all revisions.
        $DB->set_field('course', 'cacherev', 1, array());
        $this->setCurrentTimeStart();
        increment_revision_number('course', 'cacherev', '');
        $record1 = $DB->get_record('course', array('id'=>$course1->id));
        $record2 = $DB->get_record('course', array('id'=>$course2->id));
        $this->assertTimeCurrent($record1->cacherev);
        $this->assertEquals($record1->cacherev, $record2->cacherev);
    }

public function test_get_coursemodule_from_id() {
        global $CFG;

$this->resetAfterTest();
        $this->setAdminUser(); // Some generators have bogus access control.

$this->assertFileExists("$CFG->dirroot/mod/folder/lib.php");
        $this->assertFileExists("$CFG->dirroot/mod/glossary/lib.php");

$course1 = $this->getDataGenerator()->create_course();
        $course2 = $this->getDataGenerator()->create_course();

$folder1a = $this->getDataGenerator()->create_module('folder', array('course' => $course1, 'section' => 3));
        $folder1b = $this->getDataGenerator()->create_module('folder', array('course' => $course1));
        $glossary1 = $this->getDataGenerator()->create_module('glossary', array('course' => $course1));

$folder2 = $this->getDataGenerator()->create_module('folder', array('course' => $course2));

$cm = get_coursemodule_from_id('folder', $folder1a->cmid);
        $this->assertInstanceOf('stdClass', $cm);
        $this->assertSame('folder', $cm->modname);
        $this->assertSame($folder1a->id, $cm->instance);
        $this->assertSame($folder1a->course, $cm->course);
        $this->assertObjectNotHasAttribute('sectionnum', $cm);

$this->assertEquals($cm, get_coursemodule_from_id('', $folder1a->cmid));
        $this->assertEquals($cm, get_coursemodule_from_id('folder', $folder1a->cmid, $course1->id));
        $this->assertEquals($cm, get_coursemodule_from_id('folder', $folder1a->cmid, 0));
        $this->assertFalse(get_coursemodule_from_id('folder', $folder1a->cmid, -10));

$cm2 = get_coursemodule_from_id('folder', $folder1a->cmid, 0, true);
        $this->assertEquals(3, $cm2->sectionnum);
        unset($cm2->sectionnum);
        $this->assertEquals($cm, $cm2);

$this->assertFalse(get_coursemodule_from_id('folder', -11));

try {
            get_coursemodule_from_id('folder', -11, 0, false, MUST_EXIST);
            $this->fail('dml_missing_record_exception expected');
        } catch (\moodle_exception $e) {
            $this->assertInstanceOf('dml_missing_record_exception', $e);
        }

try {
            get_coursemodule_from_id('', -11, 0, false, MUST_EXIST);
            $this->fail('dml_missing_record_exception expected');
        } catch (\moodle_exception $e) {
            $this->assertInstanceOf('dml_missing_record_exception', $e);
        }

try {
            get_coursemodule_from_id('a b', $folder1a->cmid, 0, false, MUST_EXIST);
            $this->fail('coding_exception expected');
        } catch (\moodle_exception $e) {
            $this->assertInstanceOf('coding_exception', $e);
        }

try {
            get_coursemodule_from_id('abc', $folder1a->cmid, 0, false, MUST_EXIST);
            $this->fail('dml_read_exception expected');
        } catch (\moodle_exception $e) {
            $this->assertInstanceOf('dml_read_exception', $e);
        }
    }

public function test_get_coursemodule_from_instance() {
        global $CFG;

$this->resetAfterTest();
        $this->setAdminUser(); // Some generators have bogus access control.

$this->assertFileExists("$CFG->dirroot/mod/folder/lib.php");
        $this->assertFileExists("$CFG->dirroot/mod/glossary/lib.php");

$course1 = $this->getDataGenerator()->create_course();
        $course2 = $this->getDataGenerator()->create_course();

$folder2 = $this->getDataGenerator()->create_module('folder', array('course' => $course2));

$cm = get_coursemodule_from_instance('folder', $folder1a->id);
        $this->assertInstanceOf('stdClass', $cm);
        $this->assertSame('folder', $cm->modname);
        $this->assertSame($folder1a->id, $cm->instance);
        $this->assertSame($folder1a->course, $cm->course);
        $this->assertObjectNotHasAttribute('sectionnum', $cm);

$this->assertEquals($cm, get_coursemodule_from_instance('folder', $folder1a->id, $course1->id));
        $this->assertEquals($cm, get_coursemodule_from_instance('folder', $folder1a->id, 0));
        $this->assertFalse(get_coursemodule_from_instance('folder', $folder1a->id, -10));

$cm2 = get_coursemodule_from_instance('folder', $folder1a->id, 0, true);
        $this->assertEquals(3, $cm2->sectionnum);
        unset($cm2->sectionnum);
        $this->assertEquals($cm, $cm2);

$this->assertFalse(get_coursemodule_from_instance('folder', -11));

try {
            get_coursemodule_from_instance('folder', -11, 0, false, MUST_EXIST);
            $this->fail('dml_missing_record_exception expected');
        } catch (\moodle_exception $e) {
            $this->assertInstanceOf('dml_missing_record_exception', $e);
        }

try {
            get_coursemodule_from_instance('a b', $folder1a->cmid, 0, false, MUST_EXIST);
            $this->fail('coding_exception expected');
        } catch (\moodle_exception $e) {
            $this->assertInstanceOf('coding_exception', $e);
        }

try {
            get_coursemodule_from_instance('', $folder1a->cmid, 0, false, MUST_EXIST);
            $this->fail('coding_exception expected');
        } catch (\moodle_exception $e) {
            $this->assertInstanceOf('coding_exception', $e);
        }

try {
            get_coursemodule_from_instance('abc', $folder1a->cmid, 0, false, MUST_EXIST);
            $this->fail('dml_read_exception expected');
        } catch (\moodle_exception $e) {
            $this->assertInstanceOf('dml_read_exception', $e);
        }
    }

public function test_get_coursemodules_in_course() {
        global $CFG;

$this->resetAfterTest();
        $this->setAdminUser(); // Some generators have bogus access control.

$this->assertFileExists("$CFG->dirroot/mod/folder/lib.php");
        $this->assertFileExists("$CFG->dirroot/mod/glossary/lib.php");
        $this->assertFileExists("$CFG->dirroot/mod/label/lib.php");

$course1 = $this->getDataGenerator()->create_course();
        $course2 = $this->getDataGenerator()->create_course();

$folder2 = $this->getDataGenerator()->create_module('folder', array('course' => $course2));
        $glossary2a = $this->getDataGenerator()->create_module('glossary', array('course' => $course2));
        $glossary2b = $this->getDataGenerator()->create_module('glossary', array('course' => $course2));

$modules = get_coursemodules_in_course('folder', $course1->id);
        $this->assertCount(2, $modules);

$cm = $modules[$folder1a->cmid];
        $this->assertSame('folder', $cm->modname);
        $this->assertSame($folder1a->id, $cm->instance);
        $this->assertSame($folder1a->course, $cm->course);
        $this->assertObjectNotHasAttribute('sectionnum', $cm);
        $this->assertObjectNotHasAttribute('revision', $cm);
        $this->assertObjectNotHasAttribute('display', $cm);

$cm = $modules[$folder1b->cmid];
        $this->assertSame('folder', $cm->modname);
        $this->assertSame($folder1b->id, $cm->instance);
        $this->assertSame($folder1b->course, $cm->course);
        $this->assertObjectNotHasAttribute('sectionnum', $cm);
        $this->assertObjectNotHasAttribute('revision', $cm);
        $this->assertObjectNotHasAttribute('display', $cm);

$modules = get_coursemodules_in_course('folder', $course1->id, 'revision, display');
        $this->assertCount(2, $modules);

$cm = $modules[$folder1a->cmid];
        $this->assertSame('folder', $cm->modname);
        $this->assertSame($folder1a->id, $cm->instance);
        $this->assertSame($folder1a->course, $cm->course);
        $this->assertObjectNotHasAttribute('sectionnum', $cm);
        $this->assertObjectHasAttribute('revision', $cm);
        $this->assertObjectHasAttribute('display', $cm);

$modules = get_coursemodules_in_course('label', $course1->id);
        $this->assertCount(0, $modules);

try {
            get_coursemodules_in_course('a b', $course1->id);
            $this->fail('coding_exception expected');
        } catch (\moodle_exception $e) {
            $this->assertInstanceOf('coding_exception', $e);
        }

try {
            get_coursemodules_in_course('abc', $course1->id);
            $this->fail('dml_read_exception expected');
        } catch (\moodle_exception $e) {
            $this->assertInstanceOf('dml_read_exception', $e);
        }
    }

public function test_get_all_instances_in_courses() {
        global $CFG;

$this->resetAfterTest();
        $this->setAdminUser(); // Some generators have bogus access control.

$this->assertFileExists("$CFG->dirroot/mod/folder/lib.php");
        $this->assertFileExists("$CFG->dirroot/mod/glossary/lib.php");

$course1 = $this->getDataGenerator()->create_course();
        $course2 = $this->getDataGenerator()->create_course();
        $course3 = $this->getDataGenerator()->create_course();

$folder3 = $this->getDataGenerator()->create_module('folder', array('course' => $course3));

$modules = get_all_instances_in_courses('folder', array($course1->id => $course1, $course2->id => $course2));
        $this->assertCount(3, $modules);

foreach ($modules as $cm) {
            if ($folder1a->cmid == $cm->coursemodule) {
                $folder = $folder1a;
            } else if ($folder1b->cmid == $cm->coursemodule) {
                $folder = $folder1b;
            } else if ($folder2->cmid == $cm->coursemodule) {
                $folder = $folder2;
            } else {
                $this->fail('Unexpected cm'. $cm->coursemodule);
            }
            $this->assertSame($folder->name, $cm->name);
            $this->assertSame($folder->course, $cm->course);
        }

try {
            get_all_instances_in_courses('a b', array($course1->id => $course1, $course2->id => $course2));
            $this->fail('coding_exception expected');
        } catch (\moodle_exception $e) {
            $this->assertInstanceOf('coding_exception', $e);
        }

try {
            get_all_instances_in_courses('', array($course1->id => $course1, $course2->id => $course2));
            $this->fail('coding_exception expected');
        } catch (\moodle_exception $e) {
            $this->assertInstanceOf('coding_exception', $e);
        }
    }

public function test_get_all_instances_in_course() {
        global $CFG;

$this->resetAfterTest();
        $this->setAdminUser(); // Some generators have bogus access control.

$this->assertFileExists("$CFG->dirroot/mod/folder/lib.php");
        $this->assertFileExists("$CFG->dirroot/mod/glossary/lib.php");

$course1 = $this->getDataGenerator()->create_course();
        $course2 = $this->getDataGenerator()->create_course();
        $course3 = $this->getDataGenerator()->create_course();

$folder3 = $this->getDataGenerator()->create_module('folder', array('course' => $course3));

$modules = get_all_instances_in_course('folder', $course1);
        $this->assertCount(2, $modules);

foreach ($modules as $cm) {
            if ($folder1a->cmid == $cm->coursemodule) {
                $folder = $folder1a;
            } else if ($folder1b->cmid == $cm->coursemodule) {
                $folder = $folder1b;
            } else {
                $this->fail('Unexpected cm'. $cm->coursemodule);
            }
            $this->assertSame($folder->name, $cm->name);
            $this->assertSame($folder->course, $cm->course);
        }

try {
            get_all_instances_in_course('a b', $course1);
            $this->fail('coding_exception expected');
        } catch (\moodle_exception $e) {
            $this->assertInstanceOf('coding_exception', $e);
        }

try {
            get_all_instances_in_course('', $course1);
            $this->fail('coding_exception expected');
        } catch (\moodle_exception $e) {
            $this->assertInstanceOf('coding_exception', $e);
        }
    }

/**
     * Test max courses in category
     */
    public function test_max_courses_in_category() {
        global $CFG;
        $this->resetAfterTest();

// Default settings.
        $this->assertEquals(MAX_COURSES_IN_CATEGORY, get_max_courses_in_category());

// Misc category.
        $misc = \core_course_category::get_default();
        $this->assertEquals(MAX_COURSES_IN_CATEGORY, $misc->sortorder);

$category1 = $this->getDataGenerator()->create_category();
        $category2 = $this->getDataGenerator()->create_category();

// Check category sort orders.
        $this->assertEquals(MAX_COURSES_IN_CATEGORY, \core_course_category::get($misc->id)->sortorder);
        $this->assertEquals(MAX_COURSES_IN_CATEGORY * 2, \core_course_category::get($category1->id)->sortorder);
        $this->assertEquals(MAX_COURSES_IN_CATEGORY * 3, \core_course_category::get($category2->id)->sortorder);

// Create courses.
        $course1 = $this->getDataGenerator()->create_course(['category' => $category1->id]);
        $course2 = $this->getDataGenerator()->create_course(['category' => $category2->id]);
        $course3 = $this->getDataGenerator()->create_course(['category' => $category1->id]);
        $course4 = $this->getDataGenerator()->create_course(['category' => $category2->id]);

// Check course sort orders.
        $this->assertEquals(MAX_COURSES_IN_CATEGORY * 2 + 2, get_course($course1->id)->sortorder);
        $this->assertEquals(MAX_COURSES_IN_CATEGORY * 3 + 2, get_course($course2->id)->sortorder);
        $this->assertEquals(MAX_COURSES_IN_CATEGORY * 2 + 1, get_course($course3->id)->sortorder);
        $this->assertEquals(MAX_COURSES_IN_CATEGORY * 3 + 1, get_course($course4->id)->sortorder);

// Increase max course in category.
        $CFG->maxcoursesincategory = 20000;
        $this->assertEquals(20000, get_max_courses_in_category());

// The sort order has not yet fixed, these sort orders should be the same as before.
        // Categories.
        $this->assertEquals(MAX_COURSES_IN_CATEGORY, \core_course_category::get($misc->id)->sortorder);
        $this->assertEquals(MAX_COURSES_IN_CATEGORY * 2, \core_course_category::get($category1->id)->sortorder);
        $this->assertEquals(MAX_COURSES_IN_CATEGORY * 3, \core_course_category::get($category2->id)->sortorder);
        // Courses in category 1.
        $this->assertEquals(MAX_COURSES_IN_CATEGORY * 2 + 2, get_course($course1->id)->sortorder);
        $this->assertEquals(MAX_COURSES_IN_CATEGORY * 2 + 1, get_course($course3->id)->sortorder);
        // Courses in category 2.
        $this->assertEquals(MAX_COURSES_IN_CATEGORY * 3 + 2, get_course($course2->id)->sortorder);
        $this->assertEquals(MAX_COURSES_IN_CATEGORY * 3 + 1, get_course($course4->id)->sortorder);

// Create new category so that the sort orders are applied.
        $category3 = $this->getDataGenerator()->create_category();
        // Categories.
        $this->assertEquals(20000, \core_course_category::get($misc->id)->sortorder);
        $this->assertEquals(20000 * 2, \core_course_category::get($category1->id)->sortorder);
        $this->assertEquals(20000 * 3, \core_course_category::get($category2->id)->sortorder);
        $this->assertEquals(20000 * 4, \core_course_category::get($category3->id)->sortorder);
        // Courses in category 1.
        $this->assertEquals(20000 * 2 + 2, get_course($course1->id)->sortorder);
        $this->assertEquals(20000 * 2 + 1, get_course($course3->id)->sortorder);
        // Courses in category 2.
        $this->assertEquals(20000 * 3 + 2, get_course($course2->id)->sortorder);
        $this->assertEquals(20000 * 3 + 1, get_course($course4->id)->sortorder);
    }

/**
     * Test debug message for max courses in category
     */
    public function test_debug_max_courses_in_category() {
        global $CFG;
        $this->resetAfterTest();

// Set to small value so that we can check the debug message.
        $CFG->maxcoursesincategory = 3;
        $this->assertEquals(3, get_max_courses_in_category());

$category1 = $this->getDataGenerator()->create_category();

// There is only one course, no debug message.
        $this->getDataGenerator()->create_course(['category' => $category1->id]);
        $this->assertDebuggingNotCalled();
        // There are two courses, no debug message.
        $this->getDataGenerator()->create_course(['category' => $category1->id]);
        $this->assertDebuggingNotCalled();
        // There is debug message when number of courses reaches the maximum number.
        $this->getDataGenerator()->create_course(['category' => $category1->id]);
        $this->assertDebuggingCalled("The number of courses (category id: $category1->id) has reached max number of courses " .
            "in a category (" . get_max_courses_in_category() . "). It will cause a sorting performance issue. " .
            "Please set higher value for \$CFG->maxcoursesincategory in config.php. " .
            "Please also make sure \$CFG->maxcoursesincategory * MAX_COURSE_CATEGORIES less than max integer. " .
            "See tracker issues: MDL-25669 and MDL-69573");
    }

/**
     * Tests the get_users_listing function.
     */
    public function test_get_users_listing(): void {
        global $DB;

$this->resetAfterTest();

$generator = $this->getDataGenerator();

// Set up profile field.
        $generator->create_custom_profile_field(['datatype' => 'text',
                'shortname' => 'specialid', 'name' => 'Special user id']);

// Set up the show user identity option.
        set_config('showuseridentity', 'department,profile_field_specialid');

// Get all the existing user ids (we're going to remove these from test results).
        $existingids = array_fill_keys($DB->get_fieldset_select('user', 'id', '1 = 1'), true);

// Create some test user accounts.
        $userids = [];
        foreach (['a', 'b', 'c', 'd'] as $key) {
            $record = [
                'username' => 'user_' . $key,
                'firstname' => $key . '_first',
                'lastname' => 'last_' . $key,
                'department' => 'department_' . $key,
                'profile_field_specialid' => 'special_' . $key,
                'lastaccess' => ord($key)
            ];
            $user = $generator->create_user($record);
            $userids[] = $user->id;
        }

// Check default result with no parameters.
        $results = get_users_listing();
        $results = array_diff_key($results, $existingids);

// It should return all the results in order.
        $this->assertEquals($userids, array_keys($results));

// Results should have some general fields and name fields, check some samples.
        $this->assertEquals('user_a', $results[$userids[0]]->username);
        $this->assertEquals('user_a@example.com', $results[$userids[0]]->email);
        $this->assertEquals(1, $results[$userids[0]]->confirmed);
        $this->assertEquals('a_first', $results[$userids[0]]->firstname);
        $this->assertObjectHasAttribute('firstnamephonetic', $results[$userids[0]]);

// Should not have the custom field or department because no context specified.
        $this->assertObjectNotHasAttribute('department', $results[$userids[0]]);
        $this->assertObjectNotHasAttribute('profile_field_specialid', $results[$userids[0]]);

// Check sorting.
        $results = get_users_listing('username', 'DESC');
        $results = array_diff_key($results, $existingids);
        $this->assertEquals([$userids[3], $userids[2], $userids[1], $userids[0]], array_keys($results));

// Check default fallback sort field works as expected.
        $results = get_users_listing('blah2', 'ASC');
        $results = array_diff_key($results, $existingids);
        $this->assertEquals([$userids[0], $userids[1], $userids[2], $userids[3]], array_keys($results));

// Check default fallback sort direction works as expected.
        $results = get_users_listing('lastaccess', 'blah2');
        $results = array_diff_key($results, $existingids);
        $this->assertEquals([$userids[0], $userids[1], $userids[2], $userids[3]], array_keys($results));

// Add the options to showuseridentity and check it returns those fields but only if you
        // specify a context AND have permissions.
        $results = get_users_listing('lastaccess', 'asc', 0, 0, '', '', '', '', null,
                \context_system::instance());
        $this->assertObjectNotHasAttribute('department', $results[$userids[0]]);
        $this->assertObjectNotHasAttribute('profile_field_specialid', $results[$userids[0]]);
        $this->setAdminUser();
        $results = get_users_listing('lastaccess', 'asc', 0, 0, '', '', '', '', null,
                \context_system::instance());
        $this->assertEquals('department_a', $results[$userids[0]]->department);
        $this->assertEquals('special_a', $results[$userids[0]]->profile_field_specialid);

// Check search (full name, email, username).
        $results = get_users_listing('lastaccess', 'asc', 0, 0, 'b_first last_b');
        $this->assertEquals([$userids[1]], array_keys($results));
        $results = get_users_listing('lastaccess', 'asc', 0, 0, 'c@example');
        $this->assertEquals([$userids[2]], array_keys($results));
        $results = get_users_listing('lastaccess', 'asc', 0, 0, 'user_d');
        $this->assertEquals([$userids[3]], array_keys($results));

// Check first and last initial restriction (all the test ones have same last initial).
        $results = get_users_listing('lastaccess', 'asc', 0, 0, '', 'C');
        $this->assertEquals([$userids[2]], array_keys($results));
        $results = get_users_listing('lastaccess', 'asc', 0, 0, '', '', 'L');
        $results = array_diff_key($results, $existingids);
        $this->assertEquals($userids, array_keys($results));

// Check the extra where clause, either with the 'u.' prefix or not.
        $results = get_users_listing('lastaccess', 'asc', 0, 0, '', '', '', 'id IN (:x,:y)',
                ['x' => $userids[1], 'y' => $userids[3]]);
        $results = array_diff_key($results, $existingids);
        $this->assertEquals([$userids[1], $userids[3]], array_keys($results));
        $results = get_users_listing('lastaccess', 'asc', 0, 0, '', '', '', 'u.id IN (:x,:y)',
                ['x' => $userids[1], 'y' => $userids[3]]);
        $results = array_diff_key($results, $existingids);
        $this->assertEquals([$userids[1], $userids[3]], array_keys($results));
    }

/**
     * Data provider for test_get_safe_orderby().
     *
     * @return array
     */
    public function get_safe_orderby_provider(): array {
        $orderbymap = [
            'courseid' => 'c.id',
            'somecustomvalue' => 'c.startdate, c.shortname',
            'default' => 'c.fullname',
        ];
        $orderbymapnodefault = [
            'courseid' => 'c.id',
            'somecustomvalue' => 'c.startdate, c.shortname',
        ];

return [
            'Valid option, no direction specified' => [
                $orderbymap,
                'somecustomvalue',
                '',
                ' ORDER BY c.startdate, c.shortname',
            ],
            'Valid option, valid direction specified' => [
                $orderbymap,
                'courseid',
                'DESC',
                ' ORDER BY c.id DESC',
            ],
            'Valid option, valid lowercase direction specified' => [
                $orderbymap,
                'courseid',
                'asc',
                ' ORDER BY c.id ASC',
            ],
            'Valid option, invalid direction specified' => [
                $orderbymap,
                'courseid',
                'BOOP',
                ' ORDER BY c.id',
            ],
            'Valid option, invalid lowercase direction specified' => [
                $orderbymap,
                'courseid',
                'boop',
                ' ORDER BY c.id',
            ],
            'Invalid option default fallback, with valid direction' => [
                $orderbymap,
                'thisdoesnotexist',
                'ASC',
                ' ORDER BY c.fullname ASC',
            ],
            'Invalid option default fallback, with invalid direction' => [
                $orderbymap,
                'thisdoesnotexist',
                'BOOP',
                ' ORDER BY c.fullname',
            ],
            'Invalid option without default, with valid direction' => [
                $orderbymapnodefault,
                'thisdoesnotexist',
                'ASC',
                '',
            ],
            'Invalid option without default, with invalid direction' => [
                $orderbymapnodefault,
                'thisdoesnotexist',
                'NOPE',
                '',
            ],
        ];
    }

/**
     * Tests the get_safe_orderby function.
     *
     * @dataProvider get_safe_orderby_provider
     * @param array $orderbymap The ORDER BY parameter mapping array.
     * @param string $orderbykey The string key being provided, to check against the map.
     * @param string $direction The optional direction to order by.
     * @param string $expected The expected string output of the method.
     */
    public function test_get_safe_orderby(array $orderbymap, string $orderbykey, string $direction, string $expected): void {
        $actual = get_safe_orderby($orderbymap, $orderbykey, $direction);
        $this->assertEquals($expected, $actual);
    }

/**
     * Data provider for test_get_safe_orderby_multiple().
     *
     * @return array
     */
    public function get_safe_orderby_multiple_provider(): array {
        $orderbymap = [
            'courseid' => 'c.id',
            'firstname' => 'u.firstname',
            'default' => 'c.startdate',
        ];
        $orderbymapnodefault = [
            'courseid' => 'c.id',
            'firstname' => 'u.firstname',
        ];

return [
            'Valid options, no directions specified' => [
                $orderbymap,
                ['courseid', 'firstname'],
                [],
                ' ORDER BY c.id, u.firstname',
            ],
            'Valid options, some direction specified' => [
                $orderbymap,
                ['courseid', 'firstname'],
                ['DESC'],
                ' ORDER BY c.id DESC, u.firstname',
            ],
            'Valid options, all directions specified' => [
                $orderbymap,
                ['courseid', 'firstname'],
                ['ASC', 'desc'],
                ' ORDER BY c.id ASC, u.firstname DESC',
            ],
            'Valid options, valid and invalid directions specified' => [
                $orderbymap,
                ['courseid', 'firstname'],
                ['BOOP', 'DESC'],
                ' ORDER BY c.id, u.firstname DESC',
            ],
            'Valid options, all invalid directions specified' => [
                $orderbymap,
                ['courseid', 'firstname'],
                ['BOOP', 'SNOOT'],
                ' ORDER BY c.id, u.firstname',
            ],
            'Valid and invalid option default fallback, with valid directions' => [
                $orderbymap,
                ['thisdoesnotexist', 'courseid'],
                ['asc', 'DESC'],
                ' ORDER BY c.startdate ASC, c.id DESC',
            ],
            'Valid and invalid option default fallback, with invalid direction' => [
                $orderbymap,
                ['courseid', 'thisdoesnotexist'],
                ['BOOP', 'SNOOT'],
                ' ORDER BY c.id, c.startdate',
            ],
            'Valid and invalid option without default, with valid direction' => [
                $orderbymapnodefault,
                ['thisdoesnotexist', 'courseid'],
                ['ASC', 'DESC'],
                ' ORDER BY c.id DESC',
            ],
            'Valid and invalid option without default, with invalid direction' => [
                $orderbymapnodefault,
                ['thisdoesnotexist', 'courseid'],
                ['BOOP', 'SNOOT'],
                ' ORDER BY c.id',
            ],
            'Invalid option only without default, with valid direction' => [
                $orderbymapnodefault,
                ['thisdoesnotexist'],
                ['ASC'],
                '',
            ],
            'Invalid option only without default, with invalid direction' => [
                $orderbymapnodefault,
                ['thisdoesnotexist'],
                ['BOOP'],
                '',
            ],
            'Single valid option, direction specified' => [
                $orderbymap,
                ['firstname'],
                ['ASC'],
                ' ORDER BY u.firstname ASC',
            ],
            'Single valid option, direction not specified' => [
                $orderbymap,
                ['firstname'],
                [],
                ' ORDER BY u.firstname',
            ],
        ];
    }

/**
     * Tests the get_safe_orderby_multiple function.
     *
     * @dataProvider get_safe_orderby_multiple_provider
     * @param array $orderbymap The ORDER BY parameter mapping array.
     * @param array $orderbykeys The array of string keys being provided, to check against the map.
     * @param array $directions The optional directions to order by.
     * @param string $expected The expected string output of the method.
     */
    public function test_get_safe_orderby_multiple(array $orderbymap, array $orderbykeys, array $directions,
            string $expected): void {
        $actual = get_safe_orderby_multiple($orderbymap, $orderbykeys, $directions);
        $this->assertEquals($expected, $actual);
    }
}

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