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/>.

namespace core\task;

/**

 * Test class for adhoc tasks.

 *

 * @package core

 * @category test

 * @copyright 2013 Damyon Wiese

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

 * @covers \core\task\manager

 */

final class adhoc_task_test extends \advanced_testcase {

    public static function setUpBeforeClass(): void {

        parent::setUpBeforeClass();

        require_once(__DIR__ . '/../fixtures/task_fixtures.php');

    }

    /**

     * Test getting name of task that implements it's own get_name method

     *

     * @covers \core\task\adhoc_task

     */

    public function test_get_name(): void {

        $task = new \core\task\adhoc_test_task();

        $this->assertEquals('Test adhoc class', $task->get_name());

    }

    /**

     * Test getting name of task that uses the default implementation of get_name

     *

     * @covers \core\task\adhoc_task

     */

    public function test_get_name_default(): void {

        $task = new \mod_fake\task\adhoc_component_task();

        $this->assertEquals('Adhoc component task', $task->get_name());

    }

    /**

     * Test basic adhoc task execution.

     */

    public function test_get_next_adhoc_task_now(): void {

        $this->resetAfterTest(true);

        // Create an adhoc task.

        $task = new adhoc_test_task();

        // Queue it.

        manager::queue_adhoc_task($task);

        $now = time();

        // Get it from the scheduler.

        $task = manager::get_next_adhoc_task($now);

        $this->assertInstanceOf('\\core\\task\\adhoc_test_task', $task);

        $task->execute();

        manager::adhoc_task_complete($task);

    }

    /**

     * Test basic adhoc task execution.

     */

    public function test_get_next_adhoc_task_class(): void {

        $this->resetAfterTest(true);

        // Create an adhoc task.

        $task = new \core\task\adhoc_test_task();

        // Queue it.

        manager::queue_adhoc_task($task);

        $now = time();

        $classname = get_class($task);

        // The task will not be returned.

        $this->assertNull(manager::get_next_adhoc_task($now, true, "{$classname}notexists"));

        // Get it from the scheduler.

        $task = manager::get_next_adhoc_task($now, true, $classname);

        $this->assertInstanceOf('\\core\\task\\adhoc_test_task', $task);

        $task->execute();

        manager::adhoc_task_complete($task);

    }

    /**

     * Test adhoc task failure retry backoff.

     */

    public function test_get_next_adhoc_task_fail_retry(): void {

        $this->resetAfterTest(true);

        // Create an adhoc task.

        $task = new adhoc_test_task();

        manager::queue_adhoc_task($task);

        $now = time();

        // Get it from the scheduler, execute it, and mark it as failed.

        $task = manager::get_next_adhoc_task($now);

        $taskid = $task->get_id();

        $task->execute();

        manager::adhoc_task_failed($task);

        // The task will not be returned immediately.

        $this->assertNull(manager::get_next_adhoc_task($now));

        // Should get the adhoc task (retry after delay). Fail it again.

        $task = manager::get_next_adhoc_task($now + 120);

        $this->assertInstanceOf('\\core\\task\\adhoc_test_task', $task);

        $this->assertEquals($taskid, $task->get_id());

        $task->execute();

        manager::adhoc_task_failed($task);

        // Should get the adhoc task immediately.

        $task = manager::get_adhoc_task($taskid);

        $this->assertInstanceOf('\\core\\task\\adhoc_test_task', $task);

        $this->assertEquals($taskid, $task->get_id());

        $task->execute();

        manager::adhoc_task_complete($task);

        // Should not get any task.

        $this->assertNull(manager::get_next_adhoc_task($now));

    }

    /**

     * Test that failed tasks eventually hit the maximum delay.

     *

     * @covers \core\task\adhoc_task

     */

    public function test_get_next_adhoc_task_maximum_fail_delay(): void {

        $this->resetAfterTest(true);

        $now = time();

        // Create an adhoc task.

        $task = new adhoc_test_task();

        $attemptsavailable = $task->get_attempts_available();

        manager::queue_adhoc_task($task);

        // Exhaust all attempts available.

        for ($x = 0; $x < $attemptsavailable; $x++) {

            $delay = $task->get_fail_delay() * 2;

            $task = manager::get_next_adhoc_task($now + $delay);

            $task->execute();

            manager::adhoc_task_failed($task);

        }

        // Check that the fail delay is now set to 24 hours (the maximum amount of times).

        $this->assertEquals(DAYSECS, $task->get_fail_delay());

    }

    /**

     * Test adhoc task failure retry backoff.

     */

    public function test_adhoc_task_with_retry_flag(): void {

        global $DB;

        $this->resetAfterTest();

        $now = time();

        // Create a normal adhoc task.

        $task = new adhoc_test_task();

        $taskid1 = manager::queue_adhoc_task(task: $task);

        // This is a normal task, so it should have limited attempts.

        $attemptsavailable = $DB->get_field(

            table: 'task_adhoc',

            return: 'attemptsavailable',

            conditions: ['id' => $taskid1]

        );

        $this->assertEquals(expected: 12, actual: $attemptsavailable);

        // Get the task from the scheduler, execute it, and mark it as failed.

        $task = manager::get_next_adhoc_task(timestart: $now);

        $taskid1 = $task->get_id();

        $task->execute();

        manager::adhoc_task_failed(task: $task);

        // Now that the task has failed, there should be one less attempt available.

        $attemptsavailable = $DB->get_field(

            table: 'task_adhoc',

            return: 'attemptsavailable',

            conditions: ['id' => $taskid1]

        );

        $this->assertEquals(expected: 12 - 1, actual: $attemptsavailable);

        // Create a no-retry adhoc task.

        $now = time();

        $task = new no_retry_adhoc_task();

        $taskid2 = manager::queue_adhoc_task(task: $task);

        // This is no-retry task, so it should have only 1 attempt available.

        $attemptsavailable = $DB->get_field(

            table: 'task_adhoc',

            return: 'attemptsavailable',

            conditions: ['id' => $taskid2]

        );

        $this->assertEquals(

            expected: 1,

            actual: $attemptsavailable,

        );

        // Get the task from the scheduler, execute it, and mark it as failed.

        $task = manager::get_next_adhoc_task(timestart: $now);

        $taskid2 = $task->get_id();

        $task->execute();

        manager::adhoc_task_failed(task: $task);

        // This is no-retry task, the remaining available attempts should be reduced to 0.

        $attemptsavailable = $DB->get_field(

            table: 'task_adhoc',

            return: 'attemptsavailable',

            conditions: ['id' => $taskid2]

        );

        $this->assertEquals(

            expected: 0,

            actual: $attemptsavailable,

        );

        // There will be two records in the task_adhoc table, one for each task.

        $this->assertEquals(

            expected: 2,

            actual: $DB->count_records(table: 'task_adhoc')

        );

        // But get_next_adhoc_task() should return only the allowed re-try task.

        // The no-retry task should not be returned because it has no remaining attempts.

        do {

            $task = manager::get_next_adhoc_task(timestart: $now + 86400);

            if ($task) {

                manager::adhoc_task_failed(task: $task);

                $this->assertEquals(

                    expected: $taskid1,

                    actual: $task->get_id(),

                );

            }

        } while ($task);

        // Mark the normal task as complete.

        $task = manager::get_adhoc_task(taskid: $taskid1);

        manager::adhoc_task_complete($task);

        // There will be one record in the task_adhoc table.

        $this->assertEquals(

            expected: 1,

            actual: $DB->count_records(table: 'task_adhoc')

        );

        // But get_next_adhoc_task() should return nothing.

        $this->assertNull(manager::get_next_adhoc_task(timestart: $now + 86400));

    }

    /**

     * Test adhoc task failure cleanup.

     */

    public function test_adhoc_task_clean_up(): void {

        global $DB, $CFG;

        $this->resetAfterTest();

        // Create two no-retry adhoc tasks.

        $task1 = new no_retry_adhoc_task();

        $taskid1 = manager::queue_adhoc_task(task: $task1);

        $task2 = new no_retry_adhoc_task();

        $taskid2 = manager::queue_adhoc_task(task: $task2);

        // Get the tasks and mark it as failed.

        $task = manager::get_adhoc_task($taskid1);

        manager::adhoc_task_failed(task: $task);

        $task = manager::get_adhoc_task($taskid2);

        manager::adhoc_task_failed(task: $task);

        // These are no-retry tasks, the remaining available attempts should be reduced to 0.

        $this->assertEquals(

            expected: 0,

            actual: $DB->get_field(

                table: 'task_adhoc',

                return: 'attemptsavailable',

                conditions: ['id' => $taskid1],

            ),

        );

        $this->assertEquals(

            expected: 0,

            actual: $DB->get_field(

                table: 'task_adhoc',

                return: 'attemptsavailable',

                conditions: ['id' => $taskid2],

            ),

        );

        // There will be two records in the task_adhoc table.

        $this->assertEquals(

            expected: 2,

            actual: $DB->count_records(table: 'task_adhoc'),

        );

        // Clean up failed adhoc tasks. This will clean nothing because the tasks are not old enough.

        manager::clean_failed_adhoc_tasks();

        // There will be two records in the task_adhoc table.

        $this->assertEquals(

            expected: 2,

            actual: $DB->count_records(table: 'task_adhoc'),

        );

        // Update the time of the task2 to be older more than 2 days.

        $DB->set_field(

            table: 'task_adhoc',

            newfield: 'firststartingtime',

            newvalue: time() - (DAYSECS * 2) - 10, // Plus 10 seconds to make sure it is older than 2 days.

            conditions: ['id' => $taskid2],

        );

        // Clean up failed adhoc tasks. This will clean nothing because the tasks are not old enough.

        manager::clean_failed_adhoc_tasks();

        // There will be two records in the task_adhoc table.

        $this->assertEquals(

            expected: 2,

            actual: $DB->count_records(table: 'task_adhoc'),

        );

        // Update the time of the task1 to be older than the cleanup time.

        $DB->set_field(

            table: 'task_adhoc',

            newfield: 'firststartingtime',

            // Plus 10 seconds to make sure it is older than the retention time.

            newvalue: time() - $CFG->task_adhoc_failed_retention - 10,

            conditions: ['id' => $taskid1],

        );

        // Clean up failed adhoc tasks. task1 should be cleaned now.

        manager::clean_failed_adhoc_tasks();

        // There will be one record in the task_adhoc table.

        $this->assertEquals(

            expected: 1,

            actual: $DB->count_records(table: 'task_adhoc'),

        );

        // Update the duration of the Failed ad hoc task retention period to one day.

        $CFG->task_adhoc_failed_retention = DAYSECS;

        // Clean up failed adhoc tasks. task2 should be cleaned now.

        manager::clean_failed_adhoc_tasks();

        // The task_adhoc table should be empty now.

        $this->assertEquals(

            expected: 0,

            actual: $DB->count_records(table: 'task_adhoc'),

        );

    }

    /**

     * Test adhoc task failure will retain the time information.

     */

    public function test_adhoc_task_failed_will_retain_time_info(): void {

        global $DB;

        $this->resetAfterTest();

        $now = time();

        // Create an adhoc task.

        $task = new adhoc_test_task();

        // Queue it.

        $taskid = manager::queue_adhoc_task(task: $task);

        // Update the timecreated of the task to be older.

        $DB->set_field(

            table: 'task_adhoc',

            newfield: 'timecreated',

            newvalue: time() - DAYSECS,

            conditions: ['id' => $taskid],

        );

        // Get the timecreated value before marking the task as failed.

        $timecreatedbefore = $DB->get_field(

            table: 'task_adhoc',

            return: 'timecreated',

            conditions: ['id' => $taskid],

        );

        // Get the task from the scheduler.

        $task = manager::get_next_adhoc_task(timestart: $now);

        // Execute the task.

        $task->execute();

        // Mark the task as failed.

        manager::adhoc_task_failed(task: $task);

        // Get the timecreated value after marking the task as failed.

        $timecreatedafter = $DB->get_field(

            table: 'task_adhoc',

            return: 'timecreated',

            conditions: ['id' => $taskid],

        );

        // The timecreated values should be the same.

        $this->assertEquals($timecreatedbefore, $timecreatedafter);

    }

    /**

     * Test future adhoc task execution.

     */

    public function test_get_next_adhoc_task_future(): void {

        $this->resetAfterTest(true);

        $now = time();

        // Create an adhoc task in future.

        $task = new adhoc_test_task();

        $task->set_next_run_time($now + 1000);

        manager::queue_adhoc_task($task);

        // Fetching the next task should not return anything.

        $this->assertNull(manager::get_next_adhoc_task($now));

        // Fetching in the future should return the task.

        $task = manager::get_next_adhoc_task($now + 1020);

        $this->assertInstanceOf('\\core\\task\\adhoc_test_task', $task);

        $task->execute();

        manager::adhoc_task_complete($task);

    }

    /**

     * Test queueing an adhoc task belonging to a component, where we set the task component accordingly

     */

    public function test_queue_adhoc_task_for_component(): void {

        $this->resetAfterTest();

        $task = new \mod_forum\task\send_user_digests();

        $task->set_component('mod_test');

        manager::queue_adhoc_task($task);

        $this->assertDebuggingNotCalled();

    }

    /**

     * Test queueing an adhoc task belonging to a component, where we do not set the task component

     */

    public function test_queue_task_for_component_without_set_component(): void {

        $this->resetAfterTest();

        $task = new \mod_forum\task\send_user_digests();

        manager::queue_adhoc_task($task);

        $this->assertDebuggingNotCalled();

        // Assert the missing component was set.

        $this->assertEquals('mod_forum', $task->get_component());

    }

    /**

     * Test queueing an adhoc task belonging to an invalid component, where we do not set the task component

     */

    public function test_queue_task_for_invalid_component_without_set_component(): void {

        $this->resetAfterTest();

        $task = new \mod_fake\task\adhoc_component_task();

        manager::queue_adhoc_task($task);

        $this->assertDebuggingCalled('Component not set and the class namespace does not match a valid component (mod_fake).');

    }

    /**

     * Test empty set of adhoc tasks

     */

    public function test_get_adhoc_tasks_empty_set(): void {

        $this->resetAfterTest(true);

        $this->assertEquals([], manager::get_adhoc_tasks('\\core\\task\\adhoc_test_task'));

    }

    /**

     * Test correct set of adhoc tasks is returned for class.

     */

    public function test_get_adhoc_tasks_result_set(): void {

        $this->resetAfterTest(true);

        for ($i = 0; $i < 3; $i++) {

            $task = new adhoc_test_task();

            manager::queue_adhoc_task($task);

        }

        for ($i = 0; $i < 3; $i++) {

            $task = new adhoc_test2_task();

            manager::queue_adhoc_task($task);

        }

        $adhoctests = manager::get_adhoc_tasks('\\core\\task\\adhoc_test_task');

        $adhoctest2s = manager::get_adhoc_tasks('\\core\\task\\adhoc_test2_task');

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

        $this->assertCount(3, $adhoctest2s);

        foreach ($adhoctests as $task) {

            $this->assertInstanceOf('\\core\\task\\adhoc_test_task', $task);

        }

        foreach ($adhoctest2s as $task) {

            $this->assertInstanceOf('\\core\\task\\adhoc_test2_task', $task);

        }

    }

    /**

     * Ensure that the reschedule_or_queue_adhoc_task function will schedule a new task if no tasks exist.

     */

    public function test_reschedule_or_queue_adhoc_task_no_existing(): void {

        $this->resetAfterTest(true);

        // Schedule adhoc task.

        $task = new adhoc_test_task();

        $task->set_custom_data(['courseid' => 10]);

        manager::reschedule_or_queue_adhoc_task($task);

        $this->assertEquals(1, count(manager::get_adhoc_tasks('core\task\adhoc_test_task')));

    }

    /**

     * Ensure that the reschedule_or_queue_adhoc_task function will schedule a new task if a task for the same user does

     * not exist.

     */

    public function test_reschedule_or_queue_adhoc_task_different_user(): void {

        $this->resetAfterTest(true);

        $user = \core_user::get_user_by_username('admin');

        // Schedule adhoc task.

        $task = new adhoc_test_task();

        $task->set_custom_data(['courseid' => 10]);

        manager::reschedule_or_queue_adhoc_task($task);

        // Schedule adhoc task for a different user.

        $task = new adhoc_test_task();

        $task->set_custom_data(['courseid' => 10]);

        $task->set_userid($user->id);

        manager::reschedule_or_queue_adhoc_task($task);

        $this->assertEquals(2, count(manager::get_adhoc_tasks('core\task\adhoc_test_task')));

    }

    /**

     * Ensure that the reschedule_or_queue_adhoc_task function will schedule a new task if a task with different custom

     * data exists.

     */

    public function test_reschedule_or_queue_adhoc_task_different_data(): void {

        $this->resetAfterTest(true);

        // Schedule adhoc task.

        $task = new adhoc_test_task();

        $task->set_custom_data(['courseid' => 10]);

        manager::reschedule_or_queue_adhoc_task($task);

        // Schedule adhoc task for a different user.

        $task = new adhoc_test_task();

        $task->set_custom_data(['courseid' => 11]);

        manager::reschedule_or_queue_adhoc_task($task);

        $this->assertEquals(2, count(manager::get_adhoc_tasks('core\task\adhoc_test_task')));

    }

    /**

     * Ensure that the reschedule_or_queue_adhoc_task function will not make any change for matching data if no time was

     * specified.

     */

    public function test_reschedule_or_queue_adhoc_task_match_no_change(): void {

        $this->resetAfterTest(true);

        // Schedule adhoc task.

        $task = new adhoc_test_task();

        $task->set_custom_data(['courseid' => 10]);

        $task->set_next_run_time(time() + DAYSECS);

        manager::reschedule_or_queue_adhoc_task($task);

        $before = manager::get_adhoc_tasks('core\task\adhoc_test_task');

        // Schedule the task again but do not specify a time.

        $task = new adhoc_test_task();

        $task->set_custom_data(['courseid' => 10]);

        manager::reschedule_or_queue_adhoc_task($task);

        $this->assertEquals(1, count(manager::get_adhoc_tasks('core\task\adhoc_test_task')));

        $this->assertEquals($before, manager::get_adhoc_tasks('core\task\adhoc_test_task'));

    }

    /**

     * Ensure that the reschedule_or_queue_adhoc_task function will update the run time if there are planned changes.

     */

    public function test_reschedule_or_queue_adhoc_task_match_update_runtime(): void {

        $this->resetAfterTest(true);

        $initialruntime = time() + DAYSECS;

        $newruntime = time() + WEEKSECS;

        // Schedule adhoc task.

        $task = new adhoc_test_task();

        $task->set_custom_data(['courseid' => 10]);

        $task->set_next_run_time($initialruntime);

        manager::reschedule_or_queue_adhoc_task($task);

        $before = manager::get_adhoc_tasks('core\task\adhoc_test_task');

        // Schedule the task again.

        $task = new adhoc_test_task();

        $task->set_custom_data(['courseid' => 10]);

        $task->set_next_run_time($newruntime);

        manager::reschedule_or_queue_adhoc_task($task);

        $tasks = manager::get_adhoc_tasks('core\task\adhoc_test_task');

        $this->assertEquals(1, count($tasks));

        $this->assertNotEquals($before, $tasks);

        $firsttask = reset($tasks);

        $this->assertEquals($newruntime, $firsttask->get_next_run_time());

    }

    /**

     * Test queue_adhoc_task "if not scheduled".

     */

    public function test_queue_adhoc_task_if_not_scheduled(): void {

        $this->resetAfterTest(true);

        $user = \core_user::get_user_by_username('admin');

        // Schedule adhoc task.

        $task = new adhoc_test_task();

        $task->set_custom_data(['courseid' => 10]);

        $this->assertNotEmpty(manager::queue_adhoc_task($task, true));

        $this->assertEquals(1, count(manager::get_adhoc_tasks('core\task\adhoc_test_task')));

        // Schedule adhoc task with a user.

        $task = new adhoc_test_task();

        $task->set_custom_data(['courseid' => 10]);

        $task->set_userid($user->id);

        $this->assertNotEmpty(manager::queue_adhoc_task($task, true));

        $this->assertEquals(2, count(manager::get_adhoc_tasks('core\task\adhoc_test_task')));

        // Schedule same adhoc task with different custom data.

        $task = new adhoc_test_task();

        $task->set_custom_data(['courseid' => 1]);

        $this->assertNotEmpty(manager::queue_adhoc_task($task, true));

        $this->assertEquals(3, count(manager::get_adhoc_tasks('core\task\adhoc_test_task')));

        // Schedule same adhoc task with same custom data.

        $task = new adhoc_test_task();

        $task->set_custom_data(['courseid' => 1]);

        $this->assertEmpty(manager::queue_adhoc_task($task, true));

        $this->assertEquals(3, count(manager::get_adhoc_tasks('core\task\adhoc_test_task')));

        // Schedule same adhoc task with same custom data and a user.

        $task = new adhoc_test_task();

        $task->set_custom_data(['courseid' => 1]);

        $task->set_userid($user->id);

        $this->assertNotEmpty(manager::queue_adhoc_task($task, true));

        $this->assertEquals(4, count(manager::get_adhoc_tasks('core\task\adhoc_test_task')));

        // Schedule same adhoc task without custom data.

        // Note: This task was created earlier.

        $task = new adhoc_test_task();

        $this->assertNotEmpty(manager::queue_adhoc_task($task, true));

        $this->assertEquals(5, count(manager::get_adhoc_tasks('core\task\adhoc_test_task')));

        // Schedule same adhoc task without custom data (again).

        $task5 = new adhoc_test_task();

        $this->assertEmpty(manager::queue_adhoc_task($task5, true));

        $this->assertEquals(5, count(manager::get_adhoc_tasks('core\task\adhoc_test_task')));

        // Schedule same adhoc task without custom data but with a userid.

        $task6 = new adhoc_test_task();

        $user = \core_user::get_user_by_username('admin');

        $task6->set_userid($user->id);

        $this->assertNotEmpty(manager::queue_adhoc_task($task6, true));

        $this->assertEquals(6, count(manager::get_adhoc_tasks('core\task\adhoc_test_task')));

        // Schedule same adhoc task again without custom data but with a userid.

        $task6 = new adhoc_test_task();

        $user = \core_user::get_user_by_username('admin');

        $task6->set_userid($user->id);

        $this->assertEmpty(manager::queue_adhoc_task($task6, true));

        $this->assertEquals(6, count(manager::get_adhoc_tasks('core\task\adhoc_test_task')));

    }

    /**

     * Test that when no userid is specified, it returns empty from the DB

     * too.

     * @covers \core\task\adhoc_task

     */

    public function test_adhoc_task_user_empty(): void {

        $this->resetAfterTest(true);

        // Create an adhoc task in future.

        $task = new adhoc_test_task();

        manager::queue_adhoc_task($task);

        // Get it back from the scheduler.

        $now = time();

        $task = manager::get_next_adhoc_task($now);

        manager::adhoc_task_complete($task);

        $this->assertEmpty($task->get_userid());

    }

    /**

     * Test that when a userid is specified, that userid is subsequently

     * returned.

     *

     * @covers \core\task\adhoc_task

     */

    public function test_adhoc_task_user_set(): void {

        $this->resetAfterTest(true);

        // Create an adhoc task in future.

        $task = new adhoc_test_task();

        $user = \core_user::get_user_by_username('admin');

        $task->set_userid($user->id);

        manager::queue_adhoc_task($task);

        // Get it back from the scheduler.

        $now = time();

        $task = manager::get_next_adhoc_task($now);

        manager::adhoc_task_complete($task);

        $this->assertEquals($user->id, $task->get_userid());

    }

    /**

     * Test adhoc task with the first starting time.

     */

    public function test_adhoc_task_get_first_starting_time(): void {

        global $DB;

        $this->resetAfterTest(true);

        $now = time();

        // Create an adhoc task.

        $task = new adhoc_test_task();

        // Queue it.

        $taskid = manager::queue_adhoc_task(task: $task);

        // Get the firststartingtime value.

        $firststartingtime = $DB->get_field(

            table: 'task_adhoc',

            return: 'firststartingtime',

            conditions: ['id' => $taskid],

        );

        $this->assertNull($firststartingtime);

        // This will make sure that the task will be started after the $now value.

        sleep(3);

        // Get the task from the scheduler.

        $task = manager::get_next_adhoc_task(timestart: $now);

        // Mark the task as starting.

        manager::adhoc_task_starting($task);

        // Execute the task.

        $task->execute();

        // Mark the task as failed.

        manager::adhoc_task_failed(task: $task);

        // Get the firststartingtime value.

        $origintimestarted = $DB->get_field(

            table: 'task_adhoc',

            return: 'firststartingtime',

            conditions: ['id' => $taskid],

        );

        $this->assertNotNull($origintimestarted);

        $this->assertGreaterThan($now, $origintimestarted);

        // Get the task from the scheduler.

        $task = manager::get_next_adhoc_task(timestart: $now + 86400);

        // Mark the task as starting.

        manager::adhoc_task_starting($task);

        // Execute the task.

        $task->execute();

        // Mark the task as failed.

        manager::adhoc_task_failed(task: $task);

        // Get the firststartingtime value.

        $firststartingtime = $DB->get_field(

            table: 'task_adhoc',

            return: 'firststartingtime',

            conditions: ['id' => $taskid],

        );

        // The firststartingtime value should not be changed.

        $this->assertEquals($origintimestarted, $firststartingtime);

    }

    /**

     * Test get_concurrency_limit() method to return 0 by default.

     *

     * @covers \core\task\adhoc_task

     */

    public function test_get_concurrency_limit(): void {

        $this->resetAfterTest(true);

        $task = new adhoc_test_task();

        $concurrencylimit = $task->get_concurrency_limit();

        $this->assertEquals(0, $concurrencylimit);

    }

    /**

     * Test get_concurrency_limit() method to return a default value set in config.

     * @covers \core\task\adhoc_task

     */

    public function test_get_concurrency_limit_default(): void {

        $this->resetAfterTest(true);

        set_config('task_concurrency_limit_default', 10);

        $task = new adhoc_test_task();

        $concurrencylimit = $task->get_concurrency_limit();

        $this->assertEquals(10, $concurrencylimit);

    }

    /**

     * Test get_concurrency_limit() method to return a value for specific task class.

     * @covers \core\task\adhoc_task

     */

    public function test_get_concurrency_limit_for_task(): void {

        global $CFG;

        $this->resetAfterTest(true);

        set_config('task_concurrency_limit_default', 10);

        $CFG->task_concurrency_limit = ['core\task\adhoc_test_task' => 5];

        $task = new adhoc_test_task();

        $concurrencylimit = $task->get_concurrency_limit();

        $this->assertEquals(5, $concurrencylimit);

    }

    /**

     * Test adhoc task sorting.

     */

    public function test_get_next_adhoc_task_sorting(): void {

        $this->resetAfterTest(true);

        // Create adhoc tasks.

        $task1 = new adhoc_test_task();

        $task1->set_next_run_time(1510000000);

        $task1->set_custom_data_as_string('Task 1');

        manager::queue_adhoc_task($task1);

        $task2 = new adhoc_test_task();

        $task2->set_next_run_time(1520000000);

        $task2->set_custom_data_as_string('Task 2');

        manager::queue_adhoc_task($task2);

        $task3 = new adhoc_test_task();

        $task3->set_next_run_time(1520000000);

        $task3->set_custom_data_as_string('Task 3');

        manager::queue_adhoc_task($task3);

        // Shuffle tasks.

        $task1->set_next_run_time(1540000000);

        manager::reschedule_or_queue_adhoc_task($task1);

        $task3->set_next_run_time(1530000000);

        manager::reschedule_or_queue_adhoc_task($task3);

        $task2->set_next_run_time(1530000000);

        manager::reschedule_or_queue_adhoc_task($task2);

        // Confirm, that tasks are sorted by nextruntime and then by id (ascending).

        $task = manager::get_next_adhoc_task(time());

        $this->assertEquals('Task 2', $task->get_custom_data_as_string());

        manager::adhoc_task_complete($task);

        $task = manager::get_next_adhoc_task(time());

        $this->assertEquals('Task 3', $task->get_custom_data_as_string());

        manager::adhoc_task_complete($task);

        $task = manager::get_next_adhoc_task(time());

        $this->assertEquals('Task 1', $task->get_custom_data_as_string());

        manager::adhoc_task_complete($task);

    }

    /**

     * Test adhoc task run from CLI.

     */

    public function test_run_adhoc_from_cli(): void {

        $this->resetAfterTest(true);

        $taskid = 1;

        if (!manager::is_runnable()) {

            $this->markTestSkipped("Cannot run tasks");

        }

        ob_start();

        manager::run_adhoc_from_cli($taskid);

        $output = ob_get_contents();

        ob_end_clean();

        $this->assertMatchesRegularExpression(

            sprintf('!admin/cli/adhoc_task.php\W+--id=%d\W+--force!', $taskid),

            $output

        );

    }

    /**

     * Test adhoc class run from CLI.

     */

    public function test_run_all_adhoc_from_cli(): void {

        $this->resetAfterTest(true);

        $classname = 'fake';

        if (!manager::is_runnable()) {

            $this->markTestSkipped("Cannot run tasks");

        }

        ob_start();

        manager::run_all_adhoc_from_cli(false, $classname);

        $output = ob_get_contents();

        ob_end_clean();

        $this->assertMatchesRegularExpression(

            sprintf('!admin/cli/adhoc_task.php\W+--classname=%s\W+--force!', $classname),

            $output

        );

    }

    /**

     * Test send messages when adhoc task reaches the max fail delay time.

     *

     * @covers ::adhoc_task_failed

     * @covers ::send_failed_task_max_delay_message

     */

    public function test_adhoc_message_max_fail_delay(): void {

        $this->resetAfterTest();

        $this->setAdminUser();

        // Redirect messages.

        $messagesink = $this->redirectMessages();

        // Create an adhoc task.

        $task = new adhoc_test_task();

        manager::queue_adhoc_task($task);

        $now = time();

        // Get it from the scheduler, execute it, and mark it as failed.

        $task = manager::get_next_adhoc_task($now);

        $taskid = $task->get_id();

        $task->execute();

        // Catch the message. The task has not reach the max time delay yet.

        manager::adhoc_task_failed($task);

        $messages = $messagesink->get_messages();

        $this->assertCount(0, $messages);

        // Should get the adhoc task immediately.

        $task = manager::get_adhoc_task($taskid);

        $task->set_fail_delay(86400);

        $this->assertInstanceOf('\\core\\task\\adhoc_test_task', $task);

        $this->assertEquals($taskid, $task->get_id());

        $task->execute();

        // Catch the message.

        manager::adhoc_task_failed($task);

        $messages = $messagesink->get_messages();

        $this->assertCount(1, $messages);

        // Get the task and execute it second time.

        $task = manager::get_adhoc_task($taskid);

        // Set the fail delay to 12 hours.

        $task->set_fail_delay(43200);

        $task->execute();

        manager::adhoc_task_failed($task);

        // Catch the message.

        $messages = $messagesink->get_messages();

        $this->assertCount(2, $messages);

        // Get the task and execute it third time.

        $task = manager::get_adhoc_task($taskid);

        // Set the fail delay to 48 hours.

        $task->set_fail_delay(172800);

        $task->execute();

        manager::adhoc_task_failed($task);

        // Catch the message.

        $messages = $messagesink->get_messages();

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

        // Check first message information.

        $this->assertStringContainsString('Task failed: Test adhoc class', $messages[0]->subject);

        $this->assertEquals('failedtaskmaxdelay', $messages[0]->eventtype);

        $this->assertEquals('-10', $messages[0]->useridfrom);

        $this->assertEquals('2', $messages[0]->useridto);

        // Close sink.

        $messagesink->close();

    }

}