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.
namespace core;
/**
* Unit tests for our locking implementations.
*
* @package core
* @category test
* @copyright 2013 Damyon Wiese
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
class lock_test extends \advanced_testcase {
/**
* Some lock types will store data in the database.
*/
protected function setUp(): void {
$this->resetAfterTest(true);
}
/**
* Run a suite of tests on a lock factory class.
*
* @param class $lockfactoryclass - A lock factory class to test
*/
protected function run_on_lock_factory($lockfactoryclass) {
$modassignfactory = new $lockfactoryclass('mod_assign');
$tooltaskfactory = new $lockfactoryclass('tool_task');
// Test for lock clashes between lock stores.
$assignlock = $modassignfactory->get_lock('abc', 0);
$this->assertNotEmpty($assignlock, 'Get a lock "abc" from store "mod_assign"');
$tasklock = $tooltaskfactory->get_lock('abc', 0);
$this->assertNotEmpty($tasklock, 'Get a lock "abc" from store "tool_task"');
$assignlock->release();
$tasklock->release();
$lockfactory = new $lockfactoryclass('default');
if ($lockfactory->is_available()) {
// This should work.
$lock1 = $lockfactory->get_lock('abc', 2);
$this->assertNotEmpty($lock1, 'Get a lock');
if ($lockfactory->supports_timeout()) {
// Attempt to obtain a lock within a 2 sec timeout.
$durationlock2 = -microtime(true);
$lock2 = $lockfactory->get_lock('abc', 2);
$durationlock2 += microtime(true);
if (!$lock2) { // If the lock was not obtained.
$this->assertFalse($lock2, 'Cannot get a stacked lock');
// This should timeout after 2 seconds.
$this->assertTrue($durationlock2 < 2.5, 'Lock should timeout after no more than 2 seconds');
} else {
$this->assertNotEmpty($lock2, 'Get a stacked lock');
$this->assertTrue($lock2->release(), 'Release a stacked lock');
}
// Attempt to obtain a lock within a 0 sec timeout.
$durationlock2 = -microtime(true);
$lock2 = $lockfactory->get_lock('abc', 0);
$durationlock2 += microtime(true);
if (!$lock2) { // If the lock was not obtained.
// This should timeout almost instantly.
$this->assertTrue($durationlock2 < 0.100, 'Lock should timeout almost instantly < 100ms');
} else {
// This stacked lock should be gained almost instantly.
$this->assertTrue($durationlock2 < 0.100, 'Lock should be gained almost instantly');
$lock2->release();
// We should also assert that locks fail instantly if locked
// from another process but this is hard to unit test.
}
}
// Release the lock.
$this->assertTrue($lock1->release(), 'Release a lock');
// Get it again.
$lock3 = $lockfactory->get_lock('abc', 2);
$this->assertNotEmpty($lock3, 'Get a lock again');
// Release the lock again.
$this->assertTrue($lock3->release(), 'Release a lock again');
// Release the lock again (shouldn't hurt).
$this->assertFalse($lock3->release(), 'Release a lock that is not held');
if (!$lockfactory->supports_auto_release()) {
// Test that a lock can be claimed after the timeout period.
$lock4 = $lockfactory->get_lock('abc', 2, 2);
$this->assertNotEmpty($lock4, 'Get a lock');
sleep(3);
$lock5 = $lockfactory->get_lock('abc', 2, 2);
$this->assertNotEmpty($lock5, 'Get another lock after a timeout');
$this->assertTrue($lock5->release(), 'Release the lock');
$this->assertTrue($lock4->release(), 'Release the lock');
}
}
}
/**
* Tests the testable lock factories classes.
* @return void
*/
public function test_locks() {
// Run the suite on the current configured default (may be non-core).
$this->run_on_lock_factory(\core\lock\lock_config::get_lock_factory_class());
// Manually create the core no-configuration factories.
$this->run_on_lock_factory(\core\lock\db_record_lock_factory::class);
$this->run_on_lock_factory(\core\lock\file_lock_factory::class);
}
}