function DatabaseStorageTest::testConcurrent

Tests asynchronous table creation.

File

core/tests/Drupal/KernelTests/Core/KeyValueStore/DatabaseStorageTest.php, line 40

Class

DatabaseStorageTest

Tests the key-value database storage.

Namespace

Code

public function testConcurrent() : void {
  $this->markTestSkipped("Skipped due to frequent random test failures. See https://www.drupal.org/project/drupal/issues/3398063");
  if (!function_exists('pcntl_fork')) {
    $this->markTestSkipped('Requires the pcntl_fork() function');
  }
  $functions = [];
  for ($i = 1; $i <= 10; $i++) {
    $functions[] = 'set';
    $functions[] = 'getAll';
  }
  $default_connection = Database::getConnectionInfo();
  Database::removeConnection('default');
  $time_to_start = microtime(TRUE) + 0.1;
  // This loop creates a new fork to set or get key values keys.
  foreach ($functions as $i => $function) {
    $pid = pcntl_fork();
    if ($pid == -1) {
      $this->fail("Error forking");
    }
    elseif ($pid == 0) {
      Database::addConnectionInfo('default' . $i, 'default', $default_connection['default']);
      Database::setActiveConnection('default' . $i);
      // Create a new factory using the new connection to avoid problems with
      // forks closing the database connections.
      $factory = new KeyValueDatabaseFactory($this->container
        ->get('serialization.phpserialize'), Database::getConnection());
      $store = $factory->get('test');
      // Sleep so that all the forks start at the same time.
      usleep((int) (($time_to_start - microtime(TRUE)) * 1000000));
      if ($function === 'getAll') {
        $this->assertIsArray($store->getAll());
      }
      else {
        $this->assertNull($store->set('foo' . $i, 'bar'));
      }
      exit;
    }
  }
  // This while loop holds the parent process until all the child threads
  // are complete - at which point the script continues to execute.
  while (pcntl_waitpid(0, $status) != -1) {
  }
  Database::addConnectionInfo('default', 'default', $default_connection['default']);
  $factory = new KeyValueDatabaseFactory($this->container
    ->get('serialization.phpserialize'), Database::getConnection());
  $store = $factory->get('test');
  $this->assertCount(10, $store->getAll());
}