protected function TestDatabase::getTestLock in Drupal 9

Same name and namespace in other branches

1. 8 core/lib/Drupal/Core/Test/TestDatabase.php \Drupal\Core\Test\TestDatabase::getTestLock()

Generates a unique lock ID for the test method.

Parameters

bool $create_lock: (optional) Whether or not to create a lock file. Defaults to FALSE.

Return value

int The unique lock ID for the test method.

1 call to TestDatabase::getTestLock()

TestDatabase::__construct in core/lib/Drupal/Core/Test/TestDatabase.php

TestDatabase constructor.

1 method overrides TestDatabase::getTestLock()

TestTestDatabase::getTestLock in core/tests/Drupal/Tests/Core/Test/TestDatabaseTest.php

Generates a unique lock ID for the test method.

File

core/lib/Drupal/Core/Test/TestDatabase.php, line 120

Class

TestDatabase

Provides helper methods for interacting with the fixture database.

Namespace

Drupal\Core\Test

Code

protected function getTestLock($create_lock = FALSE) {

  // There is a risk that the generated random number is a duplicate. This
  // would cause different tests to try to use the same database prefix.
  // Therefore, if running with a concurrency of greater than 1, we need to
  // create a lock.
  if (getenv('RUN_TESTS_CONCURRENCY') > 1) {
    $create_lock = TRUE;
  }
  do {
    $lock_id = mt_rand(10000000, 99999999);
    if ($create_lock && @symlink(__FILE__, $this
      ->getLockFile($lock_id)) === FALSE) {

      // If we can't create a symlink, the lock ID is in use. Generate another
      // one. Symlinks are used because they are atomic and reliable.
      $lock_id = NULL;
    }
  } while ($lock_id === NULL);
  return $lock_id;
}