Preparations

• in IDE:
  1. go to Languages & Frameworks → PHP → Debug section of PhpStorm settings dialog
  2. set Max simultaneous connections setting to 3
  3. save changes
• in Admin Console:
  1. go to Configuration → Website → Advanced section
  2. enable Use Cron to run Scheduled Tasks setting
  3. save changes
  4. go to Configuration → Website → Scheduled Tasks section
  5. disable all scheduled tasks
  6. pick several tasks, that are executed each minute (update Run Schedule of any other task to make it usable in the test)
  7. enable picked tasks (Cancel them if they're marked as running currently)
• in IDE:
  1. replace body of above chosen scheduled tasks with `echo #' . getmypid() . ' - ' . $event . PHP_EOL;
  2. place breakpoint on foreach ($events_source as $short_name => $event_data) { line in \kScheduledTaskManager::runAll method
• in Terminal (start 2 windows in parallel):
  1. enable debugging from CLI
  2. run php tools/cron.php in folder of the project

Test Plan

Goal is to test, that even if both tools/cron.php started with same available scheduled task list they won't execute scheduled tasks, that were processed from parallel process.