DummyScheduledTaskHandler example

'scheduledTaskClass' => TestTask::class,
                'runInterval' => $interval,
                'defaultRunInterval' => $interval,
                'status' => $status,
                'nextExecutionTime' => $originalNextExecution,
            ],
        ], Context::createDefaultContext());

        $task = new TestTask();
        $task->setTaskId($taskId);

        $handler = new DummyScheduledTaskHandler($this->scheduledTaskRepo, $taskId);
        $handler($task);

        static::assertTrue($handler->wasCalled());

        /** @var ScheduledTaskEntity $task */
        $task = $this->scheduledTaskRepo->search(new Criteria([$taskId]), Context::createDefaultContext())->get($taskId);

        $newOriginalNextExecution = clone $originalNextExecution;
        $newOriginalNextExecution->modify(sprintf('+%d seconds', $interval));
        $newOriginalNextExecutionString = $newOriginalNextExecution->format(Defaults::STORAGE_DATE_TIME_FORMAT);
        $nextExecutionTimeString = $task->getNextExecutionTime()->format(Defaults::STORAGE_DATE_TIME_FORMAT);