def test_prepare_job_execution(redis):
"""Prepare job execution does the necessary bookkeeping."""
queue = Queue(connection=redis)
job = yield from queue.enqueue(say_hello)
worker = Worker([queue])
yield from worker.prepare_job_execution(job)
# Updates working queue
registry = StartedJobRegistry(connection=redis)
assert (yield from registry.get_job_ids()) == [job.id]
# Updates worker statuses
assert worker.get_state() == 'busy'
assert (yield from worker.get_current_job_id()) == job.id
