def test_start_hits_task_already_exists_error_error(self, queue_mock):
"""Ensure the task returns if a task already exists error is hit."""
from google.appengine.api.taskqueue import TaskAlreadyExistsError
from furious. async import Async
queue_mock.return_value.add.side_effect = TaskAlreadyExistsError()
async_job = Async("something", queue='my_queue')
async_job.start()
queue_mock.assert_called_with(name='my_queue')
self.assertEqual(1, queue_mock.return_value.add.call_count)
def queue_add(tasks, transactional=False):
if len(tasks) != 2:
raise TaskAlreadyExistsError()