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from django.db import transaction
from django.tasks import TaskResultStatus, default_task_backend, task_backends
from django.tasks.backends.immediate import ImmediateBackend
from django.tasks.exceptions import InvalidTask
from django.test import SimpleTestCase, TransactionTestCase, override_settings
from django.utils import timezone
from . import tasks as test_tasks
@override_settings(
TASKS={
"default": {
"BACKEND": "django.tasks.backends.immediate.ImmediateBackend",
"QUEUES": [],
}
}
)
class ImmediateBackendTestCase(SimpleTestCase):
def test_using_correct_backend(self):
self.assertEqual(default_task_backend, task_backends["default"])
self.assertIsInstance(task_backends["default"], ImmediateBackend)
self.assertEqual(default_task_backend.alias, "default")
self.assertEqual(default_task_backend.options, {})
def test_enqueue_task(self):
for task in [test_tasks.noop_task, test_tasks.noop_task_async]:
with self.subTest(task):
result = task.enqueue(1, two=3)
self.assertEqual(result.status, TaskResultStatus.SUCCESSFUL)
self.assertIs(result.is_finished, True)
self.assertIsNotNone(result.started_at)
self.assertIsNotNone(result.last_attempted_at)
self.assertIsNotNone(result.finished_at)
self.assertGreaterEqual(result.started_at, result.enqueued_at)
self.assertGreaterEqual(result.finished_at, result.started_at)
self.assertIsNone(result.return_value)
self.assertEqual(result.task, task)
self.assertEqual(result.args, [1])
self.assertEqual(result.kwargs, {"two": 3})
self.assertEqual(result.attempts, 1)
async def test_enqueue_task_async(self):
for task in [test_tasks.noop_task, test_tasks.noop_task_async]:
with self.subTest(task):
result = await task.aenqueue()
self.assertEqual(result.status, TaskResultStatus.SUCCESSFUL)
self.assertIs(result.is_finished, True)
self.assertIsNotNone(result.started_at)
self.assertIsNotNone(result.last_attempted_at)
self.assertIsNotNone(result.finished_at)
self.assertGreaterEqual(result.started_at, result.enqueued_at)
self.assertGreaterEqual(result.finished_at, result.started_at)
self.assertIsNone(result.return_value)
self.assertEqual(result.task, task)
self.assertEqual(result.args, [])
self.assertEqual(result.kwargs, {})
self.assertEqual(result.attempts, 1)
def test_catches_exception(self):
test_data = [
(
test_tasks.failing_task_value_error, # Task function.
ValueError, # Expected exception.
"This Task failed due to ValueError", # Expected message.
),
(
test_tasks.failing_task_system_exit,
SystemExit,
"This Task failed due to SystemExit",
),
]
for task, exception, message in test_data:
with (
self.subTest(task),
self.assertLogs("django.tasks", level="ERROR") as captured_logs,
):
result = task.enqueue()
self.assertEqual(len(captured_logs.output), 1)
self.assertIn(message, captured_logs.output[0])
self.assertEqual(result.status, TaskResultStatus.FAILED)
with self.assertRaisesMessage(ValueError, "Task failed"):
result.return_value
self.assertIs(result.is_finished, True)
self.assertIsNotNone(result.started_at)
self.assertIsNotNone(result.last_attempted_at)
self.assertIsNotNone(result.finished_at)
self.assertGreaterEqual(result.started_at, result.enqueued_at)
self.assertGreaterEqual(result.finished_at, result.started_at)
self.assertEqual(result.errors[0].exception_class, exception)
traceback = result.errors[0].traceback
self.assertIs(
traceback
and traceback.endswith(f"{exception.__name__}: {message}\n"),
True,
traceback,
)
self.assertEqual(result.task, task)
self.assertEqual(result.args, [])
self.assertEqual(result.kwargs, {})
def test_throws_keyboard_interrupt(self):
with self.assertRaises(KeyboardInterrupt):
with self.assertNoLogs("django.tasks", level="ERROR"):
default_task_backend.enqueue(
test_tasks.failing_task_keyboard_interrupt, [], {}
)
def test_complex_exception(self):
with self.assertLogs("django.tasks", level="ERROR"):
result = test_tasks.complex_exception.enqueue()
self.assertEqual(result.status, TaskResultStatus.FAILED)
with self.assertRaisesMessage(ValueError, "Task failed"):
result.return_value
self.assertIsNotNone(result.started_at)
self.assertIsNotNone(result.last_attempted_at)
self.assertIsNotNone(result.finished_at)
self.assertGreaterEqual(result.started_at, result.enqueued_at)
self.assertGreaterEqual(result.finished_at, result.started_at)
self.assertIsNone(result._return_value)
self.assertEqual(result.errors[0].exception_class, ValueError)
self.assertIn(
'ValueError(ValueError("This task failed"))', result.errors[0].traceback
)
self.assertEqual(result.task, test_tasks.complex_exception)
self.assertEqual(result.args, [])
self.assertEqual(result.kwargs, {})
def test_complex_return_value(self):
with self.assertLogs("django.tasks", level="ERROR"):
result = test_tasks.complex_return_value.enqueue()
self.assertEqual(result.status, TaskResultStatus.FAILED)
self.assertIsNotNone(result.started_at)
self.assertIsNotNone(result.last_attempted_at)
self.assertIsNotNone(result.finished_at)
self.assertGreaterEqual(result.started_at, result.enqueued_at)
self.assertGreaterEqual(result.finished_at, result.started_at)
self.assertIsNone(result._return_value)
self.assertEqual(result.errors[0].exception_class, TypeError)
self.assertIn("Unsupported type", result.errors[0].traceback)
def test_result(self):
result = default_task_backend.enqueue(
test_tasks.calculate_meaning_of_life, [], {}
)
self.assertEqual(result.status, TaskResultStatus.SUCCESSFUL)
self.assertEqual(result.return_value, 42)
async def test_result_async(self):
result = await default_task_backend.aenqueue(
test_tasks.calculate_meaning_of_life, [], {}
)
self.assertEqual(result.status, TaskResultStatus.SUCCESSFUL)
self.assertEqual(result.return_value, 42)
async def test_cannot_get_result(self):
with self.assertRaisesMessage(
NotImplementedError,
"This backend does not support retrieving or refreshing results.",
):
default_task_backend.get_result("123")
with self.assertRaisesMessage(
NotImplementedError,
"This backend does not support retrieving or refreshing results.",
):
await default_task_backend.aget_result(123)
async def test_cannot_refresh_result(self):
result = await default_task_backend.aenqueue(
test_tasks.calculate_meaning_of_life, (), {}
)
with self.assertRaisesMessage(
NotImplementedError,
"This backend does not support retrieving or refreshing results.",
):
await result.arefresh()
with self.assertRaisesMessage(
NotImplementedError,
"This backend does not support retrieving or refreshing results.",
):
result.refresh()
def test_cannot_pass_run_after(self):
with self.assertRaisesMessage(
InvalidTask,
"Backend does not support run_after.",
):
default_task_backend.validate_task(
test_tasks.failing_task_value_error.using(run_after=timezone.now())
)
def test_enqueue_logs(self):
with self.assertLogs("django.tasks", level="DEBUG") as captured_logs:
result = test_tasks.noop_task.enqueue()
self.assertEqual(len(captured_logs.output), 3)
self.assertIn("enqueued", captured_logs.output[0])
self.assertIn(result.id, captured_logs.output[0])
self.assertIn("state=RUNNING", captured_logs.output[1])
self.assertIn(result.id, captured_logs.output[1])
self.assertIn("state=SUCCESSFUL", captured_logs.output[2])
self.assertIn(result.id, captured_logs.output[2])
def test_failed_logs(self):
with self.assertLogs("django.tasks", level="DEBUG") as captured_logs:
result = test_tasks.failing_task_value_error.enqueue()
self.assertEqual(len(captured_logs.output), 3)
self.assertIn("state=RUNNING", captured_logs.output[1])
self.assertIn(result.id, captured_logs.output[1])
self.assertIn("state=FAILED", captured_logs.output[2])
self.assertIn(result.id, captured_logs.output[2])
def test_takes_context(self):
result = test_tasks.get_task_id.enqueue()
self.assertEqual(result.return_value, result.id)
def test_context(self):
result = test_tasks.test_context.enqueue(1)
self.assertEqual(result.status, TaskResultStatus.SUCCESSFUL)
def test_validate_on_enqueue(self):
task_with_custom_queue_name = test_tasks.noop_task.using(
queue_name="unknown_queue"
)
with override_settings(
TASKS={
"default": {
"BACKEND": "django.tasks.backends.immediate.ImmediateBackend",
"QUEUES": ["queue-1"],
}
}
):
with self.assertRaisesMessage(
InvalidTask, "Queue 'unknown_queue' is not valid for backend"
):
task_with_custom_queue_name.enqueue()
async def test_validate_on_aenqueue(self):
task_with_custom_queue_name = test_tasks.noop_task.using(
queue_name="unknown_queue"
)
with override_settings(
TASKS={
"default": {
"BACKEND": "django.tasks.backends.immediate.ImmediateBackend",
"QUEUES": ["queue-1"],
}
}
):
with self.assertRaisesMessage(
InvalidTask, "Queue 'unknown_queue' is not valid for backend"
):
await task_with_custom_queue_name.aenqueue()
class ImmediateBackendTransactionTestCase(TransactionTestCase):
available_apps = []
@override_settings(
TASKS={
"default": {
"BACKEND": "django.tasks.backends.immediate.ImmediateBackend",
}
}
)
def test_doesnt_wait_until_transaction_commit_by_default(self):
with transaction.atomic():
result = test_tasks.noop_task.enqueue()
self.assertIsNotNone(result.enqueued_at)
self.assertEqual(result.status, TaskResultStatus.SUCCESSFUL)
self.assertEqual(result.status, TaskResultStatus.SUCCESSFUL)
|
