mirror of
https://github.com/python/cpython.git
synced 2025-10-30 05:01:30 +00:00
291 lines
10 KiB
Python
291 lines
10 KiB
Python
import threading
|
|
import time
|
|
import unittest
|
|
from concurrent import futures
|
|
from concurrent.futures._base import (
|
|
PENDING, RUNNING, CANCELLED, CANCELLED_AND_NOTIFIED, FINISHED, Future)
|
|
|
|
from test import support
|
|
|
|
from .util import (
|
|
PENDING_FUTURE, RUNNING_FUTURE, CANCELLED_FUTURE,
|
|
CANCELLED_AND_NOTIFIED_FUTURE, EXCEPTION_FUTURE, SUCCESSFUL_FUTURE,
|
|
BaseTestCase, create_future, setup_module)
|
|
|
|
|
|
class FutureTests(BaseTestCase):
|
|
def test_done_callback_with_result(self):
|
|
callback_result = None
|
|
def fn(callback_future):
|
|
nonlocal callback_result
|
|
callback_result = callback_future.result()
|
|
|
|
f = Future()
|
|
f.add_done_callback(fn)
|
|
f.set_result(5)
|
|
self.assertEqual(5, callback_result)
|
|
|
|
def test_done_callback_with_exception(self):
|
|
callback_exception = None
|
|
def fn(callback_future):
|
|
nonlocal callback_exception
|
|
callback_exception = callback_future.exception()
|
|
|
|
f = Future()
|
|
f.add_done_callback(fn)
|
|
f.set_exception(Exception('test'))
|
|
self.assertEqual(('test',), callback_exception.args)
|
|
|
|
def test_done_callback_with_cancel(self):
|
|
was_cancelled = None
|
|
def fn(callback_future):
|
|
nonlocal was_cancelled
|
|
was_cancelled = callback_future.cancelled()
|
|
|
|
f = Future()
|
|
f.add_done_callback(fn)
|
|
self.assertTrue(f.cancel())
|
|
self.assertTrue(was_cancelled)
|
|
|
|
def test_done_callback_raises(self):
|
|
with support.captured_stderr() as stderr:
|
|
raising_was_called = False
|
|
fn_was_called = False
|
|
|
|
def raising_fn(callback_future):
|
|
nonlocal raising_was_called
|
|
raising_was_called = True
|
|
raise Exception('doh!')
|
|
|
|
def fn(callback_future):
|
|
nonlocal fn_was_called
|
|
fn_was_called = True
|
|
|
|
f = Future()
|
|
f.add_done_callback(raising_fn)
|
|
f.add_done_callback(fn)
|
|
f.set_result(5)
|
|
self.assertTrue(raising_was_called)
|
|
self.assertTrue(fn_was_called)
|
|
self.assertIn('Exception: doh!', stderr.getvalue())
|
|
|
|
def test_done_callback_already_successful(self):
|
|
callback_result = None
|
|
def fn(callback_future):
|
|
nonlocal callback_result
|
|
callback_result = callback_future.result()
|
|
|
|
f = Future()
|
|
f.set_result(5)
|
|
f.add_done_callback(fn)
|
|
self.assertEqual(5, callback_result)
|
|
|
|
def test_done_callback_already_failed(self):
|
|
callback_exception = None
|
|
def fn(callback_future):
|
|
nonlocal callback_exception
|
|
callback_exception = callback_future.exception()
|
|
|
|
f = Future()
|
|
f.set_exception(Exception('test'))
|
|
f.add_done_callback(fn)
|
|
self.assertEqual(('test',), callback_exception.args)
|
|
|
|
def test_done_callback_already_cancelled(self):
|
|
was_cancelled = None
|
|
def fn(callback_future):
|
|
nonlocal was_cancelled
|
|
was_cancelled = callback_future.cancelled()
|
|
|
|
f = Future()
|
|
self.assertTrue(f.cancel())
|
|
f.add_done_callback(fn)
|
|
self.assertTrue(was_cancelled)
|
|
|
|
def test_done_callback_raises_already_succeeded(self):
|
|
with support.captured_stderr() as stderr:
|
|
def raising_fn(callback_future):
|
|
raise Exception('doh!')
|
|
|
|
f = Future()
|
|
|
|
# Set the result first to simulate a future that runs instantly,
|
|
# effectively allowing the callback to be run immediately.
|
|
f.set_result(5)
|
|
f.add_done_callback(raising_fn)
|
|
|
|
self.assertIn('exception calling callback for', stderr.getvalue())
|
|
self.assertIn('doh!', stderr.getvalue())
|
|
|
|
|
|
def test_repr(self):
|
|
self.assertRegex(repr(PENDING_FUTURE),
|
|
'<Future at 0x[0-9a-f]+ state=pending>')
|
|
self.assertRegex(repr(RUNNING_FUTURE),
|
|
'<Future at 0x[0-9a-f]+ state=running>')
|
|
self.assertRegex(repr(CANCELLED_FUTURE),
|
|
'<Future at 0x[0-9a-f]+ state=cancelled>')
|
|
self.assertRegex(repr(CANCELLED_AND_NOTIFIED_FUTURE),
|
|
'<Future at 0x[0-9a-f]+ state=cancelled>')
|
|
self.assertRegex(
|
|
repr(EXCEPTION_FUTURE),
|
|
'<Future at 0x[0-9a-f]+ state=finished raised OSError>')
|
|
self.assertRegex(
|
|
repr(SUCCESSFUL_FUTURE),
|
|
'<Future at 0x[0-9a-f]+ state=finished returned int>')
|
|
|
|
def test_cancel(self):
|
|
f1 = create_future(state=PENDING)
|
|
f2 = create_future(state=RUNNING)
|
|
f3 = create_future(state=CANCELLED)
|
|
f4 = create_future(state=CANCELLED_AND_NOTIFIED)
|
|
f5 = create_future(state=FINISHED, exception=OSError())
|
|
f6 = create_future(state=FINISHED, result=5)
|
|
|
|
self.assertTrue(f1.cancel())
|
|
self.assertEqual(f1._state, CANCELLED)
|
|
|
|
self.assertFalse(f2.cancel())
|
|
self.assertEqual(f2._state, RUNNING)
|
|
|
|
self.assertTrue(f3.cancel())
|
|
self.assertEqual(f3._state, CANCELLED)
|
|
|
|
self.assertTrue(f4.cancel())
|
|
self.assertEqual(f4._state, CANCELLED_AND_NOTIFIED)
|
|
|
|
self.assertFalse(f5.cancel())
|
|
self.assertEqual(f5._state, FINISHED)
|
|
|
|
self.assertFalse(f6.cancel())
|
|
self.assertEqual(f6._state, FINISHED)
|
|
|
|
def test_cancelled(self):
|
|
self.assertFalse(PENDING_FUTURE.cancelled())
|
|
self.assertFalse(RUNNING_FUTURE.cancelled())
|
|
self.assertTrue(CANCELLED_FUTURE.cancelled())
|
|
self.assertTrue(CANCELLED_AND_NOTIFIED_FUTURE.cancelled())
|
|
self.assertFalse(EXCEPTION_FUTURE.cancelled())
|
|
self.assertFalse(SUCCESSFUL_FUTURE.cancelled())
|
|
|
|
def test_done(self):
|
|
self.assertFalse(PENDING_FUTURE.done())
|
|
self.assertFalse(RUNNING_FUTURE.done())
|
|
self.assertTrue(CANCELLED_FUTURE.done())
|
|
self.assertTrue(CANCELLED_AND_NOTIFIED_FUTURE.done())
|
|
self.assertTrue(EXCEPTION_FUTURE.done())
|
|
self.assertTrue(SUCCESSFUL_FUTURE.done())
|
|
|
|
def test_running(self):
|
|
self.assertFalse(PENDING_FUTURE.running())
|
|
self.assertTrue(RUNNING_FUTURE.running())
|
|
self.assertFalse(CANCELLED_FUTURE.running())
|
|
self.assertFalse(CANCELLED_AND_NOTIFIED_FUTURE.running())
|
|
self.assertFalse(EXCEPTION_FUTURE.running())
|
|
self.assertFalse(SUCCESSFUL_FUTURE.running())
|
|
|
|
def test_result_with_timeout(self):
|
|
self.assertRaises(futures.TimeoutError,
|
|
PENDING_FUTURE.result, timeout=0)
|
|
self.assertRaises(futures.TimeoutError,
|
|
RUNNING_FUTURE.result, timeout=0)
|
|
self.assertRaises(futures.CancelledError,
|
|
CANCELLED_FUTURE.result, timeout=0)
|
|
self.assertRaises(futures.CancelledError,
|
|
CANCELLED_AND_NOTIFIED_FUTURE.result, timeout=0)
|
|
self.assertRaises(OSError, EXCEPTION_FUTURE.result, timeout=0)
|
|
self.assertEqual(SUCCESSFUL_FUTURE.result(timeout=0), 42)
|
|
|
|
def test_result_with_success(self):
|
|
# TODO(brian@sweetapp.com): This test is timing dependent.
|
|
def notification():
|
|
# Wait until the main thread is waiting for the result.
|
|
time.sleep(1)
|
|
f1.set_result(42)
|
|
|
|
f1 = create_future(state=PENDING)
|
|
t = threading.Thread(target=notification)
|
|
t.start()
|
|
|
|
self.assertEqual(f1.result(timeout=5), 42)
|
|
t.join()
|
|
|
|
def test_result_with_cancel(self):
|
|
# TODO(brian@sweetapp.com): This test is timing dependent.
|
|
def notification():
|
|
# Wait until the main thread is waiting for the result.
|
|
time.sleep(1)
|
|
f1.cancel()
|
|
|
|
f1 = create_future(state=PENDING)
|
|
t = threading.Thread(target=notification)
|
|
t.start()
|
|
|
|
self.assertRaises(futures.CancelledError,
|
|
f1.result, timeout=support.SHORT_TIMEOUT)
|
|
t.join()
|
|
|
|
def test_exception_with_timeout(self):
|
|
self.assertRaises(futures.TimeoutError,
|
|
PENDING_FUTURE.exception, timeout=0)
|
|
self.assertRaises(futures.TimeoutError,
|
|
RUNNING_FUTURE.exception, timeout=0)
|
|
self.assertRaises(futures.CancelledError,
|
|
CANCELLED_FUTURE.exception, timeout=0)
|
|
self.assertRaises(futures.CancelledError,
|
|
CANCELLED_AND_NOTIFIED_FUTURE.exception, timeout=0)
|
|
self.assertTrue(isinstance(EXCEPTION_FUTURE.exception(timeout=0),
|
|
OSError))
|
|
self.assertEqual(SUCCESSFUL_FUTURE.exception(timeout=0), None)
|
|
|
|
def test_exception_with_success(self):
|
|
def notification():
|
|
# Wait until the main thread is waiting for the exception.
|
|
time.sleep(1)
|
|
with f1._condition:
|
|
f1._state = FINISHED
|
|
f1._exception = OSError()
|
|
f1._condition.notify_all()
|
|
|
|
f1 = create_future(state=PENDING)
|
|
t = threading.Thread(target=notification)
|
|
t.start()
|
|
|
|
self.assertTrue(isinstance(f1.exception(timeout=support.SHORT_TIMEOUT), OSError))
|
|
t.join()
|
|
|
|
def test_multiple_set_result(self):
|
|
f = create_future(state=PENDING)
|
|
f.set_result(1)
|
|
|
|
with self.assertRaisesRegex(
|
|
futures.InvalidStateError,
|
|
'FINISHED: <Future at 0x[0-9a-f]+ '
|
|
'state=finished returned int>'
|
|
):
|
|
f.set_result(2)
|
|
|
|
self.assertTrue(f.done())
|
|
self.assertEqual(f.result(), 1)
|
|
|
|
def test_multiple_set_exception(self):
|
|
f = create_future(state=PENDING)
|
|
e = ValueError()
|
|
f.set_exception(e)
|
|
|
|
with self.assertRaisesRegex(
|
|
futures.InvalidStateError,
|
|
'FINISHED: <Future at 0x[0-9a-f]+ '
|
|
'state=finished raised ValueError>'
|
|
):
|
|
f.set_exception(Exception())
|
|
|
|
self.assertEqual(f.exception(), e)
|
|
|
|
|
|
def setUpModule():
|
|
setup_module()
|
|
|
|
|
|
if __name__ == "__main__":
|
|
unittest.main()
|