mirror of https://github.com/python/cpython
348 lines
11 KiB
Python
348 lines
11 KiB
Python
"""Tests for futures.py."""
|
|
|
|
import concurrent.futures
|
|
import threading
|
|
import unittest
|
|
import unittest.mock
|
|
|
|
from asyncio import events
|
|
from asyncio import futures
|
|
from asyncio import test_utils
|
|
|
|
|
|
def _fakefunc(f):
|
|
return f
|
|
|
|
|
|
class FutureTests(unittest.TestCase):
|
|
|
|
def setUp(self):
|
|
self.loop = test_utils.TestLoop()
|
|
events.set_event_loop(None)
|
|
|
|
def tearDown(self):
|
|
self.loop.close()
|
|
|
|
def test_initial_state(self):
|
|
f = futures.Future(loop=self.loop)
|
|
self.assertFalse(f.cancelled())
|
|
self.assertFalse(f.done())
|
|
f.cancel()
|
|
self.assertTrue(f.cancelled())
|
|
|
|
def test_init_constructor_default_loop(self):
|
|
try:
|
|
events.set_event_loop(self.loop)
|
|
f = futures.Future()
|
|
self.assertIs(f._loop, self.loop)
|
|
finally:
|
|
events.set_event_loop(None)
|
|
|
|
def test_constructor_positional(self):
|
|
# Make sure Future does't accept a positional argument
|
|
self.assertRaises(TypeError, futures.Future, 42)
|
|
|
|
def test_cancel(self):
|
|
f = futures.Future(loop=self.loop)
|
|
self.assertTrue(f.cancel())
|
|
self.assertTrue(f.cancelled())
|
|
self.assertTrue(f.done())
|
|
self.assertRaises(futures.CancelledError, f.result)
|
|
self.assertRaises(futures.CancelledError, f.exception)
|
|
self.assertRaises(futures.InvalidStateError, f.set_result, None)
|
|
self.assertRaises(futures.InvalidStateError, f.set_exception, None)
|
|
self.assertFalse(f.cancel())
|
|
|
|
def test_result(self):
|
|
f = futures.Future(loop=self.loop)
|
|
self.assertRaises(futures.InvalidStateError, f.result)
|
|
|
|
f.set_result(42)
|
|
self.assertFalse(f.cancelled())
|
|
self.assertTrue(f.done())
|
|
self.assertEqual(f.result(), 42)
|
|
self.assertEqual(f.exception(), None)
|
|
self.assertRaises(futures.InvalidStateError, f.set_result, None)
|
|
self.assertRaises(futures.InvalidStateError, f.set_exception, None)
|
|
self.assertFalse(f.cancel())
|
|
|
|
def test_exception(self):
|
|
exc = RuntimeError()
|
|
f = futures.Future(loop=self.loop)
|
|
self.assertRaises(futures.InvalidStateError, f.exception)
|
|
|
|
f.set_exception(exc)
|
|
self.assertFalse(f.cancelled())
|
|
self.assertTrue(f.done())
|
|
self.assertRaises(RuntimeError, f.result)
|
|
self.assertEqual(f.exception(), exc)
|
|
self.assertRaises(futures.InvalidStateError, f.set_result, None)
|
|
self.assertRaises(futures.InvalidStateError, f.set_exception, None)
|
|
self.assertFalse(f.cancel())
|
|
|
|
def test_yield_from_twice(self):
|
|
f = futures.Future(loop=self.loop)
|
|
|
|
def fixture():
|
|
yield 'A'
|
|
x = yield from f
|
|
yield 'B', x
|
|
y = yield from f
|
|
yield 'C', y
|
|
|
|
g = fixture()
|
|
self.assertEqual(next(g), 'A') # yield 'A'.
|
|
self.assertEqual(next(g), f) # First yield from f.
|
|
f.set_result(42)
|
|
self.assertEqual(next(g), ('B', 42)) # yield 'B', x.
|
|
# The second "yield from f" does not yield f.
|
|
self.assertEqual(next(g), ('C', 42)) # yield 'C', y.
|
|
|
|
def test_repr(self):
|
|
f_pending = futures.Future(loop=self.loop)
|
|
self.assertEqual(repr(f_pending), 'Future<PENDING>')
|
|
f_pending.cancel()
|
|
|
|
f_cancelled = futures.Future(loop=self.loop)
|
|
f_cancelled.cancel()
|
|
self.assertEqual(repr(f_cancelled), 'Future<CANCELLED>')
|
|
|
|
f_result = futures.Future(loop=self.loop)
|
|
f_result.set_result(4)
|
|
self.assertEqual(repr(f_result), 'Future<result=4>')
|
|
self.assertEqual(f_result.result(), 4)
|
|
|
|
exc = RuntimeError()
|
|
f_exception = futures.Future(loop=self.loop)
|
|
f_exception.set_exception(exc)
|
|
self.assertEqual(repr(f_exception), 'Future<exception=RuntimeError()>')
|
|
self.assertIs(f_exception.exception(), exc)
|
|
|
|
f_few_callbacks = futures.Future(loop=self.loop)
|
|
f_few_callbacks.add_done_callback(_fakefunc)
|
|
self.assertIn('Future<PENDING, [<function _fakefunc',
|
|
repr(f_few_callbacks))
|
|
f_few_callbacks.cancel()
|
|
|
|
f_many_callbacks = futures.Future(loop=self.loop)
|
|
for i in range(20):
|
|
f_many_callbacks.add_done_callback(_fakefunc)
|
|
r = repr(f_many_callbacks)
|
|
self.assertIn('Future<PENDING, [<function _fakefunc', r)
|
|
self.assertIn('<18 more>', r)
|
|
f_many_callbacks.cancel()
|
|
|
|
def test_copy_state(self):
|
|
# Test the internal _copy_state method since it's being directly
|
|
# invoked in other modules.
|
|
f = futures.Future(loop=self.loop)
|
|
f.set_result(10)
|
|
|
|
newf = futures.Future(loop=self.loop)
|
|
newf._copy_state(f)
|
|
self.assertTrue(newf.done())
|
|
self.assertEqual(newf.result(), 10)
|
|
|
|
f_exception = futures.Future(loop=self.loop)
|
|
f_exception.set_exception(RuntimeError())
|
|
|
|
newf_exception = futures.Future(loop=self.loop)
|
|
newf_exception._copy_state(f_exception)
|
|
self.assertTrue(newf_exception.done())
|
|
self.assertRaises(RuntimeError, newf_exception.result)
|
|
|
|
f_cancelled = futures.Future(loop=self.loop)
|
|
f_cancelled.cancel()
|
|
|
|
newf_cancelled = futures.Future(loop=self.loop)
|
|
newf_cancelled._copy_state(f_cancelled)
|
|
self.assertTrue(newf_cancelled.cancelled())
|
|
|
|
def test_iter(self):
|
|
fut = futures.Future(loop=self.loop)
|
|
|
|
def coro():
|
|
yield from fut
|
|
|
|
def test():
|
|
arg1, arg2 = coro()
|
|
|
|
self.assertRaises(AssertionError, test)
|
|
fut.cancel()
|
|
|
|
@unittest.mock.patch('asyncio.futures.logger')
|
|
def test_tb_logger_abandoned(self, m_log):
|
|
fut = futures.Future(loop=self.loop)
|
|
del fut
|
|
self.assertFalse(m_log.error.called)
|
|
|
|
@unittest.mock.patch('asyncio.futures.logger')
|
|
def test_tb_logger_result_unretrieved(self, m_log):
|
|
fut = futures.Future(loop=self.loop)
|
|
fut.set_result(42)
|
|
del fut
|
|
self.assertFalse(m_log.error.called)
|
|
|
|
@unittest.mock.patch('asyncio.futures.logger')
|
|
def test_tb_logger_result_retrieved(self, m_log):
|
|
fut = futures.Future(loop=self.loop)
|
|
fut.set_result(42)
|
|
fut.result()
|
|
del fut
|
|
self.assertFalse(m_log.error.called)
|
|
|
|
@unittest.mock.patch('asyncio.futures.logger')
|
|
def test_tb_logger_exception_unretrieved(self, m_log):
|
|
fut = futures.Future(loop=self.loop)
|
|
fut.set_exception(RuntimeError('boom'))
|
|
del fut
|
|
test_utils.run_briefly(self.loop)
|
|
self.assertTrue(m_log.error.called)
|
|
|
|
@unittest.mock.patch('asyncio.futures.logger')
|
|
def test_tb_logger_exception_retrieved(self, m_log):
|
|
fut = futures.Future(loop=self.loop)
|
|
fut.set_exception(RuntimeError('boom'))
|
|
fut.exception()
|
|
del fut
|
|
self.assertFalse(m_log.error.called)
|
|
|
|
@unittest.mock.patch('asyncio.futures.logger')
|
|
def test_tb_logger_exception_result_retrieved(self, m_log):
|
|
fut = futures.Future(loop=self.loop)
|
|
fut.set_exception(RuntimeError('boom'))
|
|
self.assertRaises(RuntimeError, fut.result)
|
|
del fut
|
|
self.assertFalse(m_log.error.called)
|
|
|
|
def test_wrap_future(self):
|
|
|
|
def run(arg):
|
|
return (arg, threading.get_ident())
|
|
ex = concurrent.futures.ThreadPoolExecutor(1)
|
|
f1 = ex.submit(run, 'oi')
|
|
f2 = futures.wrap_future(f1, loop=self.loop)
|
|
res, ident = self.loop.run_until_complete(f2)
|
|
self.assertIsInstance(f2, futures.Future)
|
|
self.assertEqual(res, 'oi')
|
|
self.assertNotEqual(ident, threading.get_ident())
|
|
|
|
def test_wrap_future_future(self):
|
|
f1 = futures.Future(loop=self.loop)
|
|
f2 = futures.wrap_future(f1)
|
|
self.assertIs(f1, f2)
|
|
|
|
@unittest.mock.patch('asyncio.futures.events')
|
|
def test_wrap_future_use_global_loop(self, m_events):
|
|
def run(arg):
|
|
return (arg, threading.get_ident())
|
|
ex = concurrent.futures.ThreadPoolExecutor(1)
|
|
f1 = ex.submit(run, 'oi')
|
|
f2 = futures.wrap_future(f1)
|
|
self.assertIs(m_events.get_event_loop.return_value, f2._loop)
|
|
|
|
def test_wrap_future_cancel(self):
|
|
f1 = concurrent.futures.Future()
|
|
f2 = futures.wrap_future(f1, loop=self.loop)
|
|
f2.cancel()
|
|
test_utils.run_briefly(self.loop)
|
|
self.assertTrue(f1.cancelled())
|
|
self.assertTrue(f2.cancelled())
|
|
|
|
def test_wrap_future_cancel2(self):
|
|
f1 = concurrent.futures.Future()
|
|
f2 = futures.wrap_future(f1, loop=self.loop)
|
|
f1.set_result(42)
|
|
f2.cancel()
|
|
test_utils.run_briefly(self.loop)
|
|
self.assertFalse(f1.cancelled())
|
|
self.assertEqual(f1.result(), 42)
|
|
self.assertTrue(f2.cancelled())
|
|
|
|
|
|
class FutureDoneCallbackTests(unittest.TestCase):
|
|
|
|
def setUp(self):
|
|
self.loop = test_utils.TestLoop()
|
|
events.set_event_loop(None)
|
|
|
|
def tearDown(self):
|
|
self.loop.close()
|
|
|
|
def run_briefly(self):
|
|
test_utils.run_briefly(self.loop)
|
|
|
|
def _make_callback(self, bag, thing):
|
|
# Create a callback function that appends thing to bag.
|
|
def bag_appender(future):
|
|
bag.append(thing)
|
|
return bag_appender
|
|
|
|
def _new_future(self):
|
|
return futures.Future(loop=self.loop)
|
|
|
|
def test_callbacks_invoked_on_set_result(self):
|
|
bag = []
|
|
f = self._new_future()
|
|
f.add_done_callback(self._make_callback(bag, 42))
|
|
f.add_done_callback(self._make_callback(bag, 17))
|
|
|
|
self.assertEqual(bag, [])
|
|
f.set_result('foo')
|
|
|
|
self.run_briefly()
|
|
|
|
self.assertEqual(bag, [42, 17])
|
|
self.assertEqual(f.result(), 'foo')
|
|
|
|
def test_callbacks_invoked_on_set_exception(self):
|
|
bag = []
|
|
f = self._new_future()
|
|
f.add_done_callback(self._make_callback(bag, 100))
|
|
|
|
self.assertEqual(bag, [])
|
|
exc = RuntimeError()
|
|
f.set_exception(exc)
|
|
|
|
self.run_briefly()
|
|
|
|
self.assertEqual(bag, [100])
|
|
self.assertEqual(f.exception(), exc)
|
|
|
|
def test_remove_done_callback(self):
|
|
bag = []
|
|
f = self._new_future()
|
|
cb1 = self._make_callback(bag, 1)
|
|
cb2 = self._make_callback(bag, 2)
|
|
cb3 = self._make_callback(bag, 3)
|
|
|
|
# Add one cb1 and one cb2.
|
|
f.add_done_callback(cb1)
|
|
f.add_done_callback(cb2)
|
|
|
|
# One instance of cb2 removed. Now there's only one cb1.
|
|
self.assertEqual(f.remove_done_callback(cb2), 1)
|
|
|
|
# Never had any cb3 in there.
|
|
self.assertEqual(f.remove_done_callback(cb3), 0)
|
|
|
|
# After this there will be 6 instances of cb1 and one of cb2.
|
|
f.add_done_callback(cb2)
|
|
for i in range(5):
|
|
f.add_done_callback(cb1)
|
|
|
|
# Remove all instances of cb1. One cb2 remains.
|
|
self.assertEqual(f.remove_done_callback(cb1), 6)
|
|
|
|
self.assertEqual(bag, [])
|
|
f.set_result('foo')
|
|
|
|
self.run_briefly()
|
|
|
|
self.assertEqual(bag, [2])
|
|
self.assertEqual(f.result(), 'foo')
|
|
|
|
|
|
if __name__ == '__main__':
|
|
unittest.main()
|