823 lines
25 KiB
Python
823 lines
25 KiB
Python
"""Tests for futures.py."""
|
|
|
|
import concurrent.futures
|
|
import gc
|
|
import re
|
|
import sys
|
|
import threading
|
|
import unittest
|
|
from unittest import mock
|
|
|
|
import asyncio
|
|
from asyncio import futures
|
|
from test.test_asyncio import utils as test_utils
|
|
from test import support
|
|
|
|
|
|
def _fakefunc(f):
|
|
return f
|
|
|
|
|
|
def first_cb():
|
|
pass
|
|
|
|
|
|
def last_cb():
|
|
pass
|
|
|
|
|
|
class DuckFuture:
|
|
# Class that does not inherit from Future but aims to be duck-type
|
|
# compatible with it.
|
|
|
|
_asyncio_future_blocking = False
|
|
__cancelled = False
|
|
__result = None
|
|
__exception = None
|
|
|
|
def cancel(self):
|
|
if self.done():
|
|
return False
|
|
self.__cancelled = True
|
|
return True
|
|
|
|
def cancelled(self):
|
|
return self.__cancelled
|
|
|
|
def done(self):
|
|
return (self.__cancelled
|
|
or self.__result is not None
|
|
or self.__exception is not None)
|
|
|
|
def result(self):
|
|
assert not self.cancelled()
|
|
if self.__exception is not None:
|
|
raise self.__exception
|
|
return self.__result
|
|
|
|
def exception(self):
|
|
assert not self.cancelled()
|
|
return self.__exception
|
|
|
|
def set_result(self, result):
|
|
assert not self.done()
|
|
assert result is not None
|
|
self.__result = result
|
|
|
|
def set_exception(self, exception):
|
|
assert not self.done()
|
|
assert exception is not None
|
|
self.__exception = exception
|
|
|
|
def __iter__(self):
|
|
if not self.done():
|
|
self._asyncio_future_blocking = True
|
|
yield self
|
|
assert self.done()
|
|
return self.result()
|
|
|
|
|
|
class DuckTests(test_utils.TestCase):
|
|
|
|
def setUp(self):
|
|
super().setUp()
|
|
self.loop = self.new_test_loop()
|
|
self.addCleanup(self.loop.close)
|
|
|
|
def test_wrap_future(self):
|
|
f = DuckFuture()
|
|
g = asyncio.wrap_future(f)
|
|
assert g is f
|
|
|
|
def test_ensure_future(self):
|
|
f = DuckFuture()
|
|
g = asyncio.ensure_future(f)
|
|
assert g is f
|
|
|
|
|
|
class BaseFutureTests:
|
|
|
|
def _new_future(self, *args, **kwargs):
|
|
return self.cls(*args, **kwargs)
|
|
|
|
def setUp(self):
|
|
super().setUp()
|
|
self.loop = self.new_test_loop()
|
|
self.addCleanup(self.loop.close)
|
|
|
|
def test_isfuture(self):
|
|
class MyFuture:
|
|
_asyncio_future_blocking = None
|
|
|
|
def __init__(self):
|
|
self._asyncio_future_blocking = False
|
|
|
|
self.assertFalse(asyncio.isfuture(MyFuture))
|
|
self.assertTrue(asyncio.isfuture(MyFuture()))
|
|
self.assertFalse(asyncio.isfuture(1))
|
|
|
|
# As `isinstance(Mock(), Future)` returns `False`
|
|
self.assertFalse(asyncio.isfuture(mock.Mock()))
|
|
|
|
f = self._new_future(loop=self.loop)
|
|
self.assertTrue(asyncio.isfuture(f))
|
|
self.assertFalse(asyncio.isfuture(type(f)))
|
|
|
|
# As `isinstance(Mock(Future), Future)` returns `True`
|
|
self.assertTrue(asyncio.isfuture(mock.Mock(type(f))))
|
|
|
|
f.cancel()
|
|
|
|
def test_initial_state(self):
|
|
f = self._new_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):
|
|
asyncio.set_event_loop(self.loop)
|
|
f = self._new_future()
|
|
self.assertIs(f._loop, self.loop)
|
|
self.assertIs(f.get_loop(), self.loop)
|
|
|
|
def test_constructor_positional(self):
|
|
# Make sure Future doesn't accept a positional argument
|
|
self.assertRaises(TypeError, self._new_future, 42)
|
|
|
|
def test_uninitialized(self):
|
|
# Test that C Future doesn't crash when Future.__init__()
|
|
# call was skipped.
|
|
|
|
fut = self.cls.__new__(self.cls, loop=self.loop)
|
|
self.assertRaises(asyncio.InvalidStateError, fut.result)
|
|
|
|
fut = self.cls.__new__(self.cls, loop=self.loop)
|
|
self.assertRaises(asyncio.InvalidStateError, fut.exception)
|
|
|
|
fut = self.cls.__new__(self.cls, loop=self.loop)
|
|
with self.assertRaises((RuntimeError, AttributeError)):
|
|
fut.set_result(None)
|
|
|
|
fut = self.cls.__new__(self.cls, loop=self.loop)
|
|
with self.assertRaises((RuntimeError, AttributeError)):
|
|
fut.set_exception(Exception)
|
|
|
|
fut = self.cls.__new__(self.cls, loop=self.loop)
|
|
with self.assertRaises((RuntimeError, AttributeError)):
|
|
fut.cancel()
|
|
|
|
fut = self.cls.__new__(self.cls, loop=self.loop)
|
|
with self.assertRaises((RuntimeError, AttributeError)):
|
|
fut.add_done_callback(lambda f: None)
|
|
|
|
fut = self.cls.__new__(self.cls, loop=self.loop)
|
|
with self.assertRaises((RuntimeError, AttributeError)):
|
|
fut.remove_done_callback(lambda f: None)
|
|
|
|
fut = self.cls.__new__(self.cls, loop=self.loop)
|
|
try:
|
|
repr(fut)
|
|
except (RuntimeError, AttributeError):
|
|
pass
|
|
|
|
fut = self.cls.__new__(self.cls, loop=self.loop)
|
|
try:
|
|
fut.__await__()
|
|
except RuntimeError:
|
|
pass
|
|
|
|
fut = self.cls.__new__(self.cls, loop=self.loop)
|
|
try:
|
|
iter(fut)
|
|
except RuntimeError:
|
|
pass
|
|
|
|
fut = self.cls.__new__(self.cls, loop=self.loop)
|
|
self.assertFalse(fut.cancelled())
|
|
self.assertFalse(fut.done())
|
|
|
|
def test_cancel(self):
|
|
f = self._new_future(loop=self.loop)
|
|
self.assertTrue(f.cancel())
|
|
self.assertTrue(f.cancelled())
|
|
self.assertTrue(f.done())
|
|
self.assertRaises(asyncio.CancelledError, f.result)
|
|
self.assertRaises(asyncio.CancelledError, f.exception)
|
|
self.assertRaises(asyncio.InvalidStateError, f.set_result, None)
|
|
self.assertRaises(asyncio.InvalidStateError, f.set_exception, None)
|
|
self.assertFalse(f.cancel())
|
|
|
|
def test_result(self):
|
|
f = self._new_future(loop=self.loop)
|
|
self.assertRaises(asyncio.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(asyncio.InvalidStateError, f.set_result, None)
|
|
self.assertRaises(asyncio.InvalidStateError, f.set_exception, None)
|
|
self.assertFalse(f.cancel())
|
|
|
|
def test_exception(self):
|
|
exc = RuntimeError()
|
|
f = self._new_future(loop=self.loop)
|
|
self.assertRaises(asyncio.InvalidStateError, f.exception)
|
|
|
|
# StopIteration cannot be raised into a Future - CPython issue26221
|
|
self.assertRaisesRegex(TypeError, "StopIteration .* cannot be raised",
|
|
f.set_exception, StopIteration)
|
|
|
|
f.set_exception(exc)
|
|
self.assertFalse(f.cancelled())
|
|
self.assertTrue(f.done())
|
|
self.assertRaises(RuntimeError, f.result)
|
|
self.assertEqual(f.exception(), exc)
|
|
self.assertRaises(asyncio.InvalidStateError, f.set_result, None)
|
|
self.assertRaises(asyncio.InvalidStateError, f.set_exception, None)
|
|
self.assertFalse(f.cancel())
|
|
|
|
def test_exception_class(self):
|
|
f = self._new_future(loop=self.loop)
|
|
f.set_exception(RuntimeError)
|
|
self.assertIsInstance(f.exception(), RuntimeError)
|
|
|
|
def test_yield_from_twice(self):
|
|
f = self._new_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_future_repr(self):
|
|
self.loop.set_debug(True)
|
|
f_pending_debug = self._new_future(loop=self.loop)
|
|
frame = f_pending_debug._source_traceback[-1]
|
|
self.assertEqual(
|
|
repr(f_pending_debug),
|
|
f'<{self.cls.__name__} pending created at {frame[0]}:{frame[1]}>')
|
|
f_pending_debug.cancel()
|
|
|
|
self.loop.set_debug(False)
|
|
f_pending = self._new_future(loop=self.loop)
|
|
self.assertEqual(repr(f_pending), f'<{self.cls.__name__} pending>')
|
|
f_pending.cancel()
|
|
|
|
f_cancelled = self._new_future(loop=self.loop)
|
|
f_cancelled.cancel()
|
|
self.assertEqual(repr(f_cancelled), f'<{self.cls.__name__} cancelled>')
|
|
|
|
f_result = self._new_future(loop=self.loop)
|
|
f_result.set_result(4)
|
|
self.assertEqual(
|
|
repr(f_result), f'<{self.cls.__name__} finished result=4>')
|
|
self.assertEqual(f_result.result(), 4)
|
|
|
|
exc = RuntimeError()
|
|
f_exception = self._new_future(loop=self.loop)
|
|
f_exception.set_exception(exc)
|
|
self.assertEqual(
|
|
repr(f_exception),
|
|
f'<{self.cls.__name__} finished exception=RuntimeError()>')
|
|
self.assertIs(f_exception.exception(), exc)
|
|
|
|
def func_repr(func):
|
|
filename, lineno = test_utils.get_function_source(func)
|
|
text = '%s() at %s:%s' % (func.__qualname__, filename, lineno)
|
|
return re.escape(text)
|
|
|
|
f_one_callbacks = self._new_future(loop=self.loop)
|
|
f_one_callbacks.add_done_callback(_fakefunc)
|
|
fake_repr = func_repr(_fakefunc)
|
|
self.assertRegex(
|
|
repr(f_one_callbacks),
|
|
r'<' + self.cls.__name__ + r' pending cb=\[%s\]>' % fake_repr)
|
|
f_one_callbacks.cancel()
|
|
self.assertEqual(repr(f_one_callbacks),
|
|
f'<{self.cls.__name__} cancelled>')
|
|
|
|
f_two_callbacks = self._new_future(loop=self.loop)
|
|
f_two_callbacks.add_done_callback(first_cb)
|
|
f_two_callbacks.add_done_callback(last_cb)
|
|
first_repr = func_repr(first_cb)
|
|
last_repr = func_repr(last_cb)
|
|
self.assertRegex(repr(f_two_callbacks),
|
|
r'<' + self.cls.__name__ + r' pending cb=\[%s, %s\]>'
|
|
% (first_repr, last_repr))
|
|
|
|
f_many_callbacks = self._new_future(loop=self.loop)
|
|
f_many_callbacks.add_done_callback(first_cb)
|
|
for i in range(8):
|
|
f_many_callbacks.add_done_callback(_fakefunc)
|
|
f_many_callbacks.add_done_callback(last_cb)
|
|
cb_regex = r'%s, <8 more>, %s' % (first_repr, last_repr)
|
|
self.assertRegex(
|
|
repr(f_many_callbacks),
|
|
r'<' + self.cls.__name__ + r' pending cb=\[%s\]>' % cb_regex)
|
|
f_many_callbacks.cancel()
|
|
self.assertEqual(repr(f_many_callbacks),
|
|
f'<{self.cls.__name__} cancelled>')
|
|
|
|
def test_copy_state(self):
|
|
from asyncio.futures import _copy_future_state
|
|
|
|
f = self._new_future(loop=self.loop)
|
|
f.set_result(10)
|
|
|
|
newf = self._new_future(loop=self.loop)
|
|
_copy_future_state(f, newf)
|
|
self.assertTrue(newf.done())
|
|
self.assertEqual(newf.result(), 10)
|
|
|
|
f_exception = self._new_future(loop=self.loop)
|
|
f_exception.set_exception(RuntimeError())
|
|
|
|
newf_exception = self._new_future(loop=self.loop)
|
|
_copy_future_state(f_exception, newf_exception)
|
|
self.assertTrue(newf_exception.done())
|
|
self.assertRaises(RuntimeError, newf_exception.result)
|
|
|
|
f_cancelled = self._new_future(loop=self.loop)
|
|
f_cancelled.cancel()
|
|
|
|
newf_cancelled = self._new_future(loop=self.loop)
|
|
_copy_future_state(f_cancelled, newf_cancelled)
|
|
self.assertTrue(newf_cancelled.cancelled())
|
|
|
|
def test_iter(self):
|
|
fut = self._new_future(loop=self.loop)
|
|
|
|
def coro():
|
|
yield from fut
|
|
|
|
def test():
|
|
arg1, arg2 = coro()
|
|
|
|
with self.assertRaisesRegex(RuntimeError, "await wasn't used"):
|
|
test()
|
|
fut.cancel()
|
|
|
|
def test_log_traceback(self):
|
|
fut = self._new_future(loop=self.loop)
|
|
with self.assertRaisesRegex(ValueError, 'can only be set to False'):
|
|
fut._log_traceback = True
|
|
|
|
@mock.patch('asyncio.base_events.logger')
|
|
def test_tb_logger_abandoned(self, m_log):
|
|
fut = self._new_future(loop=self.loop)
|
|
del fut
|
|
self.assertFalse(m_log.error.called)
|
|
|
|
@mock.patch('asyncio.base_events.logger')
|
|
def test_tb_logger_not_called_after_cancel(self, m_log):
|
|
fut = self._new_future(loop=self.loop)
|
|
fut.set_exception(Exception())
|
|
fut.cancel()
|
|
del fut
|
|
self.assertFalse(m_log.error.called)
|
|
|
|
@mock.patch('asyncio.base_events.logger')
|
|
def test_tb_logger_result_unretrieved(self, m_log):
|
|
fut = self._new_future(loop=self.loop)
|
|
fut.set_result(42)
|
|
del fut
|
|
self.assertFalse(m_log.error.called)
|
|
|
|
@mock.patch('asyncio.base_events.logger')
|
|
def test_tb_logger_result_retrieved(self, m_log):
|
|
fut = self._new_future(loop=self.loop)
|
|
fut.set_result(42)
|
|
fut.result()
|
|
del fut
|
|
self.assertFalse(m_log.error.called)
|
|
|
|
@mock.patch('asyncio.base_events.logger')
|
|
def test_tb_logger_exception_unretrieved(self, m_log):
|
|
fut = self._new_future(loop=self.loop)
|
|
fut.set_exception(RuntimeError('boom'))
|
|
del fut
|
|
test_utils.run_briefly(self.loop)
|
|
support.gc_collect()
|
|
self.assertTrue(m_log.error.called)
|
|
|
|
@mock.patch('asyncio.base_events.logger')
|
|
def test_tb_logger_exception_retrieved(self, m_log):
|
|
fut = self._new_future(loop=self.loop)
|
|
fut.set_exception(RuntimeError('boom'))
|
|
fut.exception()
|
|
del fut
|
|
self.assertFalse(m_log.error.called)
|
|
|
|
@mock.patch('asyncio.base_events.logger')
|
|
def test_tb_logger_exception_result_retrieved(self, m_log):
|
|
fut = self._new_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 = asyncio.wrap_future(f1, loop=self.loop)
|
|
res, ident = self.loop.run_until_complete(f2)
|
|
self.assertTrue(asyncio.isfuture(f2))
|
|
self.assertEqual(res, 'oi')
|
|
self.assertNotEqual(ident, threading.get_ident())
|
|
ex.shutdown(wait=True)
|
|
|
|
def test_wrap_future_future(self):
|
|
f1 = self._new_future(loop=self.loop)
|
|
f2 = asyncio.wrap_future(f1)
|
|
self.assertIs(f1, f2)
|
|
|
|
def test_wrap_future_use_global_loop(self):
|
|
with mock.patch('asyncio.futures.events') as events:
|
|
events.get_event_loop = lambda: self.loop
|
|
def run(arg):
|
|
return (arg, threading.get_ident())
|
|
ex = concurrent.futures.ThreadPoolExecutor(1)
|
|
f1 = ex.submit(run, 'oi')
|
|
f2 = asyncio.wrap_future(f1)
|
|
self.assertIs(self.loop, f2._loop)
|
|
ex.shutdown(wait=True)
|
|
|
|
def test_wrap_future_cancel(self):
|
|
f1 = concurrent.futures.Future()
|
|
f2 = asyncio.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 = asyncio.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())
|
|
|
|
def test_future_source_traceback(self):
|
|
self.loop.set_debug(True)
|
|
|
|
future = self._new_future(loop=self.loop)
|
|
lineno = sys._getframe().f_lineno - 1
|
|
self.assertIsInstance(future._source_traceback, list)
|
|
self.assertEqual(future._source_traceback[-2][:3],
|
|
(__file__,
|
|
lineno,
|
|
'test_future_source_traceback'))
|
|
|
|
@mock.patch('asyncio.base_events.logger')
|
|
def check_future_exception_never_retrieved(self, debug, m_log):
|
|
self.loop.set_debug(debug)
|
|
|
|
def memory_error():
|
|
try:
|
|
raise MemoryError()
|
|
except BaseException as exc:
|
|
return exc
|
|
exc = memory_error()
|
|
|
|
future = self._new_future(loop=self.loop)
|
|
future.set_exception(exc)
|
|
future = None
|
|
test_utils.run_briefly(self.loop)
|
|
support.gc_collect()
|
|
|
|
if sys.version_info >= (3, 4):
|
|
regex = f'^{self.cls.__name__} exception was never retrieved\n'
|
|
exc_info = (type(exc), exc, exc.__traceback__)
|
|
m_log.error.assert_called_once_with(mock.ANY, exc_info=exc_info)
|
|
else:
|
|
regex = r'^Future/Task exception was never retrieved\n'
|
|
m_log.error.assert_called_once_with(mock.ANY, exc_info=False)
|
|
message = m_log.error.call_args[0][0]
|
|
self.assertRegex(message, re.compile(regex, re.DOTALL))
|
|
|
|
def test_future_exception_never_retrieved(self):
|
|
self.check_future_exception_never_retrieved(False)
|
|
|
|
def test_future_exception_never_retrieved_debug(self):
|
|
self.check_future_exception_never_retrieved(True)
|
|
|
|
def test_set_result_unless_cancelled(self):
|
|
fut = self._new_future(loop=self.loop)
|
|
fut.cancel()
|
|
futures._set_result_unless_cancelled(fut, 2)
|
|
self.assertTrue(fut.cancelled())
|
|
|
|
def test_future_stop_iteration_args(self):
|
|
fut = self._new_future(loop=self.loop)
|
|
fut.set_result((1, 2))
|
|
fi = fut.__iter__()
|
|
result = None
|
|
try:
|
|
fi.send(None)
|
|
except StopIteration as ex:
|
|
result = ex.args[0]
|
|
else:
|
|
self.fail('StopIteration was expected')
|
|
self.assertEqual(result, (1, 2))
|
|
|
|
def test_future_iter_throw(self):
|
|
fut = self._new_future(loop=self.loop)
|
|
fi = iter(fut)
|
|
self.assertRaises(TypeError, fi.throw,
|
|
Exception, Exception("elephant"), 32)
|
|
self.assertRaises(TypeError, fi.throw,
|
|
Exception("elephant"), Exception("elephant"))
|
|
self.assertRaises(TypeError, fi.throw, list)
|
|
|
|
def test_future_del_collect(self):
|
|
class Evil:
|
|
def __del__(self):
|
|
gc.collect()
|
|
|
|
for i in range(100):
|
|
fut = self._new_future(loop=self.loop)
|
|
fut.set_result(Evil())
|
|
|
|
|
|
@unittest.skipUnless(hasattr(futures, '_CFuture'),
|
|
'requires the C _asyncio module')
|
|
class CFutureTests(BaseFutureTests, test_utils.TestCase):
|
|
try:
|
|
cls = futures._CFuture
|
|
except AttributeError:
|
|
cls = None
|
|
|
|
def test_future_del_segfault(self):
|
|
fut = self._new_future(loop=self.loop)
|
|
with self.assertRaises(AttributeError):
|
|
del fut._asyncio_future_blocking
|
|
with self.assertRaises(AttributeError):
|
|
del fut._log_traceback
|
|
|
|
|
|
@unittest.skipUnless(hasattr(futures, '_CFuture'),
|
|
'requires the C _asyncio module')
|
|
class CSubFutureTests(BaseFutureTests, test_utils.TestCase):
|
|
try:
|
|
class CSubFuture(futures._CFuture):
|
|
pass
|
|
|
|
cls = CSubFuture
|
|
except AttributeError:
|
|
cls = None
|
|
|
|
|
|
class PyFutureTests(BaseFutureTests, test_utils.TestCase):
|
|
cls = futures._PyFuture
|
|
|
|
|
|
class BaseFutureDoneCallbackTests():
|
|
|
|
def setUp(self):
|
|
super().setUp()
|
|
self.loop = self.new_test_loop()
|
|
|
|
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):
|
|
raise NotImplementedError
|
|
|
|
def test_callbacks_remove_first_callback(self):
|
|
bag = []
|
|
f = self._new_future()
|
|
|
|
cb1 = self._make_callback(bag, 42)
|
|
cb2 = self._make_callback(bag, 17)
|
|
cb3 = self._make_callback(bag, 100)
|
|
|
|
f.add_done_callback(cb1)
|
|
f.add_done_callback(cb2)
|
|
f.add_done_callback(cb3)
|
|
|
|
f.remove_done_callback(cb1)
|
|
f.remove_done_callback(cb1)
|
|
|
|
self.assertEqual(bag, [])
|
|
f.set_result('foo')
|
|
|
|
self.run_briefly()
|
|
|
|
self.assertEqual(bag, [17, 100])
|
|
self.assertEqual(f.result(), 'foo')
|
|
|
|
def test_callbacks_remove_first_and_second_callback(self):
|
|
bag = []
|
|
f = self._new_future()
|
|
|
|
cb1 = self._make_callback(bag, 42)
|
|
cb2 = self._make_callback(bag, 17)
|
|
cb3 = self._make_callback(bag, 100)
|
|
|
|
f.add_done_callback(cb1)
|
|
f.add_done_callback(cb2)
|
|
f.add_done_callback(cb3)
|
|
|
|
f.remove_done_callback(cb1)
|
|
f.remove_done_callback(cb2)
|
|
f.remove_done_callback(cb1)
|
|
|
|
self.assertEqual(bag, [])
|
|
f.set_result('foo')
|
|
|
|
self.run_briefly()
|
|
|
|
self.assertEqual(bag, [100])
|
|
self.assertEqual(f.result(), 'foo')
|
|
|
|
def test_callbacks_remove_third_callback(self):
|
|
bag = []
|
|
f = self._new_future()
|
|
|
|
cb1 = self._make_callback(bag, 42)
|
|
cb2 = self._make_callback(bag, 17)
|
|
cb3 = self._make_callback(bag, 100)
|
|
|
|
f.add_done_callback(cb1)
|
|
f.add_done_callback(cb2)
|
|
f.add_done_callback(cb3)
|
|
|
|
f.remove_done_callback(cb3)
|
|
f.remove_done_callback(cb3)
|
|
|
|
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_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')
|
|
|
|
def test_remove_done_callbacks_list_mutation(self):
|
|
# see http://bugs.python.org/issue28963 for details
|
|
|
|
fut = self._new_future()
|
|
fut.add_done_callback(str)
|
|
|
|
for _ in range(63):
|
|
fut.add_done_callback(id)
|
|
|
|
class evil:
|
|
def __eq__(self, other):
|
|
fut.remove_done_callback(id)
|
|
return False
|
|
|
|
fut.remove_done_callback(evil())
|
|
|
|
def test_schedule_callbacks_list_mutation_1(self):
|
|
# see http://bugs.python.org/issue28963 for details
|
|
|
|
def mut(f):
|
|
f.remove_done_callback(str)
|
|
|
|
fut = self._new_future()
|
|
fut.add_done_callback(mut)
|
|
fut.add_done_callback(str)
|
|
fut.add_done_callback(str)
|
|
fut.set_result(1)
|
|
test_utils.run_briefly(self.loop)
|
|
|
|
def test_schedule_callbacks_list_mutation_2(self):
|
|
# see http://bugs.python.org/issue30828 for details
|
|
|
|
fut = self._new_future()
|
|
fut.add_done_callback(str)
|
|
|
|
for _ in range(63):
|
|
fut.add_done_callback(id)
|
|
|
|
max_extra_cbs = 100
|
|
extra_cbs = 0
|
|
|
|
class evil:
|
|
def __eq__(self, other):
|
|
nonlocal extra_cbs
|
|
extra_cbs += 1
|
|
if extra_cbs < max_extra_cbs:
|
|
fut.add_done_callback(id)
|
|
return False
|
|
|
|
fut.remove_done_callback(evil())
|
|
|
|
|
|
@unittest.skipUnless(hasattr(futures, '_CFuture'),
|
|
'requires the C _asyncio module')
|
|
class CFutureDoneCallbackTests(BaseFutureDoneCallbackTests,
|
|
test_utils.TestCase):
|
|
|
|
def _new_future(self):
|
|
return futures._CFuture(loop=self.loop)
|
|
|
|
|
|
@unittest.skipUnless(hasattr(futures, '_CFuture'),
|
|
'requires the C _asyncio module')
|
|
class CSubFutureDoneCallbackTests(BaseFutureDoneCallbackTests,
|
|
test_utils.TestCase):
|
|
|
|
def _new_future(self):
|
|
class CSubFuture(futures._CFuture):
|
|
pass
|
|
return CSubFuture(loop=self.loop)
|
|
|
|
|
|
class PyFutureDoneCallbackTests(BaseFutureDoneCallbackTests,
|
|
test_utils.TestCase):
|
|
|
|
def _new_future(self):
|
|
return futures._PyFuture(loop=self.loop)
|
|
|
|
|
|
if __name__ == '__main__':
|
|
unittest.main()
|