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"""Tests support for new syntax introduced by PEP 492."""
import collections.abc
import types
import unittest
try:
from test import support
except ImportError:
from asyncio import test_support as support
from unittest import mock
import asyncio
from asyncio import test_utils
class BaseTest(test_utils.TestCase):
def setUp(self):
super().setUp()
self.loop = asyncio.BaseEventLoop()
self.loop._process_events = mock.Mock()
self.loop._selector = mock.Mock()
self.loop._selector.select.return_value = ()
self.set_event_loop(self.loop)
class LockTests(BaseTest):
def test_context_manager_async_with(self):
primitives = [
asyncio.Lock(loop=self.loop),
asyncio.Condition(loop=self.loop),
asyncio.Semaphore(loop=self.loop),
asyncio.BoundedSemaphore(loop=self.loop),
]
async def test(lock):
await asyncio.sleep(0.01, loop=self.loop)
self.assertFalse(lock.locked())
async with lock as _lock:
self.assertIs(_lock, None)
self.assertTrue(lock.locked())
await asyncio.sleep(0.01, loop=self.loop)
self.assertTrue(lock.locked())
self.assertFalse(lock.locked())
for primitive in primitives:
self.loop.run_until_complete(test(primitive))
self.assertFalse(primitive.locked())
def test_context_manager_with_await(self):
primitives = [
asyncio.Lock(loop=self.loop),
asyncio.Condition(loop=self.loop),
asyncio.Semaphore(loop=self.loop),
asyncio.BoundedSemaphore(loop=self.loop),
]
async def test(lock):
await asyncio.sleep(0.01, loop=self.loop)
self.assertFalse(lock.locked())
with await lock as _lock:
self.assertIs(_lock, None)
self.assertTrue(lock.locked())
await asyncio.sleep(0.01, loop=self.loop)
self.assertTrue(lock.locked())
self.assertFalse(lock.locked())
for primitive in primitives:
self.loop.run_until_complete(test(primitive))
self.assertFalse(primitive.locked())
class StreamReaderTests(BaseTest):
def test_readline(self):
DATA = b'line1\nline2\nline3'
stream = asyncio.StreamReader(loop=self.loop)
stream.feed_data(DATA)
stream.feed_eof()
async def reader():
data = []
async for line in stream:
data.append(line)
return data
data = self.loop.run_until_complete(reader())
self.assertEqual(data, [b'line1\n', b'line2\n', b'line3'])
class CoroutineTests(BaseTest):
def test_iscoroutine(self):
async def foo(): pass
f = foo()
try:
self.assertTrue(asyncio.iscoroutine(f))
finally:
f.close() # silence warning
# Test that asyncio.iscoroutine() uses collections.abc.Coroutine
class FakeCoro:
def send(self, value): pass
def throw(self, typ, val=None, tb=None): pass
def close(self): pass
def __await__(self): yield
self.assertTrue(asyncio.iscoroutine(FakeCoro()))
def test_iscoroutinefunction(self):
async def foo(): pass
self.assertTrue(asyncio.iscoroutinefunction(foo))
def test_function_returning_awaitable(self):
class Awaitable:
def __await__(self):
return ('spam',)
@asyncio.coroutine
def func():
return Awaitable()
coro = func()
self.assertEqual(coro.send(None), 'spam')
coro.close()
def test_async_def_coroutines(self):
async def bar():
return 'spam'
async def foo():
return await bar()
# production mode
data = self.loop.run_until_complete(foo())
self.assertEqual(data, 'spam')
# debug mode
self.loop.set_debug(True)
data = self.loop.run_until_complete(foo())
self.assertEqual(data, 'spam')
@mock.patch('asyncio.coroutines.logger')
def test_async_def_wrapped(self, m_log):
async def foo():
pass
async def start():
foo_coro = foo()
self.assertRegex(
repr(foo_coro),
r'<CoroWrapper .*\.foo\(\) running at .*pep492.*>')
with support.check_warnings((r'.*foo.*was never',
RuntimeWarning)):
foo_coro = None
support.gc_collect()
self.assertTrue(m_log.error.called)
message = m_log.error.call_args[0][0]
self.assertRegex(message,
r'CoroWrapper.*foo.*was never')
self.loop.set_debug(True)
self.loop.run_until_complete(start())
async def start():
foo_coro = foo()
task = asyncio.ensure_future(foo_coro, loop=self.loop)
self.assertRegex(repr(task), r'Task.*foo.*running')
self.loop.run_until_complete(start())
def test_types_coroutine(self):
def gen():
yield from ()
return 'spam'
@types.coroutine
def func():
return gen()
async def coro():
wrapper = func()
self.assertIsInstance(wrapper, types._GeneratorWrapper)
return await wrapper
data = self.loop.run_until_complete(coro())
self.assertEqual(data, 'spam')
def test_task_print_stack(self):
T = None
async def foo():
f = T.get_stack(limit=1)
try:
self.assertEqual(f[0].f_code.co_name, 'foo')
finally:
f = None
async def runner():
nonlocal T
T = asyncio.ensure_future(foo(), loop=self.loop)
await T
self.loop.run_until_complete(runner())
def test_double_await(self):
async def afunc():
await asyncio.sleep(0.1, loop=self.loop)
async def runner():
coro = afunc()
t = asyncio.Task(coro, loop=self.loop)
try:
await asyncio.sleep(0, loop=self.loop)
await coro
finally:
t.cancel()
self.loop.set_debug(True)
with self.assertRaisesRegex(
RuntimeError,
r'Cannot await.*test_double_await.*\bafunc\b.*while.*\bsleep\b'):
self.loop.run_until_complete(runner())
if __name__ == '__main__':
unittest.main()
|
