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from trollius import subprocess
from trollius import test_utils
import trollius as asyncio
import os
import signal
import sys
import unittest
from trollius import From, Return
from trollius import test_support as support
if sys.platform != 'win32':
from trollius import unix_events
from trollius.py33_exceptions import BrokenPipeError, ConnectionResetError
# Program blocking
PROGRAM_BLOCKED = [sys.executable, '-c', 'import time; time.sleep(3600)']
# Program copying input to output
if sys.version_info >= (3,):
PROGRAM_CAT = ';'.join(('import sys',
'data = sys.stdin.buffer.read()',
'sys.stdout.buffer.write(data)'))
else:
PROGRAM_CAT = ';'.join(('import sys',
'data = sys.stdin.read()',
'sys.stdout.write(data)'))
PROGRAM_CAT = [sys.executable, '-c', PROGRAM_CAT]
class SubprocessMixin(object):
def test_stdin_stdout(self):
args = PROGRAM_CAT
@asyncio.coroutine
def run(data):
proc = yield From(asyncio.create_subprocess_exec(
*args,
stdin=subprocess.PIPE,
stdout=subprocess.PIPE,
loop=self.loop))
# feed data
proc.stdin.write(data)
yield From(proc.stdin.drain())
proc.stdin.close()
# get output and exitcode
data = yield From(proc.stdout.read())
exitcode = yield From(proc.wait())
raise Return(exitcode, data)
task = run(b'some data')
task = asyncio.wait_for(task, 60.0, loop=self.loop)
exitcode, stdout = self.loop.run_until_complete(task)
self.assertEqual(exitcode, 0)
self.assertEqual(stdout, b'some data')
def test_communicate(self):
args = PROGRAM_CAT
@asyncio.coroutine
def run(data):
proc = yield From(asyncio.create_subprocess_exec(
*args,
stdin=subprocess.PIPE,
stdout=subprocess.PIPE,
loop=self.loop))
stdout, stderr = yield From(proc.communicate(data))
raise Return(proc.returncode, stdout)
task = run(b'some data')
task = asyncio.wait_for(task, 60.0, loop=self.loop)
exitcode, stdout = self.loop.run_until_complete(task)
self.assertEqual(exitcode, 0)
self.assertEqual(stdout, b'some data')
def test_shell(self):
create = asyncio.create_subprocess_shell('exit 7',
loop=self.loop)
proc = self.loop.run_until_complete(create)
exitcode = self.loop.run_until_complete(proc.wait())
self.assertEqual(exitcode, 7)
@test_utils.skipUnless(hasattr(os, 'setsid'), "need os.setsid()")
def test_start_new_session(self):
def start_new_session():
os.setsid()
# start the new process in a new session
create = asyncio.create_subprocess_shell('exit 8',
preexec_fn=start_new_session,
loop=self.loop)
proc = self.loop.run_until_complete(create)
exitcode = self.loop.run_until_complete(proc.wait())
self.assertEqual(exitcode, 8)
def test_kill(self):
args = PROGRAM_BLOCKED
create = asyncio.create_subprocess_exec(*args, loop=self.loop)
proc = self.loop.run_until_complete(create)
proc.kill()
returncode = self.loop.run_until_complete(proc.wait())
if sys.platform == 'win32':
self.assertIsInstance(returncode, int)
# expect 1 but sometimes get 0
else:
self.assertEqual(-signal.SIGKILL, returncode)
def test_terminate(self):
args = PROGRAM_BLOCKED
create = asyncio.create_subprocess_exec(*args, loop=self.loop)
proc = self.loop.run_until_complete(create)
proc.terminate()
returncode = self.loop.run_until_complete(proc.wait())
if sys.platform == 'win32':
self.assertIsInstance(returncode, int)
# expect 1 but sometimes get 0
else:
self.assertEqual(-signal.SIGTERM, returncode)
@test_utils.skipIf(sys.platform == 'win32', "Don't have SIGHUP")
def test_send_signal(self):
code = '; '.join((
'import sys, time',
'print("sleeping")',
'sys.stdout.flush()',
'time.sleep(3600)'))
args = [sys.executable, '-c', code]
create = asyncio.create_subprocess_exec(*args, loop=self.loop, stdout=subprocess.PIPE)
proc = self.loop.run_until_complete(create)
@asyncio.coroutine
def send_signal(proc):
# basic synchronization to wait until the program is sleeping
line = yield From(proc.stdout.readline())
self.assertEqual(line, b'sleeping\n')
proc.send_signal(signal.SIGHUP)
returncode = yield From(proc.wait())
raise Return(returncode)
returncode = self.loop.run_until_complete(send_signal(proc))
self.assertEqual(-signal.SIGHUP, returncode)
def prepare_broken_pipe_test(self):
# buffer large enough to feed the whole pipe buffer
large_data = b'x' * support.PIPE_MAX_SIZE
# the program ends before the stdin can be feeded
create = asyncio.create_subprocess_exec(
sys.executable, '-c', 'pass',
stdin=subprocess.PIPE,
loop=self.loop)
proc = self.loop.run_until_complete(create)
return (proc, large_data)
def test_stdin_broken_pipe(self):
proc, large_data = self.prepare_broken_pipe_test()
@asyncio.coroutine
def write_stdin(proc, data):
proc.stdin.write(data)
yield From(proc.stdin.drain())
coro = write_stdin(proc, large_data)
# drain() must raise BrokenPipeError or ConnectionResetError
with test_utils.disable_logger():
self.assertRaises((BrokenPipeError, ConnectionResetError),
self.loop.run_until_complete, coro)
self.loop.run_until_complete(proc.wait())
def test_communicate_ignore_broken_pipe(self):
proc, large_data = self.prepare_broken_pipe_test()
# communicate() must ignore BrokenPipeError when feeding stdin
with test_utils.disable_logger():
self.loop.run_until_complete(proc.communicate(large_data))
self.loop.run_until_complete(proc.wait())
if sys.platform != 'win32':
# Unix
class SubprocessWatcherMixin(SubprocessMixin):
Watcher = None
def setUp(self):
policy = asyncio.get_event_loop_policy()
self.loop = policy.new_event_loop()
# ensure that the event loop is passed explicitly in asyncio
policy.set_event_loop(None)
watcher = self.Watcher()
watcher.attach_loop(self.loop)
policy.set_child_watcher(watcher)
def tearDown(self):
policy = asyncio.get_event_loop_policy()
policy.set_child_watcher(None)
self.loop.close()
super(SubprocessWatcherMixin, self).tearDown()
class SubprocessSafeWatcherTests(SubprocessWatcherMixin,
test_utils.TestCase):
Watcher = unix_events.SafeChildWatcher
class SubprocessFastWatcherTests(SubprocessWatcherMixin,
test_utils.TestCase):
Watcher = unix_events.FastChildWatcher
else:
# Windows
class SubprocessProactorTests(SubprocessMixin, test_utils.TestCase):
def setUp(self):
policy = asyncio.get_event_loop_policy()
self.loop = asyncio.ProactorEventLoop()
# ensure that the event loop is passed explicitly in asyncio
policy.set_event_loop(None)
def tearDown(self):
policy = asyncio.get_event_loop_policy()
self.loop.close()
policy.set_event_loop(None)
super(SubprocessProactorTests, self).tearDown()
if __name__ == '__main__':
unittest.main()
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