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from asyncio import subprocess
import asyncio
import signal
import sys
import unittest
from test import support
if sys.platform != 'win32':
from asyncio import unix_events
# Program blocking
PROGRAM_BLOCKED = [sys.executable, '-c', 'import time; time.sleep(3600)']
# Program sleeping during 1 second
PROGRAM_SLEEP_1SEC = [sys.executable, '-c', 'import time; time.sleep(1)']
# Program copying input to output
PROGRAM_CAT = [
sys.executable, '-c',
';'.join(('import sys',
'data = sys.stdin.buffer.read()',
'sys.stdout.buffer.write(data)'))]
class SubprocessMixin:
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()
return (exitcode, data)
task = run(b'some data')
task = asyncio.wait_for(task, 10.0, 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)
return proc.returncode, stdout
task = run(b'some data')
task = asyncio.wait_for(task, 10.0, 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)
def test_start_new_session(self):
# start the new process in a new session
create = asyncio.create_subprocess_shell('exit 8',
start_new_session=True,
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)
@unittest.skipIf(sys.platform == 'win32', "Don't have SIGHUP")
def test_send_signal(self):
args = PROGRAM_BLOCKED
create = asyncio.create_subprocess_exec(*args, loop=self.loop)
proc = self.loop.run_until_complete(create)
proc.send_signal(signal.SIGHUP)
returncode = self.loop.run_until_complete(proc.wait())
self.assertEqual(-signal.SIGHUP, returncode)
def test_broken_pipe(self):
large_data = b'x' * support.PIPE_MAX_SIZE
create = asyncio.create_subprocess_exec(
*PROGRAM_SLEEP_1SEC,
stdin=subprocess.PIPE,
loop=self.loop)
proc = self.loop.run_until_complete(create)
with self.assertRaises(BrokenPipeError):
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 the code
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()
policy.set_event_loop(None)
class SubprocessSafeWatcherTests(SubprocessWatcherMixin,
unittest.TestCase):
Watcher = unix_events.SafeChildWatcher
class SubprocessFastWatcherTests(SubprocessWatcherMixin,
unittest.TestCase):
Watcher = unix_events.FastChildWatcher
else:
# Windows
class SubprocessProactorTests(SubprocessMixin, unittest.TestCase):
def setUp(self):
policy = asyncio.get_event_loop_policy()
self.loop = asyncio.ProactorEventLoop()
# ensure that the event loop is passed explicitly in the code
policy.set_event_loop(None)
def tearDown(self):
policy = asyncio.get_event_loop_policy()
self.loop.close()
policy.set_event_loop(None)
if __name__ == '__main__':
unittest.main()
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