/usr/lib/python2.7/dist-packages/tornado/test/process_test.py is in python-tornado 3.1.1-1ubuntu2.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 | #!/usr/bin/env python
from __future__ import absolute_import, division, print_function, with_statement
import logging
import os
import signal
import subprocess
import sys
from tornado.httpclient import HTTPClient, HTTPError
from tornado.httpserver import HTTPServer
from tornado.ioloop import IOLoop
from tornado.log import gen_log
from tornado.process import fork_processes, task_id, Subprocess
from tornado.simple_httpclient import SimpleAsyncHTTPClient
from tornado.testing import bind_unused_port, ExpectLog, AsyncTestCase
from tornado.test.util import unittest, skipIfNonUnix
from tornado.web import RequestHandler, Application
def skip_if_twisted():
if IOLoop.configured_class().__name__.endswith('TwistedIOLoop'):
raise unittest.SkipTest("Process tests not compatible with TwistedIOLoop")
# Not using AsyncHTTPTestCase because we need control over the IOLoop.
@skipIfNonUnix
class ProcessTest(unittest.TestCase):
def get_app(self):
class ProcessHandler(RequestHandler):
def get(self):
if self.get_argument("exit", None):
# must use os._exit instead of sys.exit so unittest's
# exception handler doesn't catch it
os._exit(int(self.get_argument("exit")))
if self.get_argument("signal", None):
os.kill(os.getpid(),
int(self.get_argument("signal")))
self.write(str(os.getpid()))
return Application([("/", ProcessHandler)])
def tearDown(self):
if task_id() is not None:
# We're in a child process, and probably got to this point
# via an uncaught exception. If we return now, both
# processes will continue with the rest of the test suite.
# Exit now so the parent process will restart the child
# (since we don't have a clean way to signal failure to
# the parent that won't restart)
logging.error("aborting child process from tearDown")
logging.shutdown()
os._exit(1)
# In the surviving process, clear the alarm we set earlier
signal.alarm(0)
super(ProcessTest, self).tearDown()
def test_multi_process(self):
# This test can't work on twisted because we use the global reactor
# and have no way to get it back into a sane state after the fork.
skip_if_twisted()
with ExpectLog(gen_log, "(Starting .* processes|child .* exited|uncaught exception)"):
self.assertFalse(IOLoop.initialized())
sock, port = bind_unused_port()
def get_url(path):
return "http://127.0.0.1:%d%s" % (port, path)
# ensure that none of these processes live too long
signal.alarm(5) # master process
try:
id = fork_processes(3, max_restarts=3)
self.assertTrue(id is not None)
signal.alarm(5) # child processes
except SystemExit as e:
# if we exit cleanly from fork_processes, all the child processes
# finished with status 0
self.assertEqual(e.code, 0)
self.assertTrue(task_id() is None)
sock.close()
return
try:
if id in (0, 1):
self.assertEqual(id, task_id())
server = HTTPServer(self.get_app())
server.add_sockets([sock])
IOLoop.instance().start()
elif id == 2:
self.assertEqual(id, task_id())
sock.close()
# Always use SimpleAsyncHTTPClient here; the curl
# version appears to get confused sometimes if the
# connection gets closed before it's had a chance to
# switch from writing mode to reading mode.
client = HTTPClient(SimpleAsyncHTTPClient)
def fetch(url, fail_ok=False):
try:
return client.fetch(get_url(url))
except HTTPError as e:
if not (fail_ok and e.code == 599):
raise
# Make two processes exit abnormally
fetch("/?exit=2", fail_ok=True)
fetch("/?exit=3", fail_ok=True)
# They've been restarted, so a new fetch will work
int(fetch("/").body)
# Now the same with signals
# Disabled because on the mac a process dying with a signal
# can trigger an "Application exited abnormally; send error
# report to Apple?" prompt.
# fetch("/?signal=%d" % signal.SIGTERM, fail_ok=True)
# fetch("/?signal=%d" % signal.SIGABRT, fail_ok=True)
# int(fetch("/").body)
# Now kill them normally so they won't be restarted
fetch("/?exit=0", fail_ok=True)
# One process left; watch it's pid change
pid = int(fetch("/").body)
fetch("/?exit=4", fail_ok=True)
pid2 = int(fetch("/").body)
self.assertNotEqual(pid, pid2)
# Kill the last one so we shut down cleanly
fetch("/?exit=0", fail_ok=True)
os._exit(0)
except Exception:
logging.error("exception in child process %d", id, exc_info=True)
raise
@skipIfNonUnix
class SubprocessTest(AsyncTestCase):
def test_subprocess(self):
subproc = Subprocess([sys.executable, '-u', '-i'],
stdin=Subprocess.STREAM,
stdout=Subprocess.STREAM, stderr=subprocess.STDOUT,
io_loop=self.io_loop)
self.addCleanup(lambda: os.kill(subproc.pid, signal.SIGTERM))
subproc.stdout.read_until(b'>>> ', self.stop)
self.wait()
subproc.stdin.write(b"print('hello')\n")
subproc.stdout.read_until(b'\n', self.stop)
data = self.wait()
self.assertEqual(data, b"hello\n")
subproc.stdout.read_until(b">>> ", self.stop)
self.wait()
subproc.stdin.write(b"raise SystemExit\n")
subproc.stdout.read_until_close(self.stop)
data = self.wait()
self.assertEqual(data, b"")
def test_close_stdin(self):
# Close the parent's stdin handle and see that the child recognizes it.
subproc = Subprocess([sys.executable, '-u', '-i'],
stdin=Subprocess.STREAM,
stdout=Subprocess.STREAM, stderr=subprocess.STDOUT,
io_loop=self.io_loop)
self.addCleanup(lambda: os.kill(subproc.pid, signal.SIGTERM))
subproc.stdout.read_until(b'>>> ', self.stop)
self.wait()
subproc.stdin.close()
subproc.stdout.read_until_close(self.stop)
data = self.wait()
self.assertEqual(data, b"\n")
def test_stderr(self):
subproc = Subprocess([sys.executable, '-u', '-c',
r"import sys; sys.stderr.write('hello\n')"],
stderr=Subprocess.STREAM,
io_loop=self.io_loop)
self.addCleanup(lambda: os.kill(subproc.pid, signal.SIGTERM))
subproc.stderr.read_until(b'\n', self.stop)
data = self.wait()
self.assertEqual(data, b'hello\n')
def test_sigchild(self):
# Twisted's SIGCHLD handler and Subprocess's conflict with each other.
skip_if_twisted()
Subprocess.initialize(io_loop=self.io_loop)
self.addCleanup(Subprocess.uninitialize)
subproc = Subprocess([sys.executable, '-c', 'pass'],
io_loop=self.io_loop)
subproc.set_exit_callback(self.stop)
ret = self.wait()
self.assertEqual(ret, 0)
self.assertEqual(subproc.returncode, ret)
def test_sigchild_signal(self):
skip_if_twisted()
Subprocess.initialize(io_loop=self.io_loop)
self.addCleanup(Subprocess.uninitialize)
subproc = Subprocess([sys.executable, '-c',
'import time; time.sleep(30)'],
io_loop=self.io_loop)
subproc.set_exit_callback(self.stop)
os.kill(subproc.pid, signal.SIGTERM)
ret = self.wait()
self.assertEqual(subproc.returncode, ret)
self.assertEqual(ret, -signal.SIGTERM)
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