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291 lines
9.9 KiB
Python
291 lines
9.9 KiB
Python
import errno
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import fcntl
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import os
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import signal
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import sys
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import time
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import unittest
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import mock
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import testlib
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import mitogen.core
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import mitogen.parent
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try:
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file
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except NameError:
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from io import FileIO as file
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def wait_for_child(pid, timeout=1.0):
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deadline = mitogen.core.now() + timeout
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while timeout < mitogen.core.now():
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try:
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target_pid, status = os.waitpid(pid, os.WNOHANG)
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if target_pid == pid:
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return
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except OSError:
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e = sys.exc_info()[1]
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if e.args[0] == errno.ECHILD:
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return
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time.sleep(0.05)
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assert False, "wait_for_child() timed out"
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@mitogen.core.takes_econtext
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def call_func_in_sibling(ctx, econtext, sync_sender):
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recv = ctx.call_async(time.sleep, 99999)
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sync_sender.send(None)
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recv.get().unpickle()
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def wait_for_empty_output_queue(sync_recv, context):
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# wait for sender to submit their RPC. Since the RPC is sent first, the
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# message sent to this sender cannot arrive until we've routed the RPC.
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sync_recv.get()
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router = context.router
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broker = router.broker
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while True:
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# Now wait for the RPC to exit the output queue.
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stream = router.stream_by_id(context.context_id)
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if broker.defer_sync(lambda: stream.protocol.pending_bytes()) == 0:
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return
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time.sleep(0.1)
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class GetDefaultRemoteNameTest(testlib.TestCase):
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func = staticmethod(mitogen.parent.get_default_remote_name)
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@mock.patch('os.getpid')
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@mock.patch('getpass.getuser')
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@mock.patch('socket.gethostname')
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def test_slashes(self, mock_gethostname, mock_getuser, mock_getpid):
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# Ensure slashes appearing in the remote name are replaced with
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# underscores.
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mock_gethostname.return_value = 'box'
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mock_getuser.return_value = 'ECORP\\Administrator'
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mock_getpid.return_value = 123
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self.assertEqual("ECORP_Administrator@box:123", self.func())
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class ReturncodeToStrTest(testlib.TestCase):
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func = staticmethod(mitogen.parent.returncode_to_str)
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def test_return_zero(self):
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self.assertEqual(self.func(0), 'exited with return code 0')
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def test_return_one(self):
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self.assertEqual(self.func(1), 'exited with return code 1')
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def test_sigkill(self):
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self.assertEqual(self.func(-signal.SIGKILL),
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'exited due to signal %s (SIGKILL)' % (int(signal.SIGKILL),)
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)
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# can't test SIGSTOP without POSIX sessions rabbithole
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class ReapChildTest(testlib.RouterMixin, testlib.TestCase):
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def test_connect_timeout(self):
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# Ensure the child process is reaped if the connection times out.
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options = mitogen.parent.Options(
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old_router=self.router,
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max_message_size=self.router.max_message_size,
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python_path=testlib.data_path('python_never_responds.py'),
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connect_timeout=0.5,
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)
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conn = mitogen.parent.Connection(options, router=self.router)
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self.assertRaises(mitogen.core.TimeoutError,
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lambda: conn.connect(context=mitogen.core.Context(None, 1234))
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)
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wait_for_child(conn.proc.pid)
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e = self.assertRaises(OSError,
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lambda: os.kill(conn.proc.pid, 0)
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)
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self.assertEqual(e.args[0], errno.ESRCH)
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class StreamErrorTest(testlib.RouterMixin, testlib.TestCase):
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def test_direct_eof(self):
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e = self.assertRaises(mitogen.core.StreamError,
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lambda: self.router.local(
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python_path='true',
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connect_timeout=3,
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)
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)
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prefix = mitogen.parent.Connection.eof_error_msg
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self.assertTrue(e.args[0].startswith(prefix))
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def test_via_eof(self):
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# Verify FD leakage does not keep failed process open.
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local = self.router.local()
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e = self.assertRaises(mitogen.core.StreamError,
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lambda: self.router.local(
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via=local,
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python_path='echo',
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connect_timeout=3,
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)
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)
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expect = mitogen.parent.Connection.eof_error_msg
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self.assertIn(expect, e.args[0])
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def test_direct_enoent(self):
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e = self.assertRaises(mitogen.core.StreamError,
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lambda: self.router.local(
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python_path='derp',
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connect_timeout=3,
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)
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)
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prefix = 'Child start failed: [Errno 2] No such file or directory'
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self.assertTrue(e.args[0].startswith(prefix))
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def test_via_enoent(self):
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local = self.router.local()
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e = self.assertRaises(mitogen.core.StreamError,
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lambda: self.router.local(
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via=local,
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python_path='derp',
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connect_timeout=3,
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)
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)
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s = 'Child start failed: [Errno 2] No such file or directory'
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self.assertIn(s, e.args[0])
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class ContextTest(testlib.RouterMixin, testlib.TestCase):
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def test_context_shutdown(self):
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local = self.router.local()
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pid = local.call(os.getpid)
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local.shutdown(wait=True)
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wait_for_child(pid)
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self.assertRaises(OSError, lambda: os.kill(pid, 0))
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class OpenPtyTest(testlib.TestCase):
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func = staticmethod(mitogen.parent.openpty)
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def test_pty_returned(self):
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master_fp, slave_fp = self.func()
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try:
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self.assertTrue(master_fp.isatty())
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self.assertIsInstance(master_fp, file)
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self.assertTrue(slave_fp.isatty())
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self.assertIsInstance(slave_fp, file)
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finally:
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master_fp.close()
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slave_fp.close()
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@mock.patch('os.openpty')
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def test_max_reached(self, openpty):
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openpty.side_effect = OSError(errno.ENXIO)
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e = self.assertRaises(mitogen.core.StreamError,
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lambda: self.func())
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msg = mitogen.parent.OPENPTY_MSG % (openpty.side_effect,)
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self.assertEqual(e.args[0], msg)
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@unittest.skipIf(condition=(os.uname()[0] != 'Linux'),
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reason='Fallback only supported on Linux')
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@mock.patch('os.openpty')
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def test_broken_linux_fallback(self, openpty):
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openpty.side_effect = OSError(errno.EPERM)
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master_fp, slave_fp = self.func()
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try:
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st = os.fstat(master_fp.fileno())
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self.assertEqual(5, os.major(st.st_rdev))
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flags = fcntl.fcntl(master_fp.fileno(), fcntl.F_GETFL)
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self.assertTrue(flags & os.O_RDWR)
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st = os.fstat(slave_fp.fileno())
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self.assertEqual(136, os.major(st.st_rdev))
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flags = fcntl.fcntl(slave_fp.fileno(), fcntl.F_GETFL)
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self.assertTrue(flags & os.O_RDWR)
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finally:
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master_fp.close()
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slave_fp.close()
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class DisconnectTest(testlib.RouterMixin, testlib.TestCase):
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def test_child_disconnected(self):
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# Easy mode: process notices its own directly connected child is
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# disconnected.
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c1 = self.router.local()
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recv = c1.call_async(time.sleep, 9999)
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c1.shutdown(wait=True)
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e = self.assertRaises(mitogen.core.ChannelError,
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lambda: recv.get())
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self.assertEqual(e.args[0], self.router.respondent_disconnect_msg)
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def test_indirect_child_disconnected(self):
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# Achievement unlocked: process notices an indirectly connected child
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# is disconnected.
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c1 = self.router.local()
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c2 = self.router.local(via=c1)
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recv = c2.call_async(time.sleep, 9999)
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c2.shutdown(wait=True)
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e = self.assertRaises(mitogen.core.ChannelError,
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lambda: recv.get())
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self.assertEqual(e.args[0], self.router.respondent_disconnect_msg)
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def test_indirect_child_intermediary_disconnected(self):
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# Battlefield promotion: process notices indirect child disconnected
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# due to an intermediary child disconnecting.
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c1 = self.router.local()
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c2 = self.router.local(via=c1)
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recv = c2.call_async(time.sleep, 9999)
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c1.shutdown(wait=True)
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e = self.assertRaises(mitogen.core.ChannelError,
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lambda: recv.get())
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self.assertEqual(e.args[0], self.router.respondent_disconnect_msg)
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def test_near_sibling_disconnected(self):
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# Hard mode: child notices sibling connected to same parent has
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# disconnected.
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c1 = self.router.local()
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c2 = self.router.local()
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# Let c1 call functions in c2.
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self.router.stream_by_id(c1.context_id).protocol.auth_id = mitogen.context_id
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c1.call(mitogen.parent.upgrade_router)
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sync_recv = mitogen.core.Receiver(self.router)
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recv = c1.call_async(call_func_in_sibling, c2,
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sync_sender=sync_recv.to_sender())
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wait_for_empty_output_queue(sync_recv, c2)
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c2.shutdown(wait=True)
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e = self.assertRaises(mitogen.core.CallError,
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lambda: recv.get().unpickle())
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s = 'mitogen.core.ChannelError: ' + self.router.respondent_disconnect_msg
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self.assertTrue(e.args[0].startswith(s), str(e))
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def test_far_sibling_disconnected(self):
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# God mode: child of child notices child of child of parent has
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# disconnected.
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c1 = self.router.local(name='c1')
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c11 = self.router.local(name='c11', via=c1)
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c2 = self.router.local(name='c2')
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c22 = self.router.local(name='c22', via=c2)
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# Let c1 call functions in c2.
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self.router.stream_by_id(c1.context_id).protocol.auth_id = mitogen.context_id
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c11.call(mitogen.parent.upgrade_router)
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sync_recv = mitogen.core.Receiver(self.router)
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recv = c11.call_async(call_func_in_sibling, c22,
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sync_sender=sync_recv.to_sender())
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wait_for_empty_output_queue(sync_recv, c22)
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c22.shutdown(wait=True)
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e = self.assertRaises(mitogen.core.CallError,
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lambda: recv.get().unpickle())
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s = 'mitogen.core.ChannelError: ' + self.router.respondent_disconnect_msg
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self.assertTrue(e.args[0].startswith(s))
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