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test__interpchannels.py
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from collections import namedtuple
import contextlib
import sys
from textwrap import dedent
import threading
import time
import unittest
from test.support import import_helper, skip_if_sanitizer
_channels = import_helper.import_module('_interpchannels')
from test.support.interpreters import _crossinterp
from test.test__interpreters import (
_interpreters,
_run_output,
clean_up_interpreters,
)
REPLACE = _crossinterp._UNBOUND_CONSTANT_TO_FLAG[_crossinterp.UNBOUND]
# Additional tests are found in Lib/test/test_interpreters/test_channels.py.
# New tests should be added there.
# XXX The tests here should be moved there. See the note under LowLevelTests.
##################################
# helpers
def recv_wait(cid):
while True:
try:
obj, unboundop = _channels.recv(cid)
except _channels.ChannelEmptyError:
time.sleep(0.1)
else:
assert unboundop is None, repr(unboundop)
return obj
def recv_nowait(cid, *args, unbound=False):
obj, unboundop = _channels.recv(cid, *args)
assert (unboundop is None) != unbound, repr(unboundop)
return obj
#@contextmanager
#def run_threaded(id, source, **shared):
# def run():
# run_interp(id, source, **shared)
# t = threading.Thread(target=run)
# t.start()
# yield
# t.join()
def run_interp(id, source, **shared):
_run_interp(id, source, shared)
def _run_interp(id, source, shared, _mainns={}):
source = dedent(source)
main, *_ = _interpreters.get_main()
if main == id:
cur, *_ = _interpreters.get_current()
if cur != main:
raise RuntimeError
# XXX Run a func?
exec(source, _mainns)
else:
_interpreters.run_string(id, source, shared)
class Interpreter(namedtuple('Interpreter', 'name id')):
@classmethod
def from_raw(cls, raw):
if isinstance(raw, cls):
return raw
elif isinstance(raw, str):
return cls(raw)
else:
raise NotImplementedError
def __new__(cls, name=None, id=None):
main, *_ = _interpreters.get_main()
if id == main:
if not name:
name = 'main'
elif name != 'main':
raise ValueError(
'name mismatch (expected "main", got "{}")'.format(name))
id = main
elif id is not None:
if not name:
name = 'interp'
elif name == 'main':
raise ValueError('name mismatch (unexpected "main")')
assert isinstance(id, int), repr(id)
elif not name or name == 'main':
name = 'main'
id = main
else:
id = _interpreters.create()
self = super().__new__(cls, name, id)
return self
# XXX expect_channel_closed() is unnecessary once we improve exc propagation.
@contextlib.contextmanager
def expect_channel_closed():
try:
yield
except _channels.ChannelClosedError:
pass
else:
assert False, 'channel not closed'
class ChannelAction(namedtuple('ChannelAction', 'action end interp')):
def __new__(cls, action, end=None, interp=None):
if not end:
end = 'both'
if not interp:
interp = 'main'
self = super().__new__(cls, action, end, interp)
return self
def __init__(self, *args, **kwargs):
if self.action == 'use':
if self.end not in ('same', 'opposite', 'send', 'recv'):
raise ValueError(self.end)
elif self.action in ('close', 'force-close'):
if self.end not in ('both', 'same', 'opposite', 'send', 'recv'):
raise ValueError(self.end)
else:
raise ValueError(self.action)
if self.interp not in ('main', 'same', 'other', 'extra'):
raise ValueError(self.interp)
def resolve_end(self, end):
if self.end == 'same':
return end
elif self.end == 'opposite':
return 'recv' if end == 'send' else 'send'
else:
return self.end
def resolve_interp(self, interp, other, extra):
if self.interp == 'same':
return interp
elif self.interp == 'other':
if other is None:
raise RuntimeError
return other
elif self.interp == 'extra':
if extra is None:
raise RuntimeError
return extra
elif self.interp == 'main':
if interp.name == 'main':
return interp
elif other and other.name == 'main':
return other
else:
raise RuntimeError
# Per __init__(), there aren't any others.
class ChannelState(namedtuple('ChannelState', 'pending closed')):
def __new__(cls, pending=0, *, closed=False):
self = super().__new__(cls, pending, closed)
return self
def incr(self):
return type(self)(self.pending + 1, closed=self.closed)
def decr(self):
return type(self)(self.pending - 1, closed=self.closed)
def close(self, *, force=True):
if self.closed:
if not force or self.pending == 0:
return self
return type(self)(0 if force else self.pending, closed=True)
def run_action(cid, action, end, state, *, hideclosed=True):
if state.closed:
if action == 'use' and end == 'recv' and state.pending:
expectfail = False
else:
expectfail = True
else:
expectfail = False
try:
result = _run_action(cid, action, end, state)
except _channels.ChannelClosedError:
if not hideclosed and not expectfail:
raise
result = state.close()
else:
if expectfail:
raise ... # XXX
return result
def _run_action(cid, action, end, state):
if action == 'use':
if end == 'send':
_channels.send(cid, b'spam', blocking=False)
return state.incr()
elif end == 'recv':
if not state.pending:
try:
_channels.recv(cid)
except _channels.ChannelEmptyError:
return state
else:
raise Exception('expected ChannelEmptyError')
else:
recv_nowait(cid)
return state.decr()
else:
raise ValueError(end)
elif action == 'close':
kwargs = {}
if end in ('recv', 'send'):
kwargs[end] = True
_channels.close(cid, **kwargs)
return state.close()
elif action == 'force-close':
kwargs = {
'force': True,
}
if end in ('recv', 'send'):
kwargs[end] = True
_channels.close(cid, **kwargs)
return state.close(force=True)
else:
raise ValueError(action)
def clean_up_channels():
for cid, _ in _channels.list_all():
try:
_channels.destroy(cid)
except _channels.ChannelNotFoundError:
pass # already destroyed
class TestBase(unittest.TestCase):
def tearDown(self):
clean_up_channels()
clean_up_interpreters()
##################################
# channel tests
class ChannelIDTests(TestBase):
def test_default_kwargs(self):
cid = _channels._channel_id(10, force=True)
self.assertEqual(int(cid), 10)
self.assertEqual(cid.end, 'both')
def test_with_kwargs(self):
cid = _channels._channel_id(10, send=True, force=True)
self.assertEqual(cid.end, 'send')
cid = _channels._channel_id(10, send=True, recv=False, force=True)
self.assertEqual(cid.end, 'send')
cid = _channels._channel_id(10, recv=True, force=True)
self.assertEqual(cid.end, 'recv')
cid = _channels._channel_id(10, recv=True, send=False, force=True)
self.assertEqual(cid.end, 'recv')
cid = _channels._channel_id(10, send=True, recv=True, force=True)
self.assertEqual(cid.end, 'both')
def test_coerce_id(self):
class Int(str):
def __index__(self):
return 10
cid = _channels._channel_id(Int(), force=True)
self.assertEqual(int(cid), 10)
def test_bad_id(self):
self.assertRaises(TypeError, _channels._channel_id, object())
self.assertRaises(TypeError, _channels._channel_id, 10.0)
self.assertRaises(TypeError, _channels._channel_id, '10')
self.assertRaises(TypeError, _channels._channel_id, b'10')
self.assertRaises(ValueError, _channels._channel_id, -1)
self.assertRaises(OverflowError, _channels._channel_id, 2**64)
def test_bad_kwargs(self):
with self.assertRaises(ValueError):
_channels._channel_id(10, send=False, recv=False)
def test_does_not_exist(self):
cid = _channels.create(REPLACE)
with self.assertRaises(_channels.ChannelNotFoundError):
_channels._channel_id(int(cid) + 1) # unforced
def test_str(self):
cid = _channels._channel_id(10, force=True)
self.assertEqual(str(cid), '10')
def test_repr(self):
cid = _channels._channel_id(10, force=True)
self.assertEqual(repr(cid), 'ChannelID(10)')
cid = _channels._channel_id(10, send=True, force=True)
self.assertEqual(repr(cid), 'ChannelID(10, send=True)')
cid = _channels._channel_id(10, recv=True, force=True)
self.assertEqual(repr(cid), 'ChannelID(10, recv=True)')
cid = _channels._channel_id(10, send=True, recv=True, force=True)
self.assertEqual(repr(cid), 'ChannelID(10)')
def test_equality(self):
cid1 = _channels.create(REPLACE)
cid2 = _channels._channel_id(int(cid1))
cid3 = _channels.create(REPLACE)
self.assertTrue(cid1 == cid1)
self.assertTrue(cid1 == cid2)
self.assertTrue(cid1 == int(cid1))
self.assertTrue(int(cid1) == cid1)
self.assertTrue(cid1 == float(int(cid1)))
self.assertTrue(float(int(cid1)) == cid1)
self.assertFalse(cid1 == float(int(cid1)) + 0.1)
self.assertFalse(cid1 == str(int(cid1)))
self.assertFalse(cid1 == 2**1000)
self.assertFalse(cid1 == float('inf'))
self.assertFalse(cid1 == 'spam')
self.assertFalse(cid1 == cid3)
self.assertFalse(cid1 != cid1)
self.assertFalse(cid1 != cid2)
self.assertTrue(cid1 != cid3)
def test_shareable(self):
chan = _channels.create(REPLACE)
obj = _channels.create(REPLACE)
_channels.send(chan, obj, blocking=False)
got = recv_nowait(chan)
self.assertEqual(got, obj)
self.assertIs(type(got), type(obj))
# XXX Check the following in the channel tests?
#self.assertIsNot(got, obj)
@skip_if_sanitizer('gh-129824: race on _waiting_release', thread=True)
class ChannelTests(TestBase):
def test_create_cid(self):
cid = _channels.create(REPLACE)
self.assertIsInstance(cid, _channels.ChannelID)
def test_sequential_ids(self):
before = [cid for cid, _ in _channels.list_all()]
id1 = _channels.create(REPLACE)
id2 = _channels.create(REPLACE)
id3 = _channels.create(REPLACE)
after = [cid for cid, _ in _channels.list_all()]
self.assertEqual(id2, int(id1) + 1)
self.assertEqual(id3, int(id2) + 1)
self.assertEqual(set(after) - set(before), {id1, id2, id3})
def test_ids_global(self):
id1 = _interpreters.create()
out = _run_output(id1, dedent("""
import _interpchannels as _channels
cid = _channels.create(3)
print(cid)
"""))
cid1 = int(out.strip())
id2 = _interpreters.create()
out = _run_output(id2, dedent("""
import _interpchannels as _channels
cid = _channels.create(3)
print(cid)
"""))
cid2 = int(out.strip())
self.assertEqual(cid2, int(cid1) + 1)
def test_channel_list_interpreters_none(self):
"""Test listing interpreters for a channel with no associations."""
# Test for channel with no associated _interpreters.
cid = _channels.create(REPLACE)
send_interps = _channels.list_interpreters(cid, send=True)
recv_interps = _channels.list_interpreters(cid, send=False)
self.assertEqual(send_interps, [])
self.assertEqual(recv_interps, [])
def test_channel_list_interpreters_basic(self):
"""Test basic listing channel _interpreters."""
interp0, *_ = _interpreters.get_main()
cid = _channels.create(REPLACE)
_channels.send(cid, "send", blocking=False)
# Test for a channel that has one end associated to an interpreter.
send_interps = _channels.list_interpreters(cid, send=True)
recv_interps = _channels.list_interpreters(cid, send=False)
self.assertEqual(send_interps, [interp0])
self.assertEqual(recv_interps, [])
interp1 = _interpreters.create()
_run_output(interp1, dedent(f"""
import _interpchannels as _channels
_channels.recv({cid})
"""))
# Test for channel that has both ends associated to an interpreter.
send_interps = _channels.list_interpreters(cid, send=True)
recv_interps = _channels.list_interpreters(cid, send=False)
self.assertEqual(send_interps, [interp0])
self.assertEqual(recv_interps, [interp1])
def test_channel_list_interpreters_multiple(self):
"""Test listing interpreters for a channel with many associations."""
interp0, *_ = _interpreters.get_main()
interp1 = _interpreters.create()
interp2 = _interpreters.create()
interp3 = _interpreters.create()
cid = _channels.create(REPLACE)
_channels.send(cid, "send", blocking=False)
_run_output(interp1, dedent(f"""
import _interpchannels as _channels
_channels.send({cid}, "send", blocking=False)
"""))
_run_output(interp2, dedent(f"""
import _interpchannels as _channels
_channels.recv({cid})
"""))
_run_output(interp3, dedent(f"""
import _interpchannels as _channels
_channels.recv({cid})
"""))
send_interps = _channels.list_interpreters(cid, send=True)
recv_interps = _channels.list_interpreters(cid, send=False)
self.assertEqual(set(send_interps), {interp0, interp1})
self.assertEqual(set(recv_interps), {interp2, interp3})
def test_channel_list_interpreters_destroyed(self):
"""Test listing channel interpreters with a destroyed interpreter."""
interp0, *_ = _interpreters.get_main()
interp1 = _interpreters.create()
cid = _channels.create(REPLACE)
_channels.send(cid, "send", blocking=False)
_run_output(interp1, dedent(f"""
import _interpchannels as _channels
_channels.recv({cid})
"""))
# Should be one interpreter associated with each end.
send_interps = _channels.list_interpreters(cid, send=True)
recv_interps = _channels.list_interpreters(cid, send=False)
self.assertEqual(send_interps, [interp0])
self.assertEqual(recv_interps, [interp1])
_interpreters.destroy(interp1)
# Destroyed interpreter should not be listed.
send_interps = _channels.list_interpreters(cid, send=True)
recv_interps = _channels.list_interpreters(cid, send=False)
self.assertEqual(send_interps, [interp0])
self.assertEqual(recv_interps, [])
def test_channel_list_interpreters_released(self):
"""Test listing channel interpreters with a released channel."""
# Set up one channel with main interpreter on the send end and two
# subinterpreters on the receive end.
interp0, *_ = _interpreters.get_main()
interp1 = _interpreters.create()
interp2 = _interpreters.create()
cid = _channels.create(REPLACE)
_channels.send(cid, "data", blocking=False)
_run_output(interp1, dedent(f"""
import _interpchannels as _channels
_channels.recv({cid})
"""))
_channels.send(cid, "data", blocking=False)
_run_output(interp2, dedent(f"""
import _interpchannels as _channels
_channels.recv({cid})
"""))
# Check the setup.
send_interps = _channels.list_interpreters(cid, send=True)
recv_interps = _channels.list_interpreters(cid, send=False)
self.assertEqual(len(send_interps), 1)
self.assertEqual(len(recv_interps), 2)
# Release the main interpreter from the send end.
_channels.release(cid, send=True)
# Send end should have no associated _interpreters.
send_interps = _channels.list_interpreters(cid, send=True)
recv_interps = _channels.list_interpreters(cid, send=False)
self.assertEqual(len(send_interps), 0)
self.assertEqual(len(recv_interps), 2)
# Release one of the subinterpreters from the receive end.
_run_output(interp2, dedent(f"""
import _interpchannels as _channels
_channels.release({cid})
"""))
# Receive end should have the released interpreter removed.
send_interps = _channels.list_interpreters(cid, send=True)
recv_interps = _channels.list_interpreters(cid, send=False)
self.assertEqual(len(send_interps), 0)
self.assertEqual(recv_interps, [interp1])
def test_channel_list_interpreters_closed(self):
"""Test listing channel interpreters with a closed channel."""
interp0, *_ = _interpreters.get_main()
interp1 = _interpreters.create()
cid = _channels.create(REPLACE)
# Put something in the channel so that it's not empty.
_channels.send(cid, "send", blocking=False)
# Check initial state.
send_interps = _channels.list_interpreters(cid, send=True)
recv_interps = _channels.list_interpreters(cid, send=False)
self.assertEqual(len(send_interps), 1)
self.assertEqual(len(recv_interps), 0)
# Force close the channel.
_channels.close(cid, force=True)
# Both ends should raise an error.
with self.assertRaises(_channels.ChannelClosedError):
_channels.list_interpreters(cid, send=True)
with self.assertRaises(_channels.ChannelClosedError):
_channels.list_interpreters(cid, send=False)
def test_channel_list_interpreters_closed_send_end(self):
"""Test listing channel interpreters with a channel's send end closed."""
interp0, *_ = _interpreters.get_main()
interp1 = _interpreters.create()
cid = _channels.create(REPLACE)
# Put something in the channel so that it's not empty.
_channels.send(cid, "send", blocking=False)
# Check initial state.
send_interps = _channels.list_interpreters(cid, send=True)
recv_interps = _channels.list_interpreters(cid, send=False)
self.assertEqual(len(send_interps), 1)
self.assertEqual(len(recv_interps), 0)
# Close the send end of the channel.
_channels.close(cid, send=True)
# Send end should raise an error.
with self.assertRaises(_channels.ChannelClosedError):
_channels.list_interpreters(cid, send=True)
# Receive end should not be closed (since channel is not empty).
recv_interps = _channels.list_interpreters(cid, send=False)
self.assertEqual(len(recv_interps), 0)
# Close the receive end of the channel from a subinterpreter.
_run_output(interp1, dedent(f"""
import _interpchannels as _channels
_channels.close({cid}, force=True)
"""))
return
# Both ends should raise an error.
with self.assertRaises(_channels.ChannelClosedError):
_channels.list_interpreters(cid, send=True)
with self.assertRaises(_channels.ChannelClosedError):
_channels.list_interpreters(cid, send=False)
def test_allowed_types(self):
cid = _channels.create(REPLACE)
objects = [
None,
'spam',
b'spam',
42,
]
for obj in objects:
with self.subTest(obj):
_channels.send(cid, obj, blocking=False)
got = recv_nowait(cid)
self.assertEqual(got, obj)
self.assertIs(type(got), type(obj))
# XXX Check the following?
#self.assertIsNot(got, obj)
# XXX What about between interpreters?
def test_run_string_arg_unresolved(self):
cid = _channels.create(REPLACE)
interp = _interpreters.create()
_interpreters.set___main___attrs(interp, dict(cid=cid.send))
out = _run_output(interp, dedent("""
import _interpchannels as _channels
print(cid.end)
_channels.send(cid, b'spam', blocking=False)
"""))
obj = recv_nowait(cid)
self.assertEqual(obj, b'spam')
self.assertEqual(out.strip(), 'send')
# XXX For now there is no high-level channel into which the
# sent channel ID can be converted...
# Note: this test caused crashes on some buildbots (bpo-33615).
@unittest.skip('disabled until high-level channels exist')
def test_run_string_arg_resolved(self):
cid = _channels.create(REPLACE)
cid = _channels._channel_id(cid, _resolve=True)
interp = _interpreters.create()
out = _run_output(interp, dedent("""
import _interpchannels as _channels
print(chan.id.end)
_channels.send(chan.id, b'spam', blocking=False)
"""),
dict(chan=cid.send))
obj = recv_nowait(cid)
self.assertEqual(obj, b'spam')
self.assertEqual(out.strip(), 'send')
#-------------------
# send/recv
def test_send_recv_main(self):
cid = _channels.create(REPLACE)
orig = b'spam'
_channels.send(cid, orig, blocking=False)
obj = recv_nowait(cid)
self.assertEqual(obj, orig)
self.assertIsNot(obj, orig)
def test_send_recv_same_interpreter(self):
id1 = _interpreters.create()
out = _run_output(id1, dedent("""
import _interpchannels as _channels
cid = _channels.create(REPLACE)
orig = b'spam'
_channels.send(cid, orig, blocking=False)
obj, _ = _channels.recv(cid)
assert obj is not orig
assert obj == orig
"""))
def test_send_recv_different_interpreters(self):
cid = _channels.create(REPLACE)
id1 = _interpreters.create()
out = _run_output(id1, dedent(f"""
import _interpchannels as _channels
_channels.send({cid}, b'spam', blocking=False)
"""))
obj = recv_nowait(cid)
self.assertEqual(obj, b'spam')
def test_send_recv_different_threads(self):
cid = _channels.create(REPLACE)
def f():
obj = recv_wait(cid)
_channels.send(cid, obj)
t = threading.Thread(target=f)
t.start()
_channels.send(cid, b'spam')
obj = recv_wait(cid)
t.join()
self.assertEqual(obj, b'spam')
def test_send_recv_different_interpreters_and_threads(self):
cid = _channels.create(REPLACE)
id1 = _interpreters.create()
out = None
def f():
nonlocal out
out = _run_output(id1, dedent(f"""
import time
import _interpchannels as _channels
while True:
try:
obj, _ = _channels.recv({cid})
break
except _channels.ChannelEmptyError:
time.sleep(0.1)
assert(obj == b'spam')
_channels.send({cid}, b'eggs')
"""))
t = threading.Thread(target=f)
t.start()
_channels.send(cid, b'spam')
obj = recv_wait(cid)
t.join()
self.assertEqual(obj, b'eggs')
def test_send_not_found(self):
with self.assertRaises(_channels.ChannelNotFoundError):
_channels.send(10, b'spam')
def test_recv_not_found(self):
with self.assertRaises(_channels.ChannelNotFoundError):
_channels.recv(10)
def test_recv_empty(self):
cid = _channels.create(REPLACE)
with self.assertRaises(_channels.ChannelEmptyError):
_channels.recv(cid)
def test_recv_default(self):
default = object()
cid = _channels.create(REPLACE)
obj1 = recv_nowait(cid, default)
_channels.send(cid, None, blocking=False)
_channels.send(cid, 1, blocking=False)
_channels.send(cid, b'spam', blocking=False)
_channels.send(cid, b'eggs', blocking=False)
obj2 = recv_nowait(cid, default)
obj3 = recv_nowait(cid, default)
obj4 = recv_nowait(cid)
obj5 = recv_nowait(cid, default)
obj6 = recv_nowait(cid, default)
self.assertIs(obj1, default)
self.assertIs(obj2, None)
self.assertEqual(obj3, 1)
self.assertEqual(obj4, b'spam')
self.assertEqual(obj5, b'eggs')
self.assertIs(obj6, default)
def test_recv_sending_interp_destroyed(self):
with self.subTest('closed'):
cid1 = _channels.create(REPLACE)
interp = _interpreters.create()
_interpreters.run_string(interp, dedent(f"""
import _interpchannels as _channels
_channels.send({cid1}, b'spam', blocking=False)
"""))
_interpreters.destroy(interp)
with self.assertRaisesRegex(RuntimeError,
f'channel {cid1} is closed'):
_channels.recv(cid1)
del cid1
with self.subTest('still open'):
cid2 = _channels.create(REPLACE)
interp = _interpreters.create()
_interpreters.run_string(interp, dedent(f"""
import _interpchannels as _channels
_channels.send({cid2}, b'spam', blocking=False)
"""))
_channels.send(cid2, b'eggs', blocking=False)
_interpreters.destroy(interp)
recv_nowait(cid2, unbound=True)
recv_nowait(cid2, unbound=False)
with self.assertRaisesRegex(RuntimeError,
f'channel {cid2} is empty'):
_channels.recv(cid2)
del cid2
#-------------------
# send_buffer
def test_send_buffer(self):
buf = bytearray(b'spamspamspam')
cid = _channels.create(REPLACE)
_channels.send_buffer(cid, buf, blocking=False)
obj = recv_nowait(cid)
self.assertIsNot(obj, buf)
self.assertIsInstance(obj, memoryview)
self.assertEqual(obj, buf)
buf[4:8] = b'eggs'
self.assertEqual(obj, buf)
obj[4:8] = b'ham.'
self.assertEqual(obj, buf)
#-------------------
# send with waiting
def build_send_waiter(self, obj, *, buffer=False):
# We want a long enough sleep that send() actually has to wait.
if buffer:
send = _channels.send_buffer
else:
send = _channels.send
cid = _channels.create(REPLACE)
try:
started = time.monotonic()
send(cid, obj, blocking=False)
stopped = time.monotonic()
recv_nowait(cid)
finally:
_channels.destroy(cid)
delay = stopped - started # seconds
delay *= 3
def wait():
time.sleep(delay)
return wait
def test_send_blocking_waiting(self):
received = None
obj = b'spam'
wait = self.build_send_waiter(obj)
cid = _channels.create(REPLACE)
def f():
nonlocal received
wait()
received = recv_wait(cid)
t = threading.Thread(target=f)
t.start()
_channels.send(cid, obj, blocking=True)
t.join()
self.assertEqual(received, obj)
def test_send_buffer_blocking_waiting(self):
received = None
obj = bytearray(b'spam')
wait = self.build_send_waiter(obj, buffer=True)
cid = _channels.create(REPLACE)
def f():
nonlocal received
wait()
received = recv_wait(cid)
t = threading.Thread(target=f)
t.start()
_channels.send_buffer(cid, obj, blocking=True)
t.join()
self.assertEqual(received, obj)
def test_send_blocking_no_wait(self):
received = None
obj = b'spam'
cid = _channels.create(REPLACE)
def f():
nonlocal received
received = recv_wait(cid)
t = threading.Thread(target=f)
t.start()
_channels.send(cid, obj, blocking=True)
t.join()
self.assertEqual(received, obj)
def test_send_buffer_blocking_no_wait(self):
received = None
obj = bytearray(b'spam')
cid = _channels.create(REPLACE)
def f():
nonlocal received
received = recv_wait(cid)
t = threading.Thread(target=f)
t.start()
_channels.send_buffer(cid, obj, blocking=True)
t.join()
self.assertEqual(received, obj)
def test_send_timeout(self):
obj = b'spam'
with self.subTest('non-blocking with timeout'):
cid = _channels.create(REPLACE)
with self.assertRaises(ValueError):
_channels.send(cid, obj, blocking=False, timeout=0.1)
with self.subTest('timeout hit'):
cid = _channels.create(REPLACE)
with self.assertRaises(TimeoutError):
_channels.send(cid, obj, blocking=True, timeout=0.1)
with self.assertRaises(_channels.ChannelEmptyError):
received = recv_nowait(cid)
print(repr(received))
with self.subTest('timeout not hit'):
cid = _channels.create(REPLACE)
def f():
recv_wait(cid)
t = threading.Thread(target=f)
t.start()
_channels.send(cid, obj, blocking=True, timeout=10)
t.join()
def test_send_buffer_timeout(self):
try:
self._has_run_once_timeout
except AttributeError:
# At the moment, this test leaks a few references.
# It looks like the leak originates with the addition
# of _channels.send_buffer() (gh-110246), whereas the
# tests were added afterward. We want this test even
# if the refleak isn't fixed yet, so we skip here.
raise unittest.SkipTest('temporarily skipped due to refleaks')
else:
self._has_run_once_timeout = True
obj = bytearray(b'spam')
with self.subTest('non-blocking with timeout'):
cid = _channels.create(REPLACE)
with self.assertRaises(ValueError):
_channels.send_buffer(cid, obj, blocking=False, timeout=0.1)
with self.subTest('timeout hit'):
cid = _channels.create(REPLACE)
with self.assertRaises(TimeoutError):
_channels.send_buffer(cid, obj, blocking=True, timeout=0.1)
with self.assertRaises(_channels.ChannelEmptyError):
received = recv_nowait(cid)
print(repr(received))
with self.subTest('timeout not hit'):
cid = _channels.create(REPLACE)
def f():
recv_wait(cid)
t = threading.Thread(target=f)
t.start()
_channels.send_buffer(cid, obj, blocking=True, timeout=10)
t.join()
def test_send_closed_while_waiting(self):
obj = b'spam'
wait = self.build_send_waiter(obj)
with self.subTest('without timeout'):
cid = _channels.create(REPLACE)
def f():
wait()
_channels.close(cid, force=True)
t = threading.Thread(target=f)
t.start()
with self.assertRaises(_channels.ChannelClosedError):
_channels.send(cid, obj, blocking=True)
t.join()
with self.subTest('with timeout'):
cid = _channels.create(REPLACE)
def f():
wait()
_channels.close(cid, force=True)
t = threading.Thread(target=f)
t.start()
with self.assertRaises(_channels.ChannelClosedError):
_channels.send(cid, obj, blocking=True, timeout=30)
t.join()
def test_send_buffer_closed_while_waiting(self):
try:
self._has_run_once_closed
except AttributeError:
# At the moment, this test leaks a few references.
# It looks like the leak originates with the addition
# of _channels.send_buffer() (gh-110246), whereas the
# tests were added afterward. We want this test even
# if the refleak isn't fixed yet, so we skip here.
raise unittest.SkipTest('temporarily skipped due to refleaks')
else:
self._has_run_once_closed = True
obj = bytearray(b'spam')
wait = self.build_send_waiter(obj, buffer=True)
with self.subTest('without timeout'):
cid = _channels.create(REPLACE)
def f():
wait()
_channels.close(cid, force=True)
t = threading.Thread(target=f)
t.start()
with self.assertRaises(_channels.ChannelClosedError):
_channels.send_buffer(cid, obj, blocking=True)
t.join()