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cpython/Lib/test/test__xxsubinterpreters.py

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from collections import namedtuple
import contextlib
import itertools
import os
import pickle
import sys
from textwrap import dedent, indent
import threading
import time
import unittest
from test import support
from test.support import script_helper
interpreters = support.import_module('_xxsubinterpreters')
##################################
# helpers
def powerset(*sets):
return itertools.chain.from_iterable(
combinations(sets, r)
for r in range(len(sets)+1))
def _captured_script(script):
r, w = os.pipe()
indented = script.replace('\n', '\n ')
wrapped = dedent(f"""
import contextlib
with open({w}, 'w') as spipe:
with contextlib.redirect_stdout(spipe):
{indented}
""")
return wrapped, open(r)
def _run_output(interp, request, shared=None):
script, rpipe = _captured_script(request)
with rpipe:
interpreters.run_string(interp, script, shared)
return rpipe.read()
@contextlib.contextmanager
def _running(interp):
r, w = os.pipe()
def run():
interpreters.run_string(interp, dedent(f"""
# wait for "signal"
with open({r}) as rpipe:
rpipe.read()
"""))
t = threading.Thread(target=run)
t.start()
yield
with open(w, 'w') as spipe:
spipe.write('done')
t.join()
#@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:
if interpreters.get_current() != main:
raise RuntimeError
# XXX Run a func?
exec(source, _mainns)
else:
interpreters.run_string(id, source, shared)
def run_interp_threaded(id, source, **shared):
def run():
_run(id, source, shared)
t = threading.Thread(target=run)
t.start()
t.join()
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")')
if not isinstance(id, interpreters.InterpreterID):
id = interpreters.InterpreterID(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 interpreters.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 interpreters.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':
interpreters.channel_send(cid, b'spam')
return state.incr()
elif end == 'recv':
if not state.pending:
try:
interpreters.channel_recv(cid)
except interpreters.ChannelEmptyError:
return state
else:
raise Exception('expected ChannelEmptyError')
else:
interpreters.channel_recv(cid)
return state.decr()
else:
raise ValueError(end)
elif action == 'close':
kwargs = {}
if end in ('recv', 'send'):
kwargs[end] = True
interpreters.channel_close(cid, **kwargs)
return state.close()
elif action == 'force-close':
kwargs = {
'force': True,
}
if end in ('recv', 'send'):
kwargs[end] = True
interpreters.channel_close(cid, **kwargs)
return state.close(force=True)
else:
raise ValueError(action)
def clean_up_interpreters():
for id in interpreters.list_all():
if id == 0: # main
continue
try:
interpreters.destroy(id)
except RuntimeError:
pass # already destroyed
def clean_up_channels():
for cid in interpreters.channel_list_all():
try:
interpreters.channel_destroy(cid)
except interpreters.ChannelNotFoundError:
pass # already destroyed
class TestBase(unittest.TestCase):
def tearDown(self):
clean_up_interpreters()
clean_up_channels()
##################################
# misc. tests
class IsShareableTests(unittest.TestCase):
def test_default_shareables(self):
shareables = [
# singletons
None,
# builtin objects
b'spam',
'spam',
10,
-10,
]
for obj in shareables:
with self.subTest(obj):
self.assertTrue(
interpreters.is_shareable(obj))
def test_not_shareable(self):
class Cheese:
def __init__(self, name):
self.name = name
def __str__(self):
return self.name
class SubBytes(bytes):
"""A subclass of a shareable type."""
not_shareables = [
# singletons
True,
False,
NotImplemented,
...,
# builtin types and objects
type,
object,
object(),
Exception(),
100.0,
# user-defined types and objects
Cheese,
Cheese('Wensleydale'),
SubBytes(b'spam'),
]
for obj in not_shareables:
with self.subTest(repr(obj)):
self.assertFalse(
interpreters.is_shareable(obj))
class ShareableTypeTests(unittest.TestCase):
def setUp(self):
super().setUp()
self.cid = interpreters.channel_create()
def tearDown(self):
interpreters.channel_destroy(self.cid)
super().tearDown()
def _assert_values(self, values):
for obj in values:
with self.subTest(obj):
interpreters.channel_send(self.cid, obj)
got = interpreters.channel_recv(self.cid)
self.assertEqual(got, obj)
self.assertIs(type(got), type(obj))
# XXX Check the following in the channel tests?
#self.assertIsNot(got, obj)
def test_singletons(self):
for obj in [None]:
with self.subTest(obj):
interpreters.channel_send(self.cid, obj)
got = interpreters.channel_recv(self.cid)
# XXX What about between interpreters?
self.assertIs(got, obj)
def test_types(self):
self._assert_values([
b'spam',
9999,
self.cid,
])
def test_bytes(self):
self._assert_values(i.to_bytes(2, 'little', signed=True)
for i in range(-1, 258))
def test_int(self):
self._assert_values(itertools.chain(range(-1, 258),
[sys.maxsize, -sys.maxsize - 1]))
def test_non_shareable_int(self):
ints = [
sys.maxsize + 1,
-sys.maxsize - 2,
2**1000,
]
for i in ints:
with self.subTest(i):
with self.assertRaises(OverflowError):
interpreters.channel_send(self.cid, i)
##################################
# interpreter tests
class ListAllTests(TestBase):
def test_initial(self):
main = interpreters.get_main()
ids = interpreters.list_all()
self.assertEqual(ids, [main])
def test_after_creating(self):
main = interpreters.get_main()
first = interpreters.create()
second = interpreters.create()
ids = interpreters.list_all()
self.assertEqual(ids, [main, first, second])
def test_after_destroying(self):
main = interpreters.get_main()
first = interpreters.create()
second = interpreters.create()
interpreters.destroy(first)
ids = interpreters.list_all()
self.assertEqual(ids, [main, second])
class GetCurrentTests(TestBase):
def test_main(self):
main = interpreters.get_main()
cur = interpreters.get_current()
self.assertEqual(cur, main)
self.assertIsInstance(cur, interpreters.InterpreterID)
def test_subinterpreter(self):
main = interpreters.get_main()
interp = interpreters.create()
out = _run_output(interp, dedent("""
import _xxsubinterpreters as _interpreters
cur = _interpreters.get_current()
print(cur)
assert isinstance(cur, _interpreters.InterpreterID)
"""))
cur = int(out.strip())
_, expected = interpreters.list_all()
self.assertEqual(cur, expected)
self.assertNotEqual(cur, main)
class GetMainTests(TestBase):
def test_from_main(self):
[expected] = interpreters.list_all()
main = interpreters.get_main()
self.assertEqual(main, expected)
self.assertIsInstance(main, interpreters.InterpreterID)
def test_from_subinterpreter(self):
[expected] = interpreters.list_all()
interp = interpreters.create()
out = _run_output(interp, dedent("""
import _xxsubinterpreters as _interpreters
main = _interpreters.get_main()
print(main)
assert isinstance(main, _interpreters.InterpreterID)
"""))
main = int(out.strip())
self.assertEqual(main, expected)
class IsRunningTests(TestBase):
def test_main(self):
main = interpreters.get_main()
self.assertTrue(interpreters.is_running(main))
def test_subinterpreter(self):
interp = interpreters.create()
self.assertFalse(interpreters.is_running(interp))
with _running(interp):
self.assertTrue(interpreters.is_running(interp))
self.assertFalse(interpreters.is_running(interp))
def test_from_subinterpreter(self):
interp = interpreters.create()
out = _run_output(interp, dedent(f"""
import _xxsubinterpreters as _interpreters
if _interpreters.is_running({interp}):
print(True)
else:
print(False)
"""))
self.assertEqual(out.strip(), 'True')
def test_already_destroyed(self):
interp = interpreters.create()
interpreters.destroy(interp)
with self.assertRaises(RuntimeError):
interpreters.is_running(interp)
def test_does_not_exist(self):
with self.assertRaises(RuntimeError):
interpreters.is_running(1_000_000)
def test_bad_id(self):
with self.assertRaises(RuntimeError):
interpreters.is_running(-1)
class InterpreterIDTests(TestBase):
def test_with_int(self):
id = interpreters.InterpreterID(10, force=True)
self.assertEqual(int(id), 10)
def test_coerce_id(self):
id = interpreters.InterpreterID('10', force=True)
self.assertEqual(int(id), 10)
id = interpreters.InterpreterID(10.0, force=True)
self.assertEqual(int(id), 10)
class Int(str):
def __init__(self, value):
self._value = value
def __int__(self):
return self._value
id = interpreters.InterpreterID(Int(10), force=True)
self.assertEqual(int(id), 10)
def test_bad_id(self):
for id in [-1, 'spam']:
with self.subTest(id):
with self.assertRaises(ValueError):
interpreters.InterpreterID(id)
with self.assertRaises(OverflowError):
interpreters.InterpreterID(2**64)
with self.assertRaises(TypeError):
interpreters.InterpreterID(object())
def test_does_not_exist(self):
id = interpreters.channel_create()
with self.assertRaises(RuntimeError):
interpreters.InterpreterID(int(id) + 1) # unforced
def test_str(self):
id = interpreters.InterpreterID(10, force=True)
self.assertEqual(str(id), '10')
def test_repr(self):
id = interpreters.InterpreterID(10, force=True)
self.assertEqual(repr(id), 'InterpreterID(10)')
def test_equality(self):
id1 = interpreters.create()
id2 = interpreters.InterpreterID(int(id1))
id3 = interpreters.create()
self.assertTrue(id1 == id1)
self.assertTrue(id1 == id2)
self.assertTrue(id1 == int(id1))
self.assertFalse(id1 == id3)
self.assertFalse(id1 != id1)
self.assertFalse(id1 != id2)
self.assertTrue(id1 != id3)
class CreateTests(TestBase):
def test_in_main(self):
id = interpreters.create()
self.assertIsInstance(id, interpreters.InterpreterID)
self.assertIn(id, interpreters.list_all())
@unittest.skip('enable this test when working on pystate.c')
def test_unique_id(self):
seen = set()
for _ in range(100):
id = interpreters.create()
interpreters.destroy(id)
seen.add(id)
self.assertEqual(len(seen), 100)
def test_in_thread(self):
lock = threading.Lock()
id = None
def f():
nonlocal id
id = interpreters.create()
lock.acquire()
lock.release()
t = threading.Thread(target=f)
with lock:
t.start()
t.join()
self.assertIn(id, interpreters.list_all())
def test_in_subinterpreter(self):
main, = interpreters.list_all()
id1 = interpreters.create()
out = _run_output(id1, dedent("""
import _xxsubinterpreters as _interpreters
id = _interpreters.create()
print(id)
assert isinstance(id, _interpreters.InterpreterID)
"""))
id2 = int(out.strip())
self.assertEqual(set(interpreters.list_all()), {main, id1, id2})
def test_in_threaded_subinterpreter(self):
main, = interpreters.list_all()
id1 = interpreters.create()
id2 = None
def f():
nonlocal id2
out = _run_output(id1, dedent("""
import _xxsubinterpreters as _interpreters
id = _interpreters.create()
print(id)
"""))
id2 = int(out.strip())
t = threading.Thread(target=f)
t.start()
t.join()
self.assertEqual(set(interpreters.list_all()), {main, id1, id2})
def test_after_destroy_all(self):
before = set(interpreters.list_all())
# Create 3 subinterpreters.
ids = []
for _ in range(3):
id = interpreters.create()
ids.append(id)
# Now destroy them.
for id in ids:
interpreters.destroy(id)
# Finally, create another.
id = interpreters.create()
self.assertEqual(set(interpreters.list_all()), before | {id})
def test_after_destroy_some(self):
before = set(interpreters.list_all())
# Create 3 subinterpreters.
id1 = interpreters.create()
id2 = interpreters.create()
id3 = interpreters.create()
# Now destroy 2 of them.
interpreters.destroy(id1)
interpreters.destroy(id3)
# Finally, create another.
id = interpreters.create()
self.assertEqual(set(interpreters.list_all()), before | {id, id2})
class DestroyTests(TestBase):
def test_one(self):
id1 = interpreters.create()
id2 = interpreters.create()
id3 = interpreters.create()
self.assertIn(id2, interpreters.list_all())
interpreters.destroy(id2)
self.assertNotIn(id2, interpreters.list_all())
self.assertIn(id1, interpreters.list_all())
self.assertIn(id3, interpreters.list_all())
def test_all(self):
before = set(interpreters.list_all())
ids = set()
for _ in range(3):
id = interpreters.create()
ids.add(id)
self.assertEqual(set(interpreters.list_all()), before | ids)
for id in ids:
interpreters.destroy(id)
self.assertEqual(set(interpreters.list_all()), before)
def test_main(self):
main, = interpreters.list_all()
with self.assertRaises(RuntimeError):
interpreters.destroy(main)
def f():
with self.assertRaises(RuntimeError):
interpreters.destroy(main)
t = threading.Thread(target=f)
t.start()
t.join()
def test_already_destroyed(self):
id = interpreters.create()
interpreters.destroy(id)
with self.assertRaises(RuntimeError):
interpreters.destroy(id)
def test_does_not_exist(self):
with self.assertRaises(RuntimeError):
interpreters.destroy(1_000_000)
def test_bad_id(self):
with self.assertRaises(RuntimeError):
interpreters.destroy(-1)
def test_from_current(self):
main, = interpreters.list_all()
id = interpreters.create()
script = dedent(f"""
import _xxsubinterpreters as _interpreters
try:
_interpreters.destroy({id})
except RuntimeError:
pass
""")
interpreters.run_string(id, script)
self.assertEqual(set(interpreters.list_all()), {main, id})
def test_from_sibling(self):
main, = interpreters.list_all()
id1 = interpreters.create()
id2 = interpreters.create()
script = dedent(f"""
import _xxsubinterpreters as _interpreters
_interpreters.destroy({id2})
""")
interpreters.run_string(id1, script)
self.assertEqual(set(interpreters.list_all()), {main, id1})
def test_from_other_thread(self):
id = interpreters.create()
def f():
interpreters.destroy(id)
t = threading.Thread(target=f)
t.start()
t.join()
def test_still_running(self):
main, = interpreters.list_all()
interp = interpreters.create()
with _running(interp):
with self.assertRaises(RuntimeError):
interpreters.destroy(interp)
self.assertTrue(interpreters.is_running(interp))
class RunStringTests(TestBase):
SCRIPT = dedent("""
with open('{}', 'w') as out:
out.write('{}')
""")
FILENAME = 'spam'
def setUp(self):
super().setUp()
self.id = interpreters.create()
self._fs = None
def tearDown(self):
if self._fs is not None:
self._fs.close()
super().tearDown()
@property
def fs(self):
if self._fs is None:
self._fs = FSFixture(self)
return self._fs
def test_success(self):
script, file = _captured_script('print("it worked!", end="")')
with file:
interpreters.run_string(self.id, script)
out = file.read()
self.assertEqual(out, 'it worked!')
def test_in_thread(self):
script, file = _captured_script('print("it worked!", end="")')
with file:
def f():
interpreters.run_string(self.id, script)
t = threading.Thread(target=f)
t.start()
t.join()
out = file.read()
self.assertEqual(out, 'it worked!')
def test_create_thread(self):
script, file = _captured_script("""
import threading
def f():
print('it worked!', end='')
t = threading.Thread(target=f)
t.start()
t.join()
""")
with file:
interpreters.run_string(self.id, script)
out = file.read()
self.assertEqual(out, 'it worked!')
@unittest.skipUnless(hasattr(os, 'fork'), "test needs os.fork()")
def test_fork(self):
import tempfile
with tempfile.NamedTemporaryFile('w+') as file:
file.write('')
file.flush()
expected = 'spam spam spam spam spam'
script = dedent(f"""
import os
try:
os.fork()
except RuntimeError:
with open('{file.name}', 'w') as out:
out.write('{expected}')
""")
interpreters.run_string(self.id, script)
file.seek(0)
content = file.read()
self.assertEqual(content, expected)
def test_already_running(self):
with _running(self.id):
with self.assertRaises(RuntimeError):
interpreters.run_string(self.id, 'print("spam")')
def test_does_not_exist(self):
id = 0
while id in interpreters.list_all():
id += 1
with self.assertRaises(RuntimeError):
interpreters.run_string(id, 'print("spam")')
def test_error_id(self):
with self.assertRaises(RuntimeError):
interpreters.run_string(-1, 'print("spam")')
def test_bad_id(self):
with self.assertRaises(TypeError):
interpreters.run_string('spam', 'print("spam")')
def test_bad_script(self):
with self.assertRaises(TypeError):
interpreters.run_string(self.id, 10)
def test_bytes_for_script(self):
with self.assertRaises(TypeError):
interpreters.run_string(self.id, b'print("spam")')
@contextlib.contextmanager
def assert_run_failed(self, exctype, msg=None):
with self.assertRaises(interpreters.RunFailedError) as caught:
yield
if msg is None:
self.assertEqual(str(caught.exception).split(':')[0],
str(exctype))
else:
self.assertEqual(str(caught.exception),
"{}: {}".format(exctype, msg))
def test_invalid_syntax(self):
with self.assert_run_failed(SyntaxError):
# missing close paren
interpreters.run_string(self.id, 'print("spam"')
def test_failure(self):
with self.assert_run_failed(Exception, 'spam'):
interpreters.run_string(self.id, 'raise Exception("spam")')
def test_SystemExit(self):
with self.assert_run_failed(SystemExit, '42'):
interpreters.run_string(self.id, 'raise SystemExit(42)')
def test_sys_exit(self):
with self.assert_run_failed(SystemExit):
interpreters.run_string(self.id, dedent("""
import sys
sys.exit()
"""))
with self.assert_run_failed(SystemExit, '42'):
interpreters.run_string(self.id, dedent("""
import sys
sys.exit(42)
"""))
def test_with_shared(self):
r, w = os.pipe()
shared = {
'spam': b'ham',
'eggs': b'-1',
'cheddar': None,
}
script = dedent(f"""
eggs = int(eggs)
spam = 42
result = spam + eggs
ns = dict(vars())
del ns['__builtins__']
import pickle
with open({w}, 'wb') as chan:
pickle.dump(ns, chan)
""")
interpreters.run_string(self.id, script, shared)
with open(r, 'rb') as chan:
ns = pickle.load(chan)
self.assertEqual(ns['spam'], 42)
self.assertEqual(ns['eggs'], -1)
self.assertEqual(ns['result'], 41)
self.assertIsNone(ns['cheddar'])
def test_shared_overwrites(self):
interpreters.run_string(self.id, dedent("""
spam = 'eggs'
ns1 = dict(vars())
del ns1['__builtins__']
"""))
shared = {'spam': b'ham'}
script = dedent(f"""
ns2 = dict(vars())
del ns2['__builtins__']
""")
interpreters.run_string(self.id, script, shared)
r, w = os.pipe()
script = dedent(f"""
ns = dict(vars())
del ns['__builtins__']
import pickle
with open({w}, 'wb') as chan:
pickle.dump(ns, chan)
""")
interpreters.run_string(self.id, script)
with open(r, 'rb') as chan:
ns = pickle.load(chan)
self.assertEqual(ns['ns1']['spam'], 'eggs')
self.assertEqual(ns['ns2']['spam'], b'ham')
self.assertEqual(ns['spam'], b'ham')
def test_shared_overwrites_default_vars(self):
r, w = os.pipe()
shared = {'__name__': b'not __main__'}
script = dedent(f"""
spam = 42
ns = dict(vars())
del ns['__builtins__']
import pickle
with open({w}, 'wb') as chan:
pickle.dump(ns, chan)
""")
interpreters.run_string(self.id, script, shared)
with open(r, 'rb') as chan:
ns = pickle.load(chan)
self.assertEqual(ns['__name__'], b'not __main__')
def test_main_reused(self):
r, w = os.pipe()
interpreters.run_string(self.id, dedent(f"""
spam = True
ns = dict(vars())
del ns['__builtins__']
import pickle
with open({w}, 'wb') as chan:
pickle.dump(ns, chan)
del ns, pickle, chan
"""))
with open(r, 'rb') as chan:
ns1 = pickle.load(chan)
r, w = os.pipe()
interpreters.run_string(self.id, dedent(f"""
eggs = False
ns = dict(vars())
del ns['__builtins__']
import pickle
with open({w}, 'wb') as chan:
pickle.dump(ns, chan)
"""))
with open(r, 'rb') as chan:
ns2 = pickle.load(chan)
self.assertIn('spam', ns1)
self.assertNotIn('eggs', ns1)
self.assertIn('eggs', ns2)
self.assertIn('spam', ns2)
def test_execution_namespace_is_main(self):
r, w = os.pipe()
script = dedent(f"""
spam = 42
ns = dict(vars())
ns['__builtins__'] = str(ns['__builtins__'])
import pickle
with open({w}, 'wb') as chan:
pickle.dump(ns, chan)
""")
interpreters.run_string(self.id, script)
with open(r, 'rb') as chan:
ns = pickle.load(chan)
ns.pop('__builtins__')
ns.pop('__loader__')
self.assertEqual(ns, {
'__name__': '__main__',
'__annotations__': {},
'__doc__': None,
'__package__': None,
'__spec__': None,
'spam': 42,
})
# XXX Fix this test!
@unittest.skip('blocking forever')
def test_still_running_at_exit(self):
script = dedent(f"""
from textwrap import dedent
import threading
import _xxsubinterpreters as _interpreters
id = _interpreters.create()
def f():
_interpreters.run_string(id, dedent('''
import time
# Give plenty of time for the main interpreter to finish.
time.sleep(1_000_000)
'''))
t = threading.Thread(target=f)
t.start()
""")
with support.temp_dir() as dirname:
filename = script_helper.make_script(dirname, 'interp', script)
with script_helper.spawn_python(filename) as proc:
retcode = proc.wait()
self.assertEqual(retcode, 0)
##################################
# channel tests
class ChannelIDTests(TestBase):
def test_default_kwargs(self):
cid = interpreters._channel_id(10, force=True)
self.assertEqual(int(cid), 10)
self.assertEqual(cid.end, 'both')
def test_with_kwargs(self):
cid = interpreters._channel_id(10, send=True, force=True)
self.assertEqual(cid.end, 'send')
cid = interpreters._channel_id(10, send=True, recv=False, force=True)
self.assertEqual(cid.end, 'send')
cid = interpreters._channel_id(10, recv=True, force=True)
self.assertEqual(cid.end, 'recv')
cid = interpreters._channel_id(10, recv=True, send=False, force=True)
self.assertEqual(cid.end, 'recv')
cid = interpreters._channel_id(10, send=True, recv=True, force=True)
self.assertEqual(cid.end, 'both')
def test_coerce_id(self):
cid = interpreters._channel_id('10', force=True)
self.assertEqual(int(cid), 10)
cid = interpreters._channel_id(10.0, force=True)
self.assertEqual(int(cid), 10)
class Int(str):
def __init__(self, value):
self._value = value
def __int__(self):
return self._value
cid = interpreters._channel_id(Int(10), force=True)
self.assertEqual(int(cid), 10)
def test_bad_id(self):
for cid in [-1, 'spam']:
with self.subTest(cid):
with self.assertRaises(ValueError):
interpreters._channel_id(cid)
with self.assertRaises(OverflowError):
interpreters._channel_id(2**64)
with self.assertRaises(TypeError):
interpreters._channel_id(object())
def test_bad_kwargs(self):
with self.assertRaises(ValueError):
interpreters._channel_id(10, send=False, recv=False)
def test_does_not_exist(self):
cid = interpreters.channel_create()
with self.assertRaises(interpreters.ChannelNotFoundError):
interpreters._channel_id(int(cid) + 1) # unforced
def test_str(self):
cid = interpreters._channel_id(10, force=True)
self.assertEqual(str(cid), '10')
def test_repr(self):
cid = interpreters._channel_id(10, force=True)
self.assertEqual(repr(cid), 'ChannelID(10)')
cid = interpreters._channel_id(10, send=True, force=True)
self.assertEqual(repr(cid), 'ChannelID(10, send=True)')
cid = interpreters._channel_id(10, recv=True, force=True)
self.assertEqual(repr(cid), 'ChannelID(10, recv=True)')
cid = interpreters._channel_id(10, send=True, recv=True, force=True)
self.assertEqual(repr(cid), 'ChannelID(10)')
def test_equality(self):
cid1 = interpreters.channel_create()
cid2 = interpreters._channel_id(int(cid1))
cid3 = interpreters.channel_create()
self.assertTrue(cid1 == cid1)
self.assertTrue(cid1 == cid2)
self.assertTrue(cid1 == int(cid1))
self.assertFalse(cid1 == cid3)
self.assertFalse(cid1 != cid1)
self.assertFalse(cid1 != cid2)
self.assertTrue(cid1 != cid3)
class ChannelTests(TestBase):
def test_create_cid(self):
cid = interpreters.channel_create()
self.assertIsInstance(cid, interpreters.ChannelID)
def test_sequential_ids(self):
before = interpreters.channel_list_all()
id1 = interpreters.channel_create()
id2 = interpreters.channel_create()
id3 = interpreters.channel_create()
after = interpreters.channel_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 _xxsubinterpreters as _interpreters
cid = _interpreters.channel_create()
print(cid)
"""))
cid1 = int(out.strip())
id2 = interpreters.create()
out = _run_output(id2, dedent("""
import _xxsubinterpreters as _interpreters
cid = _interpreters.channel_create()
print(cid)
"""))
cid2 = int(out.strip())
self.assertEqual(cid2, int(cid1) + 1)
####################
def test_send_recv_main(self):
cid = interpreters.channel_create()
orig = b'spam'
interpreters.channel_send(cid, orig)
obj = interpreters.channel_recv(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 _xxsubinterpreters as _interpreters
cid = _interpreters.channel_create()
orig = b'spam'
_interpreters.channel_send(cid, orig)
obj = _interpreters.channel_recv(cid)
assert obj is not orig
assert obj == orig
"""))
def test_send_recv_different_interpreters(self):
cid = interpreters.channel_create()
id1 = interpreters.create()
out = _run_output(id1, dedent(f"""
import _xxsubinterpreters as _interpreters
_interpreters.channel_send({cid}, b'spam')
"""))
obj = interpreters.channel_recv(cid)
self.assertEqual(obj, b'spam')
def test_send_recv_different_threads(self):
cid = interpreters.channel_create()
def f():
while True:
try:
obj = interpreters.channel_recv(cid)
break
except interpreters.ChannelEmptyError:
time.sleep(0.1)
interpreters.channel_send(cid, obj)
t = threading.Thread(target=f)
t.start()
interpreters.channel_send(cid, b'spam')
t.join()
obj = interpreters.channel_recv(cid)
self.assertEqual(obj, b'spam')
def test_send_recv_different_interpreters_and_threads(self):
cid = interpreters.channel_create()
id1 = interpreters.create()
out = None
def f():
nonlocal out
out = _run_output(id1, dedent(f"""
import time
import _xxsubinterpreters as _interpreters
while True:
try:
obj = _interpreters.channel_recv({cid})
break
except _interpreters.ChannelEmptyError:
time.sleep(0.1)
assert(obj == b'spam')
_interpreters.channel_send({cid}, b'eggs')
"""))
t = threading.Thread(target=f)
t.start()
interpreters.channel_send(cid, b'spam')
t.join()
obj = interpreters.channel_recv(cid)
self.assertEqual(obj, b'eggs')
def test_send_not_found(self):
with self.assertRaises(interpreters.ChannelNotFoundError):
interpreters.channel_send(10, b'spam')
def test_recv_not_found(self):
with self.assertRaises(interpreters.ChannelNotFoundError):
interpreters.channel_recv(10)
def test_recv_empty(self):
cid = interpreters.channel_create()
with self.assertRaises(interpreters.ChannelEmptyError):
interpreters.channel_recv(cid)
def test_run_string_arg_unresolved(self):
cid = interpreters.channel_create()
interp = interpreters.create()
out = _run_output(interp, dedent("""
import _xxsubinterpreters as _interpreters
print(cid.end)
_interpreters.channel_send(cid, b'spam')
"""),
dict(cid=cid.send))
obj = interpreters.channel_recv(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 = interpreters.channel_create()
cid = interpreters._channel_id(cid, _resolve=True)
interp = interpreters.create()
out = _run_output(interp, dedent("""
import _xxsubinterpreters as _interpreters
print(chan.id.end)
_interpreters.channel_send(chan.id, b'spam')
"""),
dict(chan=cid.send))
obj = interpreters.channel_recv(cid)
self.assertEqual(obj, b'spam')
self.assertEqual(out.strip(), 'send')
# close
def test_close_single_user(self):
cid = interpreters.channel_create()
interpreters.channel_send(cid, b'spam')
interpreters.channel_recv(cid)
interpreters.channel_close(cid)
with self.assertRaises(interpreters.ChannelClosedError):
interpreters.channel_send(cid, b'eggs')
with self.assertRaises(interpreters.ChannelClosedError):
interpreters.channel_recv(cid)
def test_close_multiple_users(self):
cid = interpreters.channel_create()
id1 = interpreters.create()
id2 = interpreters.create()
interpreters.run_string(id1, dedent(f"""
import _xxsubinterpreters as _interpreters
_interpreters.channel_send({cid}, b'spam')
"""))
interpreters.run_string(id2, dedent(f"""
import _xxsubinterpreters as _interpreters
_interpreters.channel_recv({cid})
"""))
interpreters.channel_close(cid)
with self.assertRaises(interpreters.RunFailedError) as cm:
interpreters.run_string(id1, dedent(f"""
_interpreters.channel_send({cid}, b'spam')
"""))
self.assertIn('ChannelClosedError', str(cm.exception))
with self.assertRaises(interpreters.RunFailedError) as cm:
interpreters.run_string(id2, dedent(f"""
_interpreters.channel_send({cid}, b'spam')
"""))
self.assertIn('ChannelClosedError', str(cm.exception))
def test_close_multiple_times(self):
cid = interpreters.channel_create()
interpreters.channel_send(cid, b'spam')
interpreters.channel_recv(cid)
interpreters.channel_close(cid)
with self.assertRaises(interpreters.ChannelClosedError):
interpreters.channel_close(cid)
def test_close_empty(self):
tests = [
(False, False),
(True, False),
(False, True),
(True, True),
]
for send, recv in tests:
with self.subTest((send, recv)):
cid = interpreters.channel_create()
interpreters.channel_send(cid, b'spam')
interpreters.channel_recv(cid)
interpreters.channel_close(cid, send=send, recv=recv)
with self.assertRaises(interpreters.ChannelClosedError):
interpreters.channel_send(cid, b'eggs')
with self.assertRaises(interpreters.ChannelClosedError):
interpreters.channel_recv(cid)
def test_close_defaults_with_unused_items(self):
cid = interpreters.channel_create()
interpreters.channel_send(cid, b'spam')
interpreters.channel_send(cid, b'ham')
with self.assertRaises(interpreters.ChannelNotEmptyError):
interpreters.channel_close(cid)
interpreters.channel_recv(cid)
interpreters.channel_send(cid, b'eggs')
def test_close_recv_with_unused_items_unforced(self):
cid = interpreters.channel_create()
interpreters.channel_send(cid, b'spam')
interpreters.channel_send(cid, b'ham')
with self.assertRaises(interpreters.ChannelNotEmptyError):
interpreters.channel_close(cid, recv=True)
interpreters.channel_recv(cid)
interpreters.channel_send(cid, b'eggs')
interpreters.channel_recv(cid)
interpreters.channel_recv(cid)
interpreters.channel_close(cid, recv=True)
def test_close_send_with_unused_items_unforced(self):
cid = interpreters.channel_create()
interpreters.channel_send(cid, b'spam')
interpreters.channel_send(cid, b'ham')
interpreters.channel_close(cid, send=True)
with self.assertRaises(interpreters.ChannelClosedError):
interpreters.channel_send(cid, b'eggs')
interpreters.channel_recv(cid)
interpreters.channel_recv(cid)
with self.assertRaises(interpreters.ChannelClosedError):
interpreters.channel_recv(cid)
def test_close_both_with_unused_items_unforced(self):
cid = interpreters.channel_create()
interpreters.channel_send(cid, b'spam')
interpreters.channel_send(cid, b'ham')
with self.assertRaises(interpreters.ChannelNotEmptyError):
interpreters.channel_close(cid, recv=True, send=True)
interpreters.channel_recv(cid)
interpreters.channel_send(cid, b'eggs')
interpreters.channel_recv(cid)
interpreters.channel_recv(cid)
interpreters.channel_close(cid, recv=True)
def test_close_recv_with_unused_items_forced(self):
cid = interpreters.channel_create()
interpreters.channel_send(cid, b'spam')
interpreters.channel_send(cid, b'ham')
interpreters.channel_close(cid, recv=True, force=True)
with self.assertRaises(interpreters.ChannelClosedError):
interpreters.channel_send(cid, b'eggs')
with self.assertRaises(interpreters.ChannelClosedError):
interpreters.channel_recv(cid)
def test_close_send_with_unused_items_forced(self):
cid = interpreters.channel_create()
interpreters.channel_send(cid, b'spam')
interpreters.channel_send(cid, b'ham')
interpreters.channel_close(cid, send=True, force=True)
with self.assertRaises(interpreters.ChannelClosedError):
interpreters.channel_send(cid, b'eggs')
with self.assertRaises(interpreters.ChannelClosedError):
interpreters.channel_recv(cid)
def test_close_both_with_unused_items_forced(self):
cid = interpreters.channel_create()
interpreters.channel_send(cid, b'spam')
interpreters.channel_send(cid, b'ham')
interpreters.channel_close(cid, send=True, recv=True, force=True)
with self.assertRaises(interpreters.ChannelClosedError):
interpreters.channel_send(cid, b'eggs')
with self.assertRaises(interpreters.ChannelClosedError):
interpreters.channel_recv(cid)
def test_close_never_used(self):
cid = interpreters.channel_create()
interpreters.channel_close(cid)
with self.assertRaises(interpreters.ChannelClosedError):
interpreters.channel_send(cid, b'spam')
with self.assertRaises(interpreters.ChannelClosedError):
interpreters.channel_recv(cid)
def test_close_by_unassociated_interp(self):
cid = interpreters.channel_create()
interpreters.channel_send(cid, b'spam')
interp = interpreters.create()
interpreters.run_string(interp, dedent(f"""
import _xxsubinterpreters as _interpreters
_interpreters.channel_close({cid}, force=True)
"""))
with self.assertRaises(interpreters.ChannelClosedError):
interpreters.channel_recv(cid)
with self.assertRaises(interpreters.ChannelClosedError):
interpreters.channel_close(cid)
def test_close_used_multiple_times_by_single_user(self):
cid = interpreters.channel_create()
interpreters.channel_send(cid, b'spam')
interpreters.channel_send(cid, b'spam')
interpreters.channel_send(cid, b'spam')
interpreters.channel_recv(cid)
interpreters.channel_close(cid, force=True)
with self.assertRaises(interpreters.ChannelClosedError):
interpreters.channel_send(cid, b'eggs')
with self.assertRaises(interpreters.ChannelClosedError):
interpreters.channel_recv(cid)
class ChannelReleaseTests(TestBase):
# XXX Add more test coverage a la the tests for close().
"""
- main / interp / other
- run in: current thread / new thread / other thread / different threads
- end / opposite
- force / no force
- used / not used (associated / not associated)
- empty / emptied / never emptied / partly emptied
- closed / not closed
- released / not released
- creator (interp) / other
- associated interpreter not running
- associated interpreter destroyed
"""
"""
use
pre-release
release
after
check
"""
"""
release in: main, interp1
creator: same, other (incl. interp2)
use: None,send,recv,send/recv in None,same,other(incl. interp2),same+other(incl. interp2),all
pre-release: None,send,recv,both in None,same,other(incl. interp2),same+other(incl. interp2),all
pre-release forced: None,send,recv,both in None,same,other(incl. interp2),same+other(incl. interp2),all
release: same
release forced: same
use after: None,send,recv,send/recv in None,same,other(incl. interp2),same+other(incl. interp2),all
release after: None,send,recv,send/recv in None,same,other(incl. interp2),same+other(incl. interp2),all
check released: send/recv for same/other(incl. interp2)
check closed: send/recv for same/other(incl. interp2)
"""
def test_single_user(self):
cid = interpreters.channel_create()
interpreters.channel_send(cid, b'spam')
interpreters.channel_recv(cid)
interpreters.channel_release(cid, send=True, recv=True)
with self.assertRaises(interpreters.ChannelClosedError):
interpreters.channel_send(cid, b'eggs')
with self.assertRaises(interpreters.ChannelClosedError):
interpreters.channel_recv(cid)
def test_multiple_users(self):
cid = interpreters.channel_create()
id1 = interpreters.create()
id2 = interpreters.create()
interpreters.run_string(id1, dedent(f"""
import _xxsubinterpreters as _interpreters
_interpreters.channel_send({cid}, b'spam')
"""))
out = _run_output(id2, dedent(f"""
import _xxsubinterpreters as _interpreters
obj = _interpreters.channel_recv({cid})
_interpreters.channel_release({cid})
print(repr(obj))
"""))
interpreters.run_string(id1, dedent(f"""
_interpreters.channel_release({cid})
"""))
self.assertEqual(out.strip(), "b'spam'")
def test_no_kwargs(self):
cid = interpreters.channel_create()
interpreters.channel_send(cid, b'spam')
interpreters.channel_recv(cid)
interpreters.channel_release(cid)
with self.assertRaises(interpreters.ChannelClosedError):
interpreters.channel_send(cid, b'eggs')
with self.assertRaises(interpreters.ChannelClosedError):
interpreters.channel_recv(cid)
def test_multiple_times(self):
cid = interpreters.channel_create()
interpreters.channel_send(cid, b'spam')
interpreters.channel_recv(cid)
interpreters.channel_release(cid, send=True, recv=True)
with self.assertRaises(interpreters.ChannelClosedError):
interpreters.channel_release(cid, send=True, recv=True)
def test_with_unused_items(self):
cid = interpreters.channel_create()
interpreters.channel_send(cid, b'spam')
interpreters.channel_send(cid, b'ham')
interpreters.channel_release(cid, send=True, recv=True)
with self.assertRaises(interpreters.ChannelClosedError):
interpreters.channel_recv(cid)
def test_never_used(self):
cid = interpreters.channel_create()
interpreters.channel_release(cid)
with self.assertRaises(interpreters.ChannelClosedError):
interpreters.channel_send(cid, b'spam')
with self.assertRaises(interpreters.ChannelClosedError):
interpreters.channel_recv(cid)
def test_by_unassociated_interp(self):
cid = interpreters.channel_create()
interpreters.channel_send(cid, b'spam')
interp = interpreters.create()
interpreters.run_string(interp, dedent(f"""
import _xxsubinterpreters as _interpreters
_interpreters.channel_release({cid})
"""))
obj = interpreters.channel_recv(cid)
interpreters.channel_release(cid)
with self.assertRaises(interpreters.ChannelClosedError):
interpreters.channel_send(cid, b'eggs')
self.assertEqual(obj, b'spam')
def test_close_if_unassociated(self):
# XXX Something's not right with this test...
cid = interpreters.channel_create()
interp = interpreters.create()
interpreters.run_string(interp, dedent(f"""
import _xxsubinterpreters as _interpreters
obj = _interpreters.channel_send({cid}, b'spam')
_interpreters.channel_release({cid})
"""))
with self.assertRaises(interpreters.ChannelClosedError):
interpreters.channel_recv(cid)
def test_partially(self):
# XXX Is partial close too weird/confusing?
cid = interpreters.channel_create()
interpreters.channel_send(cid, None)
interpreters.channel_recv(cid)
interpreters.channel_send(cid, b'spam')
interpreters.channel_release(cid, send=True)
obj = interpreters.channel_recv(cid)
self.assertEqual(obj, b'spam')
def test_used_multiple_times_by_single_user(self):
cid = interpreters.channel_create()
interpreters.channel_send(cid, b'spam')
interpreters.channel_send(cid, b'spam')
interpreters.channel_send(cid, b'spam')
interpreters.channel_recv(cid)
interpreters.channel_release(cid, send=True, recv=True)
with self.assertRaises(interpreters.ChannelClosedError):
interpreters.channel_send(cid, b'eggs')
with self.assertRaises(interpreters.ChannelClosedError):
interpreters.channel_recv(cid)
class ChannelCloseFixture(namedtuple('ChannelCloseFixture',
'end interp other extra creator')):
# Set this to True to avoid creating interpreters, e.g. when
# scanning through test permutations without running them.
QUICK = False
def __new__(cls, end, interp, other, extra, creator):
assert end in ('send', 'recv')
if cls.QUICK:
known = {}
else:
interp = Interpreter.from_raw(interp)
other = Interpreter.from_raw(other)
extra = Interpreter.from_raw(extra)
known = {
interp.name: interp,
other.name: other,
extra.name: extra,
}
if not creator:
creator = 'same'
self = super().__new__(cls, end, interp, other, extra, creator)
self._prepped = set()
self._state = ChannelState()
self._known = known
return self
@property
def state(self):
return self._state
@property
def cid(self):
try:
return self._cid
except AttributeError:
creator = self._get_interpreter(self.creator)
self._cid = self._new_channel(creator)
return self._cid
def get_interpreter(self, interp):
interp = self._get_interpreter(interp)
self._prep_interpreter(interp)
return interp
def expect_closed_error(self, end=None):
if end is None:
end = self.end
if end == 'recv' and self.state.closed == 'send':
return False
return bool(self.state.closed)
def prep_interpreter(self, interp):
self._prep_interpreter(interp)
def record_action(self, action, result):
self._state = result
def clean_up(self):
clean_up_interpreters()
clean_up_channels()
# internal methods
def _new_channel(self, creator):
if creator.name == 'main':
return interpreters.channel_create()
else:
ch = interpreters.channel_create()
run_interp(creator.id, f"""
import _xxsubinterpreters
cid = _xxsubinterpreters.channel_create()
# We purposefully send back an int to avoid tying the
# channel to the other interpreter.
_xxsubinterpreters.channel_send({ch}, int(cid))
del _xxsubinterpreters
""")
self._cid = interpreters.channel_recv(ch)
return self._cid
def _get_interpreter(self, interp):
if interp in ('same', 'interp'):
return self.interp
elif interp == 'other':
return self.other
elif interp == 'extra':
return self.extra
else:
name = interp
try:
interp = self._known[name]
except KeyError:
interp = self._known[name] = Interpreter(name)
return interp
def _prep_interpreter(self, interp):
if interp.id in self._prepped:
return
self._prepped.add(interp.id)
if interp.name == 'main':
return
run_interp(interp.id, f"""
import _xxsubinterpreters as interpreters
import test.test__xxsubinterpreters as helpers
ChannelState = helpers.ChannelState
try:
cid
except NameError:
cid = interpreters._channel_id({self.cid})
""")
@unittest.skip('these tests take several hours to run')
class ExhaustiveChannelTests(TestBase):
"""
- main / interp / other
- run in: current thread / new thread / other thread / different threads
- end / opposite
- force / no force
- used / not used (associated / not associated)
- empty / emptied / never emptied / partly emptied
- closed / not closed
- released / not released
- creator (interp) / other
- associated interpreter not running
- associated interpreter destroyed
- close after unbound
"""
"""
use
pre-close
close
after
check
"""
"""
close in: main, interp1
creator: same, other, extra
use: None,send,recv,send/recv in None,same,other,same+other,all
pre-close: None,send,recv in None,same,other,same+other,all
pre-close forced: None,send,recv in None,same,other,same+other,all
close: same
close forced: same
use after: None,send,recv,send/recv in None,same,other,extra,same+other,all
close after: None,send,recv,send/recv in None,same,other,extra,same+other,all
check closed: send/recv for same/other(incl. interp2)
"""
def iter_action_sets(self):
# - used / not used (associated / not associated)
# - empty / emptied / never emptied / partly emptied
# - closed / not closed
# - released / not released
# never used
yield []
# only pre-closed (and possible used after)
for closeactions in self._iter_close_action_sets('same', 'other'):
yield closeactions
for postactions in self._iter_post_close_action_sets():
yield closeactions + postactions
for closeactions in self._iter_close_action_sets('other', 'extra'):
yield closeactions
for postactions in self._iter_post_close_action_sets():
yield closeactions + postactions
# used
for useactions in self._iter_use_action_sets('same', 'other'):
yield useactions
for closeactions in self._iter_close_action_sets('same', 'other'):
actions = useactions + closeactions
yield actions
for postactions in self._iter_post_close_action_sets():
yield actions + postactions
for closeactions in self._iter_close_action_sets('other', 'extra'):
actions = useactions + closeactions
yield actions
for postactions in self._iter_post_close_action_sets():
yield actions + postactions
for useactions in self._iter_use_action_sets('other', 'extra'):
yield useactions
for closeactions in self._iter_close_action_sets('same', 'other'):
actions = useactions + closeactions
yield actions
for postactions in self._iter_post_close_action_sets():
yield actions + postactions
for closeactions in self._iter_close_action_sets('other', 'extra'):
actions = useactions + closeactions
yield actions
for postactions in self._iter_post_close_action_sets():
yield actions + postactions
def _iter_use_action_sets(self, interp1, interp2):
interps = (interp1, interp2)
# only recv end used
yield [
ChannelAction('use', 'recv', interp1),
]
yield [
ChannelAction('use', 'recv', interp2),
]
yield [
ChannelAction('use', 'recv', interp1),
ChannelAction('use', 'recv', interp2),
]
# never emptied
yield [
ChannelAction('use', 'send', interp1),
]
yield [
ChannelAction('use', 'send', interp2),
]
yield [
ChannelAction('use', 'send', interp1),
ChannelAction('use', 'send', interp2),
]
# partially emptied
for interp1 in interps:
for interp2 in interps:
for interp3 in interps:
yield [
ChannelAction('use', 'send', interp1),
ChannelAction('use', 'send', interp2),
ChannelAction('use', 'recv', interp3),
]
# fully emptied
for interp1 in interps:
for interp2 in interps:
for interp3 in interps:
for interp4 in interps:
yield [
ChannelAction('use', 'send', interp1),
ChannelAction('use', 'send', interp2),
ChannelAction('use', 'recv', interp3),
ChannelAction('use', 'recv', interp4),
]
def _iter_close_action_sets(self, interp1, interp2):
ends = ('recv', 'send')
interps = (interp1, interp2)
for force in (True, False):
op = 'force-close' if force else 'close'
for interp in interps:
for end in ends:
yield [
ChannelAction(op, end, interp),
]
for recvop in ('close', 'force-close'):
for sendop in ('close', 'force-close'):
for recv in interps:
for send in interps:
yield [
ChannelAction(recvop, 'recv', recv),
ChannelAction(sendop, 'send', send),
]
def _iter_post_close_action_sets(self):
for interp in ('same', 'extra', 'other'):
yield [
ChannelAction('use', 'recv', interp),
]
yield [
ChannelAction('use', 'send', interp),
]
def run_actions(self, fix, actions):
for action in actions:
self.run_action(fix, action)
def run_action(self, fix, action, *, hideclosed=True):
end = action.resolve_end(fix.end)
interp = action.resolve_interp(fix.interp, fix.other, fix.extra)
fix.prep_interpreter(interp)
if interp.name == 'main':
result = run_action(
fix.cid,
action.action,
end,
fix.state,
hideclosed=hideclosed,
)
fix.record_action(action, result)
else:
_cid = interpreters.channel_create()
run_interp(interp.id, f"""
result = helpers.run_action(
{fix.cid},
{repr(action.action)},
{repr(end)},
{repr(fix.state)},
hideclosed={hideclosed},
)
interpreters.channel_send({_cid}, result.pending.to_bytes(1, 'little'))
interpreters.channel_send({_cid}, b'X' if result.closed else b'')
""")
result = ChannelState(
pending=int.from_bytes(interpreters.channel_recv(_cid), 'little'),
closed=bool(interpreters.channel_recv(_cid)),
)
fix.record_action(action, result)
def iter_fixtures(self):
# XXX threads?
interpreters = [
('main', 'interp', 'extra'),
('interp', 'main', 'extra'),
('interp1', 'interp2', 'extra'),
('interp1', 'interp2', 'main'),
]
for interp, other, extra in interpreters:
for creator in ('same', 'other', 'creator'):
for end in ('send', 'recv'):
yield ChannelCloseFixture(end, interp, other, extra, creator)
def _close(self, fix, *, force):
op = 'force-close' if force else 'close'
close = ChannelAction(op, fix.end, 'same')
if not fix.expect_closed_error():
self.run_action(fix, close, hideclosed=False)
else:
with self.assertRaises(interpreters.ChannelClosedError):
self.run_action(fix, close, hideclosed=False)
def _assert_closed_in_interp(self, fix, interp=None):
if interp is None or interp.name == 'main':
with self.assertRaises(interpreters.ChannelClosedError):
interpreters.channel_recv(fix.cid)
with self.assertRaises(interpreters.ChannelClosedError):
interpreters.channel_send(fix.cid, b'spam')
with self.assertRaises(interpreters.ChannelClosedError):
interpreters.channel_close(fix.cid)
with self.assertRaises(interpreters.ChannelClosedError):
interpreters.channel_close(fix.cid, force=True)
else:
run_interp(interp.id, f"""
with helpers.expect_channel_closed():
interpreters.channel_recv(cid)
""")
run_interp(interp.id, f"""
with helpers.expect_channel_closed():
interpreters.channel_send(cid, b'spam')
""")
run_interp(interp.id, f"""
with helpers.expect_channel_closed():
interpreters.channel_close(cid)
""")
run_interp(interp.id, f"""
with helpers.expect_channel_closed():
interpreters.channel_close(cid, force=True)
""")
def _assert_closed(self, fix):
self.assertTrue(fix.state.closed)
for _ in range(fix.state.pending):
interpreters.channel_recv(fix.cid)
self._assert_closed_in_interp(fix)
for interp in ('same', 'other'):
interp = fix.get_interpreter(interp)
if interp.name == 'main':
continue
self._assert_closed_in_interp(fix, interp)
interp = fix.get_interpreter('fresh')
self._assert_closed_in_interp(fix, interp)
def _iter_close_tests(self, verbose=False):
i = 0
for actions in self.iter_action_sets():
print()
for fix in self.iter_fixtures():
i += 1
if i > 1000:
return
if verbose:
if (i - 1) % 6 == 0:
print()
print(i, fix, '({} actions)'.format(len(actions)))
else:
if (i - 1) % 6 == 0:
print(' ', end='')
print('.', end=''); sys.stdout.flush()
yield i, fix, actions
if verbose:
print('---')
print()
# This is useful for scanning through the possible tests.
def _skim_close_tests(self):
ChannelCloseFixture.QUICK = True
for i, fix, actions in self._iter_close_tests():
pass
def test_close(self):
for i, fix, actions in self._iter_close_tests():
with self.subTest('{} {} {}'.format(i, fix, actions)):
fix.prep_interpreter(fix.interp)
self.run_actions(fix, actions)
self._close(fix, force=False)
self._assert_closed(fix)
# XXX Things slow down if we have too many interpreters.
fix.clean_up()
def test_force_close(self):
for i, fix, actions in self._iter_close_tests():
with self.subTest('{} {} {}'.format(i, fix, actions)):
fix.prep_interpreter(fix.interp)
self.run_actions(fix, actions)
self._close(fix, force=True)
self._assert_closed(fix)
# XXX Things slow down if we have too many interpreters.
fix.clean_up()
if __name__ == '__main__':
unittest.main()
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