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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 import threading import time import unittest from test import support from test.support import import_helper from test.support import script_helper interpreters = import_helper.import_module('_xxsubinterpreters') ################################## # helpers def _captured_script(script): r, w = os.pipe() indented = script.replace('\n', '\n ') wrapped = dedent(f""" import contextlib with open({w}, 'w', encoding="utf-8") as spipe: with contextlib.redirect_stdout(spipe): {indented} """) return wrapped, open(r, encoding="utf-8") def _run_output(interp, request, shared=None): script, rpipe = _captured_script(request) with rpipe: interpreters.run_string(interp, script, shared) return rpipe.read() def _wait_for_interp_to_run(interp, timeout=None): # bpo-37224: Running this test file in multiprocesses will fail randomly. # The failure reason is that the thread can't acquire the cpu to # run subinterpreter eariler than the main thread in multiprocess. if timeout is None: timeout = support.SHORT_TIMEOUT start_time = time.monotonic() deadline = start_time + timeout while not interpreters.is_running(interp): if time.monotonic() > deadline: raise RuntimeError('interp is not running') time.sleep(0.010) @contextlib.contextmanager def _running(interp): r, w = os.pipe() def run(): interpreters.run_string(interp, dedent(f""" # wait for "signal" with open({r}, encoding="utf-8") as rpipe: rpipe.read() """)) t = threading.Thread(target=run) t.start() _wait_for_interp_to_run(interp) yield with open(w, 'w', encoding="utf-8") 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) 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_strs(self): self._assert_values(['hello world', '你好世界', '']) 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)) @unittest.skip('Fails on FreeBSD') 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(ValueError): 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): class Int(str): def __index__(self): return 10 id = interpreters.InterpreterID(Int(), force=True) self.assertEqual(int(id), 10) def test_bad_id(self): self.assertRaises(TypeError, interpreters.InterpreterID, object()) self.assertRaises(TypeError, interpreters.InterpreterID, 10.0) self.assertRaises(TypeError, interpreters.InterpreterID, '10') self.assertRaises(TypeError, interpreters.InterpreterID, b'10') self.assertRaises(ValueError, interpreters.InterpreterID, -1) self.assertRaises(OverflowError, interpreters.InterpreterID, 2**64) 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.assertTrue(int(id1) == id1) self.assertTrue(id1 == float(int(id1))) self.assertTrue(float(int(id1)) == id1) self.assertFalse(id1 == float(int(id1)) + 0.1) self.assertFalse(id1 == str(int(id1))) self.assertFalse(id1 == 2**1000) self.assertFalse(id1 == float('inf')) self.assertFalse(id1 == 'spam') 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(ValueError): 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): self.assertTrue(interpreters.is_running(interp), msg=f"Interp {interp} should be running before destruction.") with self.assertRaises(RuntimeError, msg=f"Should not be able to destroy interp {interp} while it's still running."): interpreters.destroy(interp) self.assertTrue(interpreters.is_running(interp)) class RunStringTests(TestBase): def setUp(self): super().setUp() self.id = interpreters.create() 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): subinterp = interpreters.create(isolated=False) 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(subinterp, 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+', encoding="utf-8") 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', encoding='utf-8') 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(ValueError): 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): class Int(str): def __index__(self): return 10 cid = interpreters._channel_id(Int(), force=True) self.assertEqual(int(cid), 10) def test_bad_id(self): self.assertRaises(TypeError, interpreters._channel_id, object()) self.assertRaises(TypeError, interpreters._channel_id, 10.0) self.assertRaises(TypeError, interpreters._channel_id, '10') self.assertRaises(TypeError, interpreters._channel_id, b'10') self.assertRaises(ValueError, interpreters._channel_id, -1) self.assertRaises(OverflowError, interpreters._channel_id, 2**64) 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.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) 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_channel_list_interpreters_none(self): """Test listing interpreters for a channel with no associations.""" # Test for channel with no associated interpreters. cid = interpreters.channel_create() send_interps = interpreters.channel_list_interpreters(cid, send=True) recv_interps = interpreters.channel_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 = interpreters.channel_create() interpreters.channel_send(cid, "send") # Test for a channel that has one end associated to an interpreter. send_interps = interpreters.channel_list_interpreters(cid, send=True) recv_interps = interpreters.channel_list_interpreters(cid, send=False) self.assertEqual(send_interps, [interp0]) self.assertEqual(recv_interps, []) interp1 = interpreters.create() _run_output(interp1, dedent(f""" import _xxsubinterpreters as _interpreters obj = _interpreters.channel_recv({cid}) """)) # Test for channel that has both ends associated to an interpreter. send_interps = interpreters.channel_list_interpreters(cid, send=True) recv_interps = interpreters.channel_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 = interpreters.channel_create() interpreters.channel_send(cid, "send") _run_output(interp1, dedent(f""" import _xxsubinterpreters as _interpreters _interpreters.channel_send({cid}, "send") """)) _run_output(interp2, dedent(f""" import _xxsubinterpreters as _interpreters obj = _interpreters.channel_recv({cid}) """)) _run_output(interp3, dedent(f""" import _xxsubinterpreters as _interpreters obj = _interpreters.channel_recv({cid}) """)) send_interps = interpreters.channel_list_interpreters(cid, send=True) recv_interps = interpreters.channel_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 = interpreters.channel_create() interpreters.channel_send(cid, "send") _run_output(interp1, dedent(f""" import _xxsubinterpreters as _interpreters obj = _interpreters.channel_recv({cid}) """)) # Should be one interpreter associated with each end. send_interps = interpreters.channel_list_interpreters(cid, send=True) recv_interps = interpreters.channel_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 = interpreters.channel_list_interpreters(cid, send=True) recv_interps = interpreters.channel_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 = interpreters.channel_create() interpreters.channel_send(cid, "data") _run_output(interp1, dedent(f""" import _xxsubinterpreters as _interpreters obj = _interpreters.channel_recv({cid}) """)) interpreters.channel_send(cid, "data") _run_output(interp2, dedent(f""" import _xxsubinterpreters as _interpreters obj = _interpreters.channel_recv({cid}) """)) # Check the setup. send_interps = interpreters.channel_list_interpreters(cid, send=True) recv_interps = interpreters.channel_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. interpreters.channel_release(cid, send=True) # Send end should have no associated interpreters. send_interps = interpreters.channel_list_interpreters(cid, send=True) recv_interps = interpreters.channel_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 _xxsubinterpreters as _interpreters _interpreters.channel_release({cid}) """)) # Receive end should have the released interpreter removed. send_interps = interpreters.channel_list_interpreters(cid, send=True) recv_interps = interpreters.channel_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 = interpreters.channel_create() # Put something in the channel so that it's not empty. interpreters.channel_send(cid, "send") # Check initial state. send_interps = interpreters.channel_list_interpreters(cid, send=True) recv_interps = interpreters.channel_list_interpreters(cid, send=False) self.assertEqual(len(send_interps), 1) self.assertEqual(len(recv_interps), 0) # Force close the channel. interpreters.channel_close(cid, force=True) # Both ends should raise an error. with self.assertRaises(interpreters.ChannelClosedError): interpreters.channel_list_interpreters(cid, send=True) with self.assertRaises(interpreters.ChannelClosedError): interpreters.channel_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 = interpreters.channel_create() # Put something in the channel so that it's not empty. interpreters.channel_send(cid, "send") # Check initial state. send_interps = interpreters.channel_list_interpreters(cid, send=True) recv_interps = interpreters.channel_list_interpreters(cid, send=False) self.assertEqual(len(send_interps), 1) self.assertEqual(len(recv_interps), 0) # Close the send end of the channel. interpreters.channel_close(cid, send=True) # Send end should raise an error. with self.assertRaises(interpreters.ChannelClosedError): interpreters.channel_list_interpreters(cid, send=True) # Receive end should not be closed (since channel is not empty). recv_interps = interpreters.channel_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 _xxsubinterpreters as _interpreters _interpreters.channel_close({cid}, force=True) """)) # Both ends should raise an error. with self.assertRaises(interpreters.ChannelClosedError): interpreters.channel_list_interpreters(cid, send=True) with self.assertRaises(interpreters.ChannelClosedError): interpreters.channel_list_interpreters(cid, send=False) #################### 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_recv_default(self): default = object() cid = interpreters.channel_create() obj1 = interpreters.channel_recv(cid, default) interpreters.channel_send(cid, None) interpreters.channel_send(cid, 1) interpreters.channel_send(cid, b'spam') interpreters.channel_send(cid, b'eggs') obj2 = interpreters.channel_recv(cid, default) obj3 = interpreters.channel_recv(cid, default) obj4 = interpreters.channel_recv(cid) obj5 = interpreters.channel_recv(cid, default) obj6 = interpreters.channel_recv(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_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) def test_channel_list_interpreters_invalid_channel(self): cid = interpreters.channel_create() # Test for invalid channel ID. with self.assertRaises(interpreters.ChannelNotFoundError): interpreters.channel_list_interpreters(1000, send=True) interpreters.channel_close(cid) # Test for a channel that has been closed. with self.assertRaises(interpreters.ChannelClosedError): interpreters.channel_list_interpreters(cid, send=True) def test_channel_list_interpreters_invalid_args(self): # Tests for invalid arguments passed to the API. cid = interpreters.channel_create() with self.assertRaises(TypeError): interpreters.channel_list_interpreters(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()