mirror of https://github.com/python/cpython
773 lines
23 KiB
Python
773 lines
23 KiB
Python
import contextlib
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import os
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import threading
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from textwrap import dedent
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import unittest
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import time
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from test import support
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from test.support import import_helper
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from test.support import threading_helper
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_interpreters = import_helper.import_module('_xxsubinterpreters')
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_channels = import_helper.import_module('_xxinterpchannels')
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from test.support import interpreters
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def _captured_script(script):
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r, w = os.pipe()
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indented = script.replace('\n', '\n ')
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wrapped = dedent(f"""
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import contextlib
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with open({w}, 'w', encoding='utf-8') as spipe:
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with contextlib.redirect_stdout(spipe):
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{indented}
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""")
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return wrapped, open(r, encoding='utf-8')
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def clean_up_interpreters():
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for interp in interpreters.list_all():
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if interp.id == 0: # main
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continue
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try:
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interp.close()
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except RuntimeError:
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pass # already destroyed
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def _run_output(interp, request, channels=None):
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script, rpipe = _captured_script(request)
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with rpipe:
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interp.run(script, channels=channels)
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return rpipe.read()
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@contextlib.contextmanager
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def _running(interp):
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r, w = os.pipe()
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def run():
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interp.run(dedent(f"""
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# wait for "signal"
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with open({r}) as rpipe:
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rpipe.read()
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"""))
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t = threading.Thread(target=run)
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t.start()
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yield
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with open(w, 'w') as spipe:
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spipe.write('done')
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t.join()
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class TestBase(unittest.TestCase):
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def tearDown(self):
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clean_up_interpreters()
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class CreateTests(TestBase):
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def test_in_main(self):
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interp = interpreters.create()
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self.assertIsInstance(interp, interpreters.Interpreter)
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self.assertIn(interp, interpreters.list_all())
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def test_in_thread(self):
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lock = threading.Lock()
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interp = None
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def f():
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nonlocal interp
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interp = interpreters.create()
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lock.acquire()
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lock.release()
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t = threading.Thread(target=f)
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with lock:
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t.start()
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t.join()
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self.assertIn(interp, interpreters.list_all())
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def test_in_subinterpreter(self):
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main, = interpreters.list_all()
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interp = interpreters.create()
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out = _run_output(interp, dedent("""
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from test.support import interpreters
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interp = interpreters.create()
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print(interp.id)
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"""))
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interp2 = interpreters.Interpreter(int(out))
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self.assertEqual(interpreters.list_all(), [main, interp, interp2])
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def test_after_destroy_all(self):
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before = set(interpreters.list_all())
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# Create 3 subinterpreters.
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interp_lst = []
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for _ in range(3):
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interps = interpreters.create()
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interp_lst.append(interps)
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# Now destroy them.
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for interp in interp_lst:
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interp.close()
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# Finally, create another.
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interp = interpreters.create()
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self.assertEqual(set(interpreters.list_all()), before | {interp})
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def test_after_destroy_some(self):
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before = set(interpreters.list_all())
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# Create 3 subinterpreters.
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interp1 = interpreters.create()
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interp2 = interpreters.create()
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interp3 = interpreters.create()
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# Now destroy 2 of them.
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interp1.close()
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interp2.close()
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# Finally, create another.
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interp = interpreters.create()
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self.assertEqual(set(interpreters.list_all()), before | {interp3, interp})
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class GetCurrentTests(TestBase):
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def test_main(self):
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main = interpreters.get_main()
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current = interpreters.get_current()
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self.assertEqual(current, main)
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def test_subinterpreter(self):
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main = _interpreters.get_main()
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interp = interpreters.create()
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out = _run_output(interp, dedent("""
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from test.support import interpreters
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cur = interpreters.get_current()
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print(cur.id)
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"""))
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current = interpreters.Interpreter(int(out))
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self.assertNotEqual(current, main)
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class ListAllTests(TestBase):
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def test_initial(self):
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interps = interpreters.list_all()
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self.assertEqual(1, len(interps))
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def test_after_creating(self):
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main = interpreters.get_current()
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first = interpreters.create()
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second = interpreters.create()
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ids = []
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for interp in interpreters.list_all():
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ids.append(interp.id)
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self.assertEqual(ids, [main.id, first.id, second.id])
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def test_after_destroying(self):
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main = interpreters.get_current()
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first = interpreters.create()
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second = interpreters.create()
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first.close()
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ids = []
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for interp in interpreters.list_all():
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ids.append(interp.id)
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self.assertEqual(ids, [main.id, second.id])
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class TestInterpreterAttrs(TestBase):
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def test_id_type(self):
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main = interpreters.get_main()
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current = interpreters.get_current()
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interp = interpreters.create()
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self.assertIsInstance(main.id, _interpreters.InterpreterID)
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self.assertIsInstance(current.id, _interpreters.InterpreterID)
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self.assertIsInstance(interp.id, _interpreters.InterpreterID)
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def test_main_id(self):
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main = interpreters.get_main()
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self.assertEqual(main.id, 0)
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def test_custom_id(self):
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interp = interpreters.Interpreter(1)
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self.assertEqual(interp.id, 1)
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with self.assertRaises(TypeError):
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interpreters.Interpreter('1')
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def test_id_readonly(self):
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interp = interpreters.Interpreter(1)
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with self.assertRaises(AttributeError):
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interp.id = 2
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@unittest.skip('not ready yet (see bpo-32604)')
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def test_main_isolated(self):
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main = interpreters.get_main()
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self.assertFalse(main.isolated)
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@unittest.skip('not ready yet (see bpo-32604)')
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def test_subinterpreter_isolated_default(self):
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interp = interpreters.create()
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self.assertFalse(interp.isolated)
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def test_subinterpreter_isolated_explicit(self):
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interp1 = interpreters.create(isolated=True)
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interp2 = interpreters.create(isolated=False)
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self.assertTrue(interp1.isolated)
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self.assertFalse(interp2.isolated)
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@unittest.skip('not ready yet (see bpo-32604)')
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def test_custom_isolated_default(self):
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interp = interpreters.Interpreter(1)
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self.assertFalse(interp.isolated)
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def test_custom_isolated_explicit(self):
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interp1 = interpreters.Interpreter(1, isolated=True)
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interp2 = interpreters.Interpreter(1, isolated=False)
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self.assertTrue(interp1.isolated)
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self.assertFalse(interp2.isolated)
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def test_isolated_readonly(self):
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interp = interpreters.Interpreter(1)
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with self.assertRaises(AttributeError):
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interp.isolated = True
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def test_equality(self):
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interp1 = interpreters.create()
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interp2 = interpreters.create()
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self.assertEqual(interp1, interp1)
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self.assertNotEqual(interp1, interp2)
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class TestInterpreterIsRunning(TestBase):
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def test_main(self):
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main = interpreters.get_main()
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self.assertTrue(main.is_running())
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@unittest.skip('Fails on FreeBSD')
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def test_subinterpreter(self):
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interp = interpreters.create()
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self.assertFalse(interp.is_running())
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with _running(interp):
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self.assertTrue(interp.is_running())
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self.assertFalse(interp.is_running())
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def test_from_subinterpreter(self):
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interp = interpreters.create()
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out = _run_output(interp, dedent(f"""
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import _xxsubinterpreters as _interpreters
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if _interpreters.is_running({interp.id}):
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print(True)
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else:
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print(False)
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"""))
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self.assertEqual(out.strip(), 'True')
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def test_already_destroyed(self):
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interp = interpreters.create()
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interp.close()
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with self.assertRaises(RuntimeError):
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interp.is_running()
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def test_does_not_exist(self):
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interp = interpreters.Interpreter(1_000_000)
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with self.assertRaises(RuntimeError):
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interp.is_running()
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def test_bad_id(self):
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interp = interpreters.Interpreter(-1)
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with self.assertRaises(ValueError):
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interp.is_running()
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class TestInterpreterClose(TestBase):
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def test_basic(self):
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main = interpreters.get_main()
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interp1 = interpreters.create()
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interp2 = interpreters.create()
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interp3 = interpreters.create()
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self.assertEqual(set(interpreters.list_all()),
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{main, interp1, interp2, interp3})
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interp2.close()
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self.assertEqual(set(interpreters.list_all()),
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{main, interp1, interp3})
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def test_all(self):
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before = set(interpreters.list_all())
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interps = set()
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for _ in range(3):
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interp = interpreters.create()
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interps.add(interp)
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self.assertEqual(set(interpreters.list_all()), before | interps)
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for interp in interps:
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interp.close()
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self.assertEqual(set(interpreters.list_all()), before)
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def test_main(self):
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main, = interpreters.list_all()
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with self.assertRaises(RuntimeError):
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main.close()
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def f():
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with self.assertRaises(RuntimeError):
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main.close()
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t = threading.Thread(target=f)
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t.start()
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t.join()
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def test_already_destroyed(self):
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interp = interpreters.create()
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interp.close()
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with self.assertRaises(RuntimeError):
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interp.close()
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def test_does_not_exist(self):
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interp = interpreters.Interpreter(1_000_000)
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with self.assertRaises(RuntimeError):
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interp.close()
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def test_bad_id(self):
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interp = interpreters.Interpreter(-1)
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with self.assertRaises(ValueError):
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interp.close()
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def test_from_current(self):
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main, = interpreters.list_all()
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interp = interpreters.create()
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out = _run_output(interp, dedent(f"""
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from test.support import interpreters
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interp = interpreters.Interpreter({int(interp.id)})
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try:
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interp.close()
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except RuntimeError:
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print('failed')
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"""))
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self.assertEqual(out.strip(), 'failed')
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self.assertEqual(set(interpreters.list_all()), {main, interp})
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def test_from_sibling(self):
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main, = interpreters.list_all()
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interp1 = interpreters.create()
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interp2 = interpreters.create()
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self.assertEqual(set(interpreters.list_all()),
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{main, interp1, interp2})
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interp1.run(dedent(f"""
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from test.support import interpreters
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interp2 = interpreters.Interpreter(int({interp2.id}))
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interp2.close()
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interp3 = interpreters.create()
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interp3.close()
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"""))
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self.assertEqual(set(interpreters.list_all()), {main, interp1})
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def test_from_other_thread(self):
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interp = interpreters.create()
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def f():
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interp.close()
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t = threading.Thread(target=f)
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t.start()
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t.join()
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@unittest.skip('Fails on FreeBSD')
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def test_still_running(self):
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main, = interpreters.list_all()
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interp = interpreters.create()
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with _running(interp):
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with self.assertRaises(RuntimeError):
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interp.close()
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self.assertTrue(interp.is_running())
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class TestInterpreterRun(TestBase):
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def test_success(self):
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interp = interpreters.create()
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script, file = _captured_script('print("it worked!", end="")')
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with file:
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interp.run(script)
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out = file.read()
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self.assertEqual(out, 'it worked!')
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def test_in_thread(self):
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interp = interpreters.create()
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script, file = _captured_script('print("it worked!", end="")')
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with file:
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def f():
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interp.run(script)
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t = threading.Thread(target=f)
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t.start()
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t.join()
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out = file.read()
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self.assertEqual(out, 'it worked!')
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@support.requires_fork()
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def test_fork(self):
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interp = interpreters.create()
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import tempfile
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with tempfile.NamedTemporaryFile('w+', encoding='utf-8') as file:
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file.write('')
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file.flush()
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expected = 'spam spam spam spam spam'
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script = dedent(f"""
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import os
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try:
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os.fork()
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except RuntimeError:
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with open('{file.name}', 'w', encoding='utf-8') as out:
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out.write('{expected}')
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""")
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interp.run(script)
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file.seek(0)
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content = file.read()
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self.assertEqual(content, expected)
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@unittest.skip('Fails on FreeBSD')
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def test_already_running(self):
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interp = interpreters.create()
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with _running(interp):
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with self.assertRaises(RuntimeError):
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interp.run('print("spam")')
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def test_does_not_exist(self):
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interp = interpreters.Interpreter(1_000_000)
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with self.assertRaises(RuntimeError):
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interp.run('print("spam")')
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def test_bad_id(self):
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interp = interpreters.Interpreter(-1)
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with self.assertRaises(ValueError):
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interp.run('print("spam")')
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def test_bad_script(self):
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interp = interpreters.create()
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with self.assertRaises(TypeError):
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interp.run(10)
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def test_bytes_for_script(self):
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interp = interpreters.create()
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with self.assertRaises(TypeError):
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interp.run(b'print("spam")')
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# test_xxsubinterpreters covers the remaining Interpreter.run() behavior.
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class StressTests(TestBase):
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# In these tests we generally want a lot of interpreters,
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# but not so many that any test takes too long.
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@support.requires_resource('cpu')
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def test_create_many_sequential(self):
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alive = []
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for _ in range(100):
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interp = interpreters.create()
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alive.append(interp)
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@support.requires_resource('cpu')
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def test_create_many_threaded(self):
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alive = []
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def task():
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interp = interpreters.create()
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alive.append(interp)
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threads = (threading.Thread(target=task) for _ in range(200))
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with threading_helper.start_threads(threads):
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pass
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class TestIsShareable(TestBase):
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def test_default_shareables(self):
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shareables = [
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# singletons
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None,
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# builtin objects
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b'spam',
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'spam',
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10,
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-10,
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]
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for obj in shareables:
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with self.subTest(obj):
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shareable = interpreters.is_shareable(obj)
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self.assertTrue(shareable)
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def test_not_shareable(self):
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class Cheese:
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def __init__(self, name):
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self.name = name
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def __str__(self):
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return self.name
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class SubBytes(bytes):
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"""A subclass of a shareable type."""
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not_shareables = [
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# singletons
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True,
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False,
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NotImplemented,
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...,
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# builtin types and objects
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type,
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object,
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object(),
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Exception(),
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100.0,
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# user-defined types and objects
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Cheese,
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Cheese('Wensleydale'),
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SubBytes(b'spam'),
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]
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for obj in not_shareables:
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with self.subTest(repr(obj)):
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self.assertFalse(
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interpreters.is_shareable(obj))
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class TestChannels(TestBase):
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def test_create(self):
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r, s = interpreters.create_channel()
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self.assertIsInstance(r, interpreters.RecvChannel)
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self.assertIsInstance(s, interpreters.SendChannel)
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def test_list_all(self):
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self.assertEqual(interpreters.list_all_channels(), [])
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created = set()
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for _ in range(3):
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ch = interpreters.create_channel()
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created.add(ch)
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after = set(interpreters.list_all_channels())
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self.assertEqual(after, created)
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class TestRecvChannelAttrs(TestBase):
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def test_id_type(self):
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rch, _ = interpreters.create_channel()
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self.assertIsInstance(rch.id, _channels.ChannelID)
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def test_custom_id(self):
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rch = interpreters.RecvChannel(1)
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self.assertEqual(rch.id, 1)
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with self.assertRaises(TypeError):
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interpreters.RecvChannel('1')
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def test_id_readonly(self):
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rch = interpreters.RecvChannel(1)
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with self.assertRaises(AttributeError):
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rch.id = 2
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def test_equality(self):
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ch1, _ = interpreters.create_channel()
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ch2, _ = interpreters.create_channel()
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self.assertEqual(ch1, ch1)
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self.assertNotEqual(ch1, ch2)
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class TestSendChannelAttrs(TestBase):
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def test_id_type(self):
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_, sch = interpreters.create_channel()
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self.assertIsInstance(sch.id, _channels.ChannelID)
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def test_custom_id(self):
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sch = interpreters.SendChannel(1)
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self.assertEqual(sch.id, 1)
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with self.assertRaises(TypeError):
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interpreters.SendChannel('1')
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def test_id_readonly(self):
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sch = interpreters.SendChannel(1)
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with self.assertRaises(AttributeError):
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sch.id = 2
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def test_equality(self):
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_, ch1 = interpreters.create_channel()
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_, ch2 = interpreters.create_channel()
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self.assertEqual(ch1, ch1)
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self.assertNotEqual(ch1, ch2)
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class TestSendRecv(TestBase):
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def test_send_recv_main(self):
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r, s = interpreters.create_channel()
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orig = b'spam'
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s.send_nowait(orig)
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obj = r.recv()
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self.assertEqual(obj, orig)
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self.assertIsNot(obj, orig)
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def test_send_recv_same_interpreter(self):
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interp = interpreters.create()
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interp.run(dedent("""
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from test.support import interpreters
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r, s = interpreters.create_channel()
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orig = b'spam'
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s.send_nowait(orig)
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obj = r.recv()
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assert obj == orig, 'expected: obj == orig'
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assert obj is not orig, 'expected: obj is not orig'
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"""))
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@unittest.skip('broken (see BPO-...)')
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def test_send_recv_different_interpreters(self):
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r1, s1 = interpreters.create_channel()
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r2, s2 = interpreters.create_channel()
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orig1 = b'spam'
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s1.send_nowait(orig1)
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out = _run_output(
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interpreters.create(),
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dedent(f"""
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obj1 = r.recv()
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assert obj1 == b'spam', 'expected: obj1 == orig1'
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# When going to another interpreter we get a copy.
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assert id(obj1) != {id(orig1)}, 'expected: obj1 is not orig1'
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orig2 = b'eggs'
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print(id(orig2))
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s.send_nowait(orig2)
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"""),
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channels=dict(r=r1, s=s2),
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)
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obj2 = r2.recv()
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self.assertEqual(obj2, b'eggs')
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self.assertNotEqual(id(obj2), int(out))
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def test_send_recv_different_threads(self):
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r, s = interpreters.create_channel()
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def f():
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while True:
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try:
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obj = r.recv()
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break
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except interpreters.ChannelEmptyError:
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time.sleep(0.1)
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s.send(obj)
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t = threading.Thread(target=f)
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t.start()
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orig = b'spam'
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s.send(orig)
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t.join()
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obj = r.recv()
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self.assertEqual(obj, orig)
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self.assertIsNot(obj, orig)
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def test_send_recv_nowait_main(self):
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r, s = interpreters.create_channel()
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orig = b'spam'
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s.send_nowait(orig)
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obj = r.recv_nowait()
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self.assertEqual(obj, orig)
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self.assertIsNot(obj, orig)
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def test_send_recv_nowait_main_with_default(self):
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r, _ = interpreters.create_channel()
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obj = r.recv_nowait(None)
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self.assertIsNone(obj)
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def test_send_recv_nowait_same_interpreter(self):
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interp = interpreters.create()
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interp.run(dedent("""
|
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from test.support import interpreters
|
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r, s = interpreters.create_channel()
|
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orig = b'spam'
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s.send_nowait(orig)
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obj = r.recv_nowait()
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assert obj == orig, 'expected: obj == orig'
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# When going back to the same interpreter we get the same object.
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assert obj is not orig, 'expected: obj is not orig'
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"""))
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@unittest.skip('broken (see BPO-...)')
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def test_send_recv_nowait_different_interpreters(self):
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r1, s1 = interpreters.create_channel()
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r2, s2 = interpreters.create_channel()
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orig1 = b'spam'
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s1.send_nowait(orig1)
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out = _run_output(
|
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interpreters.create(),
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dedent(f"""
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obj1 = r.recv_nowait()
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assert obj1 == b'spam', 'expected: obj1 == orig1'
|
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# When going to another interpreter we get a copy.
|
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assert id(obj1) != {id(orig1)}, 'expected: obj1 is not orig1'
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orig2 = b'eggs'
|
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print(id(orig2))
|
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s.send_nowait(orig2)
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"""),
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channels=dict(r=r1, s=s2),
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)
|
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obj2 = r2.recv_nowait()
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self.assertEqual(obj2, b'eggs')
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self.assertNotEqual(id(obj2), int(out))
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def test_recv_channel_does_not_exist(self):
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ch = interpreters.RecvChannel(1_000_000)
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with self.assertRaises(interpreters.ChannelNotFoundError):
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ch.recv()
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def test_send_channel_does_not_exist(self):
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ch = interpreters.SendChannel(1_000_000)
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with self.assertRaises(interpreters.ChannelNotFoundError):
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ch.send(b'spam')
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def test_recv_nowait_channel_does_not_exist(self):
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ch = interpreters.RecvChannel(1_000_000)
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with self.assertRaises(interpreters.ChannelNotFoundError):
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ch.recv_nowait()
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def test_send_nowait_channel_does_not_exist(self):
|
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ch = interpreters.SendChannel(1_000_000)
|
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with self.assertRaises(interpreters.ChannelNotFoundError):
|
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ch.send_nowait(b'spam')
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def test_recv_nowait_empty(self):
|
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ch, _ = interpreters.create_channel()
|
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with self.assertRaises(interpreters.ChannelEmptyError):
|
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ch.recv_nowait()
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def test_recv_nowait_default(self):
|
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default = object()
|
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rch, sch = interpreters.create_channel()
|
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obj1 = rch.recv_nowait(default)
|
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sch.send_nowait(None)
|
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sch.send_nowait(1)
|
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sch.send_nowait(b'spam')
|
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sch.send_nowait(b'eggs')
|
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obj2 = rch.recv_nowait(default)
|
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obj3 = rch.recv_nowait(default)
|
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obj4 = rch.recv_nowait()
|
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obj5 = rch.recv_nowait(default)
|
|
obj6 = rch.recv_nowait(default)
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|
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self.assertIs(obj1, default)
|
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self.assertIs(obj2, None)
|
|
self.assertEqual(obj3, 1)
|
|
self.assertEqual(obj4, b'spam')
|
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self.assertEqual(obj5, b'eggs')
|
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self.assertIs(obj6, default)
|