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When an exception is uncaught in Interpreter.exec_sync(), it helps to show that exception's error display if uncaught in the calling interpreter. We do so here by generating a TracebackException in the subinterpreter and passing it between interpreters using pickle.
747 lines
22 KiB
Python
747 lines
22 KiB
Python
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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from test import support
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from test.support import import_helper
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# Raise SkipTest if subinterpreters not supported.
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import_helper.import_module('_xxsubinterpreters')
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from test.support import interpreters
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from test.support.interpreters import InterpreterNotFoundError
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from .utils import _captured_script, _run_output, _running, TestBase
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class ModuleTests(TestBase):
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def test_queue_aliases(self):
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first = [
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interpreters.create_queue,
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interpreters.Queue,
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interpreters.QueueEmpty,
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interpreters.QueueFull,
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]
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second = [
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interpreters.create_queue,
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interpreters.Queue,
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interpreters.QueueEmpty,
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interpreters.QueueFull,
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]
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self.assertEqual(second, first)
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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 GetMainTests(TestBase):
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def test_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_current(self):
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main = interpreters.get_main()
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current = interpreters.get_current()
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self.assertIs(main, current)
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def test_idempotent(self):
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main1 = interpreters.get_main()
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main2 = interpreters.get_main()
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self.assertIs(main1, main2)
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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.assertEqual(current, interp)
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self.assertNotEqual(current, main)
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def test_idempotent(self):
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with self.subTest('main'):
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cur1 = interpreters.get_current()
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cur2 = interpreters.get_current()
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self.assertIs(cur1, cur2)
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with self.subTest('subinterpreter'):
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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(id(cur))
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cur = interpreters.get_current()
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print(id(cur))
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"""))
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objid1, objid2 = (int(v) for v in out.splitlines())
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self.assertEqual(objid1, objid2)
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with self.subTest('per-interpreter'):
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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(id(cur))
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"""))
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id1 = int(out)
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id2 = id(interp)
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self.assertNotEqual(id1, id2)
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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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def test_idempotent(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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expected = [main, first, second]
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actual = interpreters.list_all()
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self.assertEqual(actual, expected)
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for interp1, interp2 in zip(actual, expected):
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self.assertIs(interp1, interp2)
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class InterpreterObjectTests(TestBase):
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def test_init_int(self):
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interpid = interpreters.get_current().id
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interp = interpreters.Interpreter(interpid)
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self.assertEqual(interp.id, interpid)
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def test_init_interpreter_id(self):
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interpid = interpreters.get_current()._id
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interp = interpreters.Interpreter(interpid)
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self.assertEqual(interp._id, interpid)
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def test_init_unsupported(self):
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actualid = interpreters.get_current().id
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for interpid in [
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str(actualid),
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float(actualid),
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object(),
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None,
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'',
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]:
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with self.subTest(repr(interpid)):
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with self.assertRaises(TypeError):
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interpreters.Interpreter(interpid)
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def test_idempotent(self):
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main = interpreters.get_main()
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interp = interpreters.Interpreter(main.id)
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self.assertIs(interp, main)
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def test_init_does_not_exist(self):
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with self.assertRaises(InterpreterNotFoundError):
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interpreters.Interpreter(1_000_000)
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def test_init_bad_id(self):
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with self.assertRaises(ValueError):
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interpreters.Interpreter(-1)
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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, int)
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self.assertIsInstance(current.id, int)
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self.assertIsInstance(interp.id, int)
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def test_id_readonly(self):
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interp = interpreters.create()
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with self.assertRaises(AttributeError):
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interp.id = 1_000_000
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def test_hashable(self):
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interp = interpreters.create()
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expected = hash(interp.id)
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actual = hash(interp)
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self.assertEqual(actual, expected)
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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_finished(self):
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r, w = self.pipe()
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interp = interpreters.create()
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interp.exec_sync(f"""if True:
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import os
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os.write({w}, b'x')
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""")
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self.assertFalse(interp.is_running())
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self.assertEqual(os.read(r, 1), b'x')
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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(InterpreterNotFoundError):
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interp.is_running()
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def test_with_only_background_threads(self):
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r_interp, w_interp = self.pipe()
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r_thread, w_thread = self.pipe()
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DONE = b'D'
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FINISHED = b'F'
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interp = interpreters.create()
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interp.exec_sync(f"""if True:
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import os
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import threading
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def task():
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v = os.read({r_thread}, 1)
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assert v == {DONE!r}
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os.write({w_interp}, {FINISHED!r})
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t = threading.Thread(target=task)
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t.start()
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""")
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self.assertFalse(interp.is_running())
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os.write(w_thread, DONE)
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interp.exec_sync('t.join()')
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self.assertEqual(os.read(r_interp, 1), FINISHED)
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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(InterpreterNotFoundError):
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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({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.exec_sync(dedent(f"""
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from test.support import interpreters
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interp2 = interpreters.Interpreter({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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def test_subthreads_still_running(self):
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r_interp, w_interp = self.pipe()
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r_thread, w_thread = self.pipe()
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FINISHED = b'F'
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interp = interpreters.create()
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interp.exec_sync(f"""if True:
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import os
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import threading
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import time
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done = False
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def notify_fini():
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global done
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done = True
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t.join()
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threading._register_atexit(notify_fini)
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def task():
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while not done:
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time.sleep(0.1)
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os.write({w_interp}, {FINISHED!r})
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t = threading.Thread(target=task)
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t.start()
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""")
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interp.close()
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self.assertEqual(os.read(r_interp, 1), FINISHED)
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|
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class TestInterpreterPrepareMain(TestBase):
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def test_empty(self):
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interp = interpreters.create()
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with self.assertRaises(ValueError):
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interp.prepare_main()
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def test_dict(self):
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values = {'spam': 42, 'eggs': 'ham'}
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interp = interpreters.create()
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interp.prepare_main(values)
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out = _run_output(interp, dedent("""
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print(spam, eggs)
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"""))
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self.assertEqual(out.strip(), '42 ham')
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def test_tuple(self):
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values = {'spam': 42, 'eggs': 'ham'}
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values = tuple(values.items())
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interp = interpreters.create()
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interp.prepare_main(values)
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out = _run_output(interp, dedent("""
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print(spam, eggs)
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"""))
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self.assertEqual(out.strip(), '42 ham')
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def test_kwargs(self):
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values = {'spam': 42, 'eggs': 'ham'}
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interp = interpreters.create()
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interp.prepare_main(**values)
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out = _run_output(interp, dedent("""
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print(spam, eggs)
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"""))
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self.assertEqual(out.strip(), '42 ham')
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def test_dict_and_kwargs(self):
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values = {'spam': 42, 'eggs': 'ham'}
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interp = interpreters.create()
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interp.prepare_main(values, foo='bar')
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out = _run_output(interp, dedent("""
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print(spam, eggs, foo)
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"""))
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self.assertEqual(out.strip(), '42 ham bar')
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def test_not_shareable(self):
|
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interp = interpreters.create()
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# XXX TypeError?
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with self.assertRaises(ValueError):
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interp.prepare_main(spam={'spam': 'eggs', 'foo': 'bar'})
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# Make sure neither was actually bound.
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with self.assertRaises(interpreters.ExecFailure):
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interp.exec_sync('print(foo)')
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with self.assertRaises(interpreters.ExecFailure):
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interp.exec_sync('print(spam)')
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|
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class TestInterpreterExecSync(TestBase):
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|
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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.exec_sync(script)
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out = file.read()
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self.assertEqual(out, 'it worked!')
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def test_failure(self):
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interp = interpreters.create()
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with self.assertRaises(interpreters.ExecFailure):
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interp.exec_sync('raise Exception')
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def test_display_preserved_exception(self):
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tempdir = self.temp_dir()
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modfile = self.make_module('spam', tempdir, text="""
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def ham():
|
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raise RuntimeError('uh-oh!')
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|
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def eggs():
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ham()
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""")
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scriptfile = self.make_script('script.py', tempdir, text="""
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from test.support import interpreters
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def script():
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import spam
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spam.eggs()
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interp = interpreters.create()
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interp.exec_sync(script)
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""")
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stdout, stderr = self.assert_python_failure(scriptfile)
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self.maxDiff = None
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interpmod_line, = (l for l in stderr.splitlines() if ' exec_sync' in l)
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# File "{interpreters.__file__}", line 179, in exec_sync
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self.assertEqual(stderr, dedent(f"""\
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Traceback (most recent call last):
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File "{scriptfile}", line 9, in <module>
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interp.exec_sync(script)
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~~~~~~~~~~~~~~~~^^^^^^^^
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{interpmod_line.strip()}
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raise ExecFailure(excinfo)
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test.support.interpreters.ExecFailure: RuntimeError: uh-oh!
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Uncaught in the interpreter:
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Traceback (most recent call last):
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File "{scriptfile}", line 6, in script
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spam.eggs()
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~~~~~~~~~^^
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File "{modfile}", line 6, in eggs
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ham()
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~~~^^
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File "{modfile}", line 3, in ham
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raise RuntimeError('uh-oh!')
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RuntimeError: uh-oh!
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"""))
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self.assertEqual(stdout, '')
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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.exec_sync(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.exec_sync(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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|
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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.exec_sync('print("spam")')
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|
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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.exec_sync(10)
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|
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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.exec_sync(b'print("spam")')
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|
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def test_with_background_threads_still_running(self):
|
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r_interp, w_interp = self.pipe()
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r_thread, w_thread = self.pipe()
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|
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RAN = b'R'
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DONE = b'D'
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FINISHED = b'F'
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|
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interp = interpreters.create()
|
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interp.exec_sync(f"""if True:
|
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import os
|
|
import threading
|
|
|
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def task():
|
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v = os.read({r_thread}, 1)
|
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assert v == {DONE!r}
|
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os.write({w_interp}, {FINISHED!r})
|
|
t = threading.Thread(target=task)
|
|
t.start()
|
|
os.write({w_interp}, {RAN!r})
|
|
""")
|
|
interp.exec_sync(f"""if True:
|
|
os.write({w_interp}, {RAN!r})
|
|
""")
|
|
|
|
os.write(w_thread, DONE)
|
|
interp.exec_sync('t.join()')
|
|
self.assertEqual(os.read(r_interp, 1), RAN)
|
|
self.assertEqual(os.read(r_interp, 1), RAN)
|
|
self.assertEqual(os.read(r_interp, 1), FINISHED)
|
|
|
|
# test_xxsubinterpreters covers the remaining
|
|
# Interpreter.exec_sync() behavior.
|
|
|
|
|
|
class TestInterpreterRun(TestBase):
|
|
|
|
def test_success(self):
|
|
interp = interpreters.create()
|
|
script, file = _captured_script('print("it worked!", end="")')
|
|
with file:
|
|
t = interp.run(script)
|
|
t.join()
|
|
out = file.read()
|
|
|
|
self.assertEqual(out, 'it worked!')
|
|
|
|
def test_failure(self):
|
|
caught = False
|
|
def excepthook(args):
|
|
nonlocal caught
|
|
caught = True
|
|
threading.excepthook = excepthook
|
|
try:
|
|
interp = interpreters.create()
|
|
t = interp.run('raise Exception')
|
|
t.join()
|
|
|
|
self.assertTrue(caught)
|
|
except BaseException:
|
|
threading.excepthook = threading.__excepthook__
|
|
|
|
|
|
class TestIsShareable(TestBase):
|
|
|
|
def test_default_shareables(self):
|
|
shareables = [
|
|
# singletons
|
|
None,
|
|
# builtin objects
|
|
b'spam',
|
|
'spam',
|
|
10,
|
|
-10,
|
|
True,
|
|
False,
|
|
100.0,
|
|
(),
|
|
(1, ('spam', 'eggs'), True),
|
|
]
|
|
for obj in shareables:
|
|
with self.subTest(obj):
|
|
shareable = interpreters.is_shareable(obj)
|
|
self.assertTrue(shareable)
|
|
|
|
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
|
|
NotImplemented,
|
|
...,
|
|
# builtin types and objects
|
|
type,
|
|
object,
|
|
object(),
|
|
Exception(),
|
|
# 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))
|
|
|
|
|
|
if __name__ == '__main__':
|
|
# Test needs to be a package, so we can do relative imports.
|
|
unittest.main()
|