def test_from_current(self):
main, = interpreters.list_all()
interp = interpreters.create()
out = _run_output(interp, dedent(f"""
from test.support import interpreters
interp = interpreters.Interpreter({int(interp.id)})
try:
interp.close()
except RuntimeError:
print('failed')
"""))
self.assertEqual(out.strip(), 'failed')
self.assertEqual(set(interpreters.list_all()), {main, interp})
def test_send_recv_nowait_same_interpreter(self):
interp = interpreters.create()
interp.run(
dedent("""
from test.support import interpreters
r, s = interpreters.create_channel()
orig = b'spam'
s.send_nowait(orig)
obj = r.recv_nowait()
assert obj == orig, 'expected: obj == orig'
# When going back to the same interpreter we get the same object.
assert obj is not orig, 'expected: obj is not orig'
"""))
def test_send_recv_same_interpreter(self):
interp = interpreters.create()
out = _run_output(
interp,
dedent("""
from test.support import interpreters
r, s = interpreters.create_channel()
orig = b'spam'
s.send(orig)
obj = r.recv()
assert obj is not orig
assert obj == orig
"""))
def test_in_thread(self):
interp = interpreters.create()
script, file = _captured_script('print("it worked!", end="")')
with file:
def f():
interp.run(script)
t = threading.Thread(target=f)
t.start()
t.join()
out = file.read()
self.assertEqual(out, 'it worked!')
def test_in_subinterpreter(self):
main, = interpreters.list_all()
interp = interpreters.create()
out = _run_output(
interp,
dedent("""
from test.support import interpreters
interp = interpreters.create()
print(interp)
"""))
interp2 = out.strip()
self.assertEqual(len(set(interpreters.list_all())),
len({main, interp, interp2}))
def test_from_current(self):
main, = interpreters.list_all()
interp = interpreters.create()
script = dedent(f"""
from test.support import interpreters
try:
main = interpreters.get_current()
main.close()
except RuntimeError:
pass
""")
interp.run(script)
self.assertEqual(len(set(interpreters.list_all())), len({main,
interp}))
def test_in_thread(self):
lock = threading.Lock()
id = None
interp = interpreters.create()
lst = interpreters.list_all()
def f():
nonlocal id
id = interp.id
lock.acquire()
lock.release()
t = threading.Thread(target=f)
with lock:
t.start()
t.join()
self.assertEqual(interp.id, lst[1].id)
def test_fork(self):
interp = interpreters.create()
import tempfile
with tempfile.NamedTemporaryFile('w+') as file:
file.write('')
file.flush()
expected = 'spam spam spam spam spam'
script = dedent(f"""
import os
try:
os.fork()
except RuntimeError:
with open('{file.name}', 'w') as out:
out.write('{expected}')
""")
interp.run(script)
file.seek(0)
content = file.read()
self.assertEqual(content, expected)
def test_send_recv_nowait_different_interpreters(self):
r1, s1 = interpreters.create_channel()
r2, s2 = interpreters.create_channel()
orig1 = b'spam'
s1.send_nowait(orig1)
out = _run_output(
interpreters.create(),
dedent(f"""
obj1 = r.recv_nowait()
assert obj1 == b'spam', 'expected: obj1 == orig1'
# When going to another interpreter we get a copy.
assert id(obj1) != {id(orig1)}, 'expected: obj1 is not orig1'
orig2 = b'eggs'
print(id(orig2))
s.send_nowait(orig2)
"""),
channels=dict(r=r1, s=s2),
)
obj2 = r2.recv_nowait()
self.assertEqual(obj2, b'eggs')
self.assertNotEqual(id(obj2), int(out))
def test_send_recv_nowait_same_interpreter(self):
interp = interpreters.create()
out = _run_output(
interp,
dedent("""
from test.support import interpreters
r, s = interpreters.create_channel()
orig = b'spam'
s.send(orig)
obj = r.recv_nowait()
assert obj is not orig
assert obj == orig
"""))
r, s = interpreters.create_channel()
def f():
while True:
try:
obj = r.recv_nowait()
break
except _interpreters.ChannelEmptyError:
time.sleep(0.1)
s.send(obj)
def test_bytes_for_script(self):
interp = interpreters.create()
with self.assertRaises(TypeError):
interp.run(b'print("spam")')
def test_bad_script(self):
interp = interpreters.create()
with self.assertRaises(TypeError):
interp.run(10)
def test_already_running(self):
interp = interpreters.create()
with _running(interp):
with self.assertRaises(RuntimeError):
interp.run('print("spam")')
def test_already_destroyed(self):
interp = interpreters.create()
interp.close()
with self.assertRaises(RuntimeError):
interp.close()
def test_equality(self):
interp1 = interpreters.create()
interp2 = interpreters.create()
self.assertEqual(interp1, interp1)
self.assertNotEqual(interp1, interp2)
def test_subinterpreter_isolated_explicit(self):
interp1 = interpreters.create(isolated=True)
interp2 = interpreters.create(isolated=False)
self.assertTrue(interp1.isolated)
self.assertFalse(interp2.isolated)
def setUp(self):
super().setUp()
self.interp = interpreters.create()
self._fs = None
def test_in_main(self):
interp = interpreters.create()
self.assertIsInstance(interp, interpreters.Interpreter)
self.assertIn(interp, interpreters.list_all())
def test_in_main(self):
interp = interpreters.create()
lst = interpreters.list_all()
self.assertEqual(interp.id, lst[1].id)
def f():
nonlocal interp
interp = interpreters.create()
lock.acquire()
lock.release()
def test_subinterpreter_isolated_default(self):
interp = interpreters.create()
self.assertFalse(interp.isolated)