def test_sequential_ids(self):
before = interpreters.list_all_channels()
channels1 = interpreters.create_channel()
channels2 = interpreters.create_channel()
channels3 = interpreters.create_channel()
after = interpreters.list_all_channels()
self.assertEqual(len(set(after) - set(before)),
len({channels1, channels2, channels3}))
def test_send_recv_nowait_main(self):
r, s = interpreters.create_channel()
orig = b'spam'
s.send_nowait(orig)
obj = r.recv_nowait()
self.assertEqual(obj, orig)
self.assertIsNot(obj, orig)
def test_list_all(self):
self.assertEqual(interpreters.list_all_channels(), [])
created = set()
for _ in range(3):
ch = interpreters.create_channel()
created.add(ch)
after = set(interpreters.list_all_channels())
self.assertEqual(after, created)
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_recv_nowait_default(self):
default = object()
rch, sch = interpreters.create_channel()
obj1 = rch.recv_nowait(default)
sch.send_nowait(None)
sch.send_nowait(1)
sch.send_nowait(b'spam')
sch.send_nowait(b'eggs')
obj2 = rch.recv_nowait(default)
obj3 = rch.recv_nowait(default)
obj4 = rch.recv_nowait()
obj5 = rch.recv_nowait(default)
obj6 = rch.recv_nowait(default)
self.assertIs(obj1, default)
self.assertIs(obj2, None)
self.assertEqual(obj3, 1)
self.assertEqual(obj4, b'spam')
self.assertEqual(obj5, b'eggs')
self.assertIs(obj6, default)
def test_send_recv_different_threads(self):
r, s = interpreters.create_channel()
def f():
while True:
try:
obj = r.recv()
break
except interpreters.ChannelEmptyError:
time.sleep(0.1)
s.send(obj)
t = threading.Thread(target=f)
t.start()
s.send(b'spam')
t.join()
obj = r.recv()
self.assertEqual(obj, b'spam')
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_recv_nowait_empty(self):
ch, _ = interpreters.create_channel()
with self.assertRaises(interpreters.ChannelEmptyError):
ch.recv_nowait()
def test_send_recv_nowait_main_with_default(self):
r, _ = interpreters.create_channel()
obj = r.recv_nowait(None)
self.assertIsNone(obj)
def test_equality(self):
_, ch1 = interpreters.create_channel()
_, ch2 = interpreters.create_channel()
self.assertEqual(ch1, ch1)
self.assertNotEqual(ch1, ch2)
def test_id_type(self):
_, sch = interpreters.create_channel()
self.assertIsInstance(sch.id, _interpreters.ChannelID)
def test_create(self):
r, s = interpreters.create_channel()
self.assertIsInstance(r, interpreters.RecvChannel)
self.assertIsInstance(s, interpreters.SendChannel)