mirror of
https://github.com/python/cpython.git
synced 2025-10-31 13:41:24 +00:00
76 lines
2 KiB
Python
76 lines
2 KiB
Python
|
import sys
|
||
|
|
import unittest
|
||
|
|
|
||
|
|
from itertools import cycle
|
||
|
|
from threading import Event, Thread
|
||
|
|
from unittest import TestCase
|
||
|
|
|
||
|
|
from test.support import threading_helper
|
||
|
|
|
||
|
|
@threading_helper.requires_working_threading()
|
||
|
|
class TestStr(TestCase):
|
||
|
|
def test_racing_join_extend(self):
|
||
|
|
'''Test joining a string being extended by another thread'''
|
||
|
|
l = []
|
||
|
|
ITERS = 100
|
||
|
|
READERS = 10
|
||
|
|
done_event = Event()
|
||
|
|
def writer_func():
|
||
|
|
for i in range(ITERS):
|
||
|
|
l.extend(map(str, range(i)))
|
||
|
|
l.clear()
|
||
|
|
done_event.set()
|
||
|
|
def reader_func():
|
||
|
|
while not done_event.is_set():
|
||
|
|
''.join(l)
|
||
|
|
writer = Thread(target=writer_func)
|
||
|
|
readers = []
|
||
|
|
for x in range(READERS):
|
||
|
|
reader = Thread(target=reader_func)
|
||
|
|
readers.append(reader)
|
||
|
|
reader.start()
|
||
|
|
|
||
|
|
writer.start()
|
||
|
|
writer.join()
|
||
|
|
for reader in readers:
|
||
|
|
reader.join()
|
||
|
|
|
||
|
|
def test_racing_join_replace(self):
|
||
|
|
'''
|
||
|
|
Test joining a string of characters being replaced with ephemeral
|
||
|
|
strings by another thread.
|
||
|
|
'''
|
||
|
|
l = [*'abcdefg']
|
||
|
|
MAX_ORDINAL = 1_000
|
||
|
|
READERS = 10
|
||
|
|
done_event = Event()
|
||
|
|
|
||
|
|
def writer_func():
|
||
|
|
for i, c in zip(cycle(range(len(l))),
|
||
|
|
map(chr, range(128, MAX_ORDINAL))):
|
||
|
|
l[i] = c
|
||
|
|
done_event.set()
|
||
|
|
|
||
|
|
def reader_func():
|
||
|
|
while not done_event.is_set():
|
||
|
|
''.join(l)
|
||
|
|
''.join(l)
|
||
|
|
''.join(l)
|
||
|
|
''.join(l)
|
||
|
|
|
||
|
|
writer = Thread(target=writer_func)
|
||
|
|
readers = []
|
||
|
|
for x in range(READERS):
|
||
|
|
reader = Thread(target=reader_func)
|
||
|
|
readers.append(reader)
|
||
|
|
reader.start()
|
||
|
|
|
||
|
|
writer.start()
|
||
|
|
writer.join()
|
||
|
|
for reader in readers:
|
||
|
|
reader.join()
|
||
|
|
|
||
|
|
|
||
|
|
if __name__ == "__main__":
|
||
|
|
unittest.main()
|