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"""
Create and delete FILES_PER_THREAD temp files (via tempfile.TemporaryFile)
in each of NUM_THREADS threads, recording the number of successes and
failures. A failure is a bug in tempfile, and may be due to:
+ Trying to create more than one tempfile with the same name.
+ Trying to delete a tempfile that doesn't still exist.
+ Something we've never seen before.
By default, NUM_THREADS == 20 and FILES_PER_THREAD == 50. This is enough to
create about 150 failures per run under Win98SE in 2.0, and runs pretty
quickly. Guido reports needing to boost FILES_PER_THREAD to 500 before
provoking a 2.0 failure under Linux.
"""
NUM_THREADS = 20
FILES_PER_THREAD = 50
import tempfile
from test.support import start_threads, import_module
threading = import_module('threading')
import unittest
import io
from traceback import print_exc
startEvent = threading.Event()
class TempFileGreedy(threading.Thread):
error_count = 0
ok_count = 0
def run(self):
self.errors = io.StringIO()
startEvent.wait()
for i in range(FILES_PER_THREAD):
try:
f = tempfile.TemporaryFile("w+b")
f.close()
except:
self.error_count += 1
print_exc(file=self.errors)
else:
self.ok_count += 1
class ThreadedTempFileTest(unittest.TestCase):
def test_main(self):
threads = [TempFileGreedy() for i in range(NUM_THREADS)]
with start_threads(threads, startEvent.set):
pass
ok = sum(t.ok_count for t in threads)
errors = [str(t.name) + str(t.errors.getvalue())
for t in threads if t.error_count]
msg = "Errors: errors %d ok %d\n%s" % (len(errors), ok,
'\n'.join(errors))
self.assertEqual(errors, [], msg)
self.assertEqual(ok, NUM_THREADS * FILES_PER_THREAD)
if __name__ == "__main__":
unittest.main()