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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. Run the test alone to boost either
via cmdline switches:
-f FILES_PER_THREAD (int)
-t NUM_THREADS (int)
"""
NUM_THREADS = 20 # change w/ -t option
FILES_PER_THREAD = 50 # change w/ -f option
import thread # If this fails, we can't test this module
import threading
from test_support import TestFailed
import StringIO
from traceback import print_exc
startEvent = threading.Event()
import tempfile
tempfile.gettempdir() # Do this now, to avoid spurious races later
class TempFileGreedy(threading.Thread):
error_count = 0
ok_count = 0
def run(self):
self.errors = StringIO.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
def _test():
threads = []
print "Creating"
for i in range(NUM_THREADS):
t = TempFileGreedy()
threads.append(t)
t.start()
print "Starting"
startEvent.set()
print "Reaping"
ok = errors = 0
for t in threads:
t.join()
ok += t.ok_count
errors += t.error_count
if t.error_count:
print '%s errors:\n%s' % (t.getName(), t.errors.getvalue())
msg = "Done: errors %d ok %d" % (errors, ok)
print msg
if errors:
raise TestFailed(msg)
if __name__ == "__main__":
import sys, getopt
opts, args = getopt.getopt(sys.argv[1:], "t:f:")
for o, v in opts:
if o == "-f":
FILES_PER_THREAD = int(v)
elif o == "-t":
NUM_THREADS = int(v)
_test()
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