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