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//usr/lib/python2.4/test/test_threadedtempfile.py
""" 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.test_support import TestFailed import StringIO from traceback import print_exc import tempfile startEvent = threading.Event() 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_main(): 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_main()