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import unittest
import test.test_support
mutex = test.test_support.import_module("mutex", deprecated=True)
class MutexTest(unittest.TestCase):
def test_lock_and_unlock(self):
def called_by_mutex(some_data):
self.assertEqual(some_data, "spam")
self.assertTrue(m.test(), "mutex not held")
# Nested locking
m.lock(called_by_mutex2, "eggs")
def called_by_mutex2(some_data):
self.assertEqual(some_data, "eggs")
self.assertTrue(m.test(), "mutex not held")
self.assertTrue(ready_for_2,
"called_by_mutex2 called too soon")
m = mutex.mutex()
read_for_2 = False
m.lock(called_by_mutex, "spam")
ready_for_2 = True
# unlock both locks
m.unlock()
m.unlock()
self.assertFalse(m.test(), "mutex still held")
def test_main():
test.test_support.run_unittest(MutexTest)
if __name__ == "__main__":
test_main()
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