classTestImaplib(unittest.TestCase):deftest_that_Time2Internaldate_returns_a_result(self):# We can check only that it successfully produces a result,# not the correctness of the result itself, since the result# depends on the timezone the machine is in.timevalues=[2000000000,2000000000.0,time.localtime(2000000000),'"18-May-2033 05:33:20 +0200"']fortintimevalues:imaplib.Time2Internaldate(t)deftest_main():test_support.run_unittest(TestImaplib)if__name__=="__main__":unittest.main()