def METHOD_NAME(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"']
    for t in timevalues:
        imaplib.Time2Internaldate(t)