def METHOD_NAME(self):
    # copy through empty pipe
    d = 'empty pipeline test COPY'
    with open(TESTFN, 'w') as f:
        f.write(d)
    with open(TESTFN2, 'w') as f:
        f.write('')
    t=pipes.Template()
    t.copy(TESTFN, TESTFN2)
    with open(TESTFN2) as f:
        self.assertEqual(f.read(), d)