def test_appfiles_docker(self):
        """app-parameter is ignored in Docker"""
        c = copy(src=['a1', 'a2', 'a3'], dest='b', _app='foo')
        self.assertEqual(str(c), 'COPY a1 \\\n    a2 \\\n    a3 \\\n    b/')
app-parameter is ignored in Docker
test/test_copy.py