'Tests downloading a zero-length object (exercises boundary conditions).'

def test_zero_length_object_download(self):

    res_download_handler = ResumableDownloadHandler()
    dst_fp = self.make_dst_fp()
    k = self._MakeKey()
    k.get_contents_to_file(dst_fp, res_download_handler=res_download_handler)
    self.assertEqual(0, get_cur_file_size(dst_fp))
