def METHOD_NAME():
    listdir = MockListDir(path='/etc/systemd/system', file_names=[])
    overridden = spamassassinconfigread_spamd.spamassassin_service_overriden(listdir.listdir)
    assert overridden is False
    listdir = MockListDir(path='/etc/systemd/system',
                          file_names=['foo.service', 'bar.service'])
    overridden = spamassassinconfigread_spamd.spamassassin_service_overriden(listdir.listdir)
    assert overridden is False
    assert not listdir.error