@Test public void routeBasedName_notFound() {

  when(adapter.methodFromResponse(response)).thenReturn("DELETE");
  when(adapter.route(response)).thenReturn("");
  when(adapter.statusCodeAsInt(response)).thenReturn(404);
  parser.response(adapter, response, null, customizer);
  verify(customizer).name("DELETE not_found"); // zipkin will implicitly lowercase this
}