@Test public void parseClientIpAndPort_acceptsRemoteAddr() {

  when(request.getRemoteAddr()).thenReturn("1.2.3.4");
  when(request.getRemotePort()).thenReturn(61687);
  wrapper.parseClientIpAndPort(span);
  verify(span).remoteIpAndPort("1.2.3.4", 61687);
  verifyNoMoreInteractions(span);
}