@Test
public void noBody() throws Exception {

    Request request = new Request.Builder()
          .url("https://api.twitter.com/1.1/statuses/mentions_timeline.json?count=100&include_entities=false")
          .build();
    Request signed = oauth1.signRequest(request);
    assertAuthHeader(signed, "hn5jxegoQxNM6SXvQgVhK15yQL8%3D");
}