@Test public void popularTracks() {

  media.popularTracks(URL, "libKey", "artistKey");
  assertThat(api.actual, is("https://plex.tv/library/sections/libKey/all?group=title&limit=5" +
      "&ratingCount%3E=1&sort=ratingCount:desc&type=10&artist.id=artistKey&X-Plex-Token=token"));
}