@Test
public void testAuthorship() throws Exception {

  pn.setBasionymAuthorship(Authorship.yearAuthors("1999", "Carl."));
  assertEquals("(Carl., 1999)", NameFormatter.authorshipComplete(pn));
  pn.setCombinationAuthorship(Authorship.yearAuthors("1887", "Mill."));
  assertEquals("(Carl., 1999) Mill., 1887", NameFormatter.authorshipComplete(pn));
}