@Test
 public void nullServiceWhenAuthenticateAllTokens() throws Exception {
   ServiceProperties sp = new ServiceProperties();
   sp.setAuthenticateAllArtifacts(true);
   try {
     sp.afterPropertiesSet();
     fail("Expected Exception");
   } catch (IllegalArgumentException success) {
   }
   sp.setAuthenticateAllArtifacts(false);
   try {
     sp.afterPropertiesSet();
     fail("Expected Exception");
   } catch (IllegalArgumentException success) {
   }
 }