@Test
 public void testRepositories() {
   RuntimeEnvironment instance = RuntimeEnvironment.getInstance();
   assertNotNull(instance.getRepositories());
   instance.setRepositories(null);
   assertNull(instance.getRepositories());
   List<RepositoryInfo> reps = new ArrayList<RepositoryInfo>();
   instance.setRepositories(reps);
   assertSame(reps, instance.getRepositories());
 }