@Test
 public void testPreloadedProperties() {
   // Don't allow "all" and "some" preloaded properties.
   AccumuloGraphConfiguration conf = new AccumuloGraphConfiguration();
   conf.setPreloadAllProperties(true);
   conf.setPreloadedProperties(new String[] {"one", "two", "three"});
   try {
     conf.validate();
     fail();
   } catch (Exception e) {
   }
 }
  @Test
  public void testInvalidCacheParams() throws Exception {
    int size = 100;
    int timeout = 30000;

    AccumuloGraphConfiguration cfg = AccumuloGraphTestUtils.generateGraphConfig("cacheParams");
    cfg.validate();

    // Vertex cache.

    assertFalse(cfg.getVertexCacheEnabled());

    try {
      cfg.setVertexCacheParams(-1, timeout);
      fail();
    } catch (Exception e) {
    }

    try {
      cfg.setVertexCacheParams(size, -1);
      fail();
    } catch (Exception e) {
    }

    assertFalse(cfg.getVertexCacheEnabled());

    cfg.setVertexCacheParams(size, timeout);
    cfg.validate();
    assertTrue(cfg.getVertexCacheEnabled());
    assertEquals(size, cfg.getVertexCacheSize());
    assertEquals(timeout, cfg.getVertexCacheTimeout());

    cfg.setVertexCacheParams(-1, -1);
    cfg.validate();
    assertFalse(cfg.getVertexCacheEnabled());

    // Edge cache.

    assertFalse(cfg.getEdgeCacheEnabled());

    try {
      cfg.setEdgeCacheParams(-1, timeout);
      fail();
    } catch (Exception e) {
    }

    try {
      cfg.setEdgeCacheParams(size, -1);
      fail();
    } catch (Exception e) {
    }

    assertFalse(cfg.getEdgeCacheEnabled());

    cfg.setEdgeCacheParams(size, timeout);
    cfg.validate();
    assertTrue(cfg.getEdgeCacheEnabled());
    assertEquals(size, cfg.getEdgeCacheSize());
    assertEquals(timeout, cfg.getEdgeCacheTimeout());

    cfg.setEdgeCacheParams(-1, -1);
    cfg.validate();
    assertFalse(cfg.getEdgeCacheEnabled());
  }