/**
   * Checks that gets work for implicit txs.
   *
   * @param cache Cache to test.
   * @throws Exception If failed.
   */
  private void checkExplicitTx(Ignite ignite, IgniteCache<String, String> cache) throws Exception {
    IgniteCache<String, String> asyncCache = cache.withAsync();

    Transaction tx = ignite.transactions().txStart();

    try {
      assertNull(cache.get("key1"));

      tx.commit();
    } finally {
      tx.close();
    }

    tx = ignite.transactions().txStart();

    try {
      asyncCache.get("key2");

      assertNull(asyncCache.future().get());

      tx.commit();
    } finally {
      tx.close();
    }

    tx = ignite.transactions().txStart();

    try {
      assertTrue(cache.getAll(F.asSet("key3", "key4")).isEmpty());

      tx.commit();
    } finally {
      tx.close();
    }

    tx = ignite.transactions().txStart();

    try {
      asyncCache.getAll(F.asSet("key5", "key6"));

      assertTrue(((Map) asyncCache.future().get()).isEmpty());

      tx.commit();
    } finally {
      tx.close();
    }

    tx = ignite.transactions().txStart();

    try {
      cache.put("key7", "key7");

      cache.remove("key7");

      assertNull(cache.get("key7"));

      tx.commit();
    } finally {
      tx.close();
    }

    checkEmpty(cache);
  }
  /**
   * Checks that gets work for implicit txs.
   *
   * @param cache Cache to test.
   * @throws Exception If failed.
   */
  private void checkImplicitTx(IgniteCache<String, String> cache) throws Exception {
    assertNull(cache.get("key1"));

    IgniteCache<String, String> asyncCache = cache.withAsync();

    asyncCache.get("key2");

    assertNull(asyncCache.future().get());

    assertTrue(cache.getAll(F.asSet("key3", "key4")).isEmpty());

    asyncCache.getAll(F.asSet("key5", "key6"));

    assertTrue(((Map) asyncCache.future().get()).isEmpty());

    cache.put("key7", "key7");
    cache.remove("key7", "key7");
    assertNull(cache.get("key7"));

    checkEmpty(cache);
  }
  /** {@inheritDoc} */
  @Override
  public void testRemoteNodes() throws Exception {
    int size = remoteNodeIds().size();

    String name = "oneMoreGrid";

    try {
      Ignite g = startGrid(name);

      UUID joinedId = g.cluster().localNode().id();

      assert projection().forRemotes().nodes().size() == size + 1;

      assert F.nodeIds(projection().forRemotes().nodes()).contains(joinedId);
    } finally {
      stopGrid(name);
    }
  }
  /** @throws Exception If failed. */
  public void testGroupIndexOperations() throws Exception {
    IgniteCache<Integer, GroupIndexTestValue> c =
        ignite(0)
            .getOrCreateCache(cacheConfig("grp", false, Integer.class, GroupIndexTestValue.class));

    try {
      // Check group index usage.
      String qry = "select 1 from GroupIndexTestValue ";

      String plan = columnQuery(c, "explain " + qry + "where a = 1 and b > 0").get(0).toString();

      info("Plan: " + plan);

      assertTrue(plan.contains("grpIdx"));

      // Sorted list
      List<GroupIndexTestValue> list =
          F.asList(
              new GroupIndexTestValue(0, 0),
              new GroupIndexTestValue(0, 5),
              new GroupIndexTestValue(1, 1),
              new GroupIndexTestValue(1, 3),
              new GroupIndexTestValue(2, -1),
              new GroupIndexTestValue(2, 2));

      // Fill cache.
      for (int i = 0; i < list.size(); i++) c.put(i, list.get(i));

      // Check results.
      assertEquals(1, columnQuery(c, qry + "where a = 1 and b = 1").size());
      assertEquals(2, columnQuery(c, qry + "where a = 1 and b < 4").size());
      assertEquals(2, columnQuery(c, qry + "where a = 1 and b <= 3").size());
      assertEquals(1, columnQuery(c, qry + "where a = 1 and b < 3").size());
      assertEquals(2, columnQuery(c, qry + "where a = 1 and b > 0").size());
      assertEquals(1, columnQuery(c, qry + "where a = 1 and b > 1").size());
      assertEquals(2, columnQuery(c, qry + "where a = 1 and b >= 1").size());
      assertEquals(4, columnQuery(c, qry + "where a > 0 and b > 0").size());
      assertEquals(4, columnQuery(c, qry + "where a > 0 and b >= 1").size());
      assertEquals(3, columnQuery(c, qry + "where a > 0 and b > 1").size());
    } finally {
      c.destroy();
    }
  }
 /** {@inheritDoc} */
 @Override
 protected Collection<UUID> remoteNodeIds() {
   return F.nodeIds(grid(0).cluster().forRemotes().nodes());
 }
  /** @throws Exception Thrown if test failed. */
  public void testA() throws Exception {
    Collection<Integer> set = new GridConcurrentWeakHashSet<>();

    Integer i = 1;

    assert set.add(i);
    assert !set.add(i);

    assert set.contains(i);

    assert set.size() == 1;

    Collection<Integer> c = F.asList(2, 3, 4, 5);

    assert set.addAll(c);
    assert !set.addAll(c);

    assert set.containsAll(c);

    assert set.size() == 1 + c.size();

    assert set.remove(i);
    assert !set.remove(i);

    assert !set.contains(i);

    assert set.size() == c.size();

    assert set.removeAll(c);
    assert !set.removeAll(c);

    assert !set.containsAll(c);

    assert set.isEmpty();

    Collection<Integer> c1 = Arrays.asList(1, 3, 5, 7, 9);

    int cnt = 0;

    for (Iterator<Integer> iter = set.iterator(); iter.hasNext(); cnt++) c1.contains(iter.next());

    assert set.size() == cnt;

    assert set.size() == set.toArray().length;

    assert set.addAll(c1);

    assert set.retainAll(c);
    assert !set.retainAll(c);

    Collection<Integer> c2 = F.retain(c1, true, c);

    assert set.containsAll(c2);
    assert !set.containsAll(c1);
    assert !set.containsAll(c);

    assert set.size() == c2.size();

    set.clear();

    assert set.isEmpty();

    try {
      set.iterator().next();

      assert false;
    } catch (NoSuchElementException ignored) {
      assert true;
    }

    try {
      set.add(null);

      assert false;
    } catch (NullPointerException ignored) {
      assert true;
    }
  }
  /** @throws Exception Thrown if test failed. */
  @SuppressWarnings({"UnusedAssignment"})
  public void testB() throws Exception {
    Collection<SampleBean> set = new GridConcurrentWeakHashSet<>();

    SampleBean bean1 = new SampleBean(1);

    assert set.add(bean1);
    assert !set.add(bean1);

    assert set.size() == 1;

    assert set.contains(bean1);

    bean1 = null;

    gc();

    assert set.isEmpty();

    Collection<SampleBean> c =
        F.asList(new SampleBean(1), new SampleBean(2), new SampleBean(3), new SampleBean(4));

    assert set.addAll(c);
    assert !set.addAll(c);

    assert set.size() == c.size();

    assert set.containsAll(c);

    c = null;

    gc();

    assert set.isEmpty();

    SampleBean b1 = new SampleBean(1);
    SampleBean b2 = new SampleBean(2);
    SampleBean b3 = new SampleBean(3);
    SampleBean b4 = new SampleBean(4);
    SampleBean b5 = new SampleBean(5);

    set.add(b1);
    set.add(b2);
    set.add(b3);
    set.add(b4);
    set.add(b5);

    Iterator iter = set.iterator();

    assert iter.hasNext();

    b2 = null;
    b3 = null;
    b4 = null;

    gc();

    int cnt = 0;

    while (iter.hasNext()) {
      info(iter.next().toString());

      cnt++;
    }

    assert set.size() == cnt;
  }