/**
   * JUnit.
   *
   * @throws Exception If failed.
   */
  public void testAddPeekUnbounded() throws Exception {
    // Random queue name.
    String queueName = UUID.randomUUID().toString();

    IgniteQueue<String> queue = grid(0).queue(queueName, 0, config(false));

    String item1 = "1";
    assert queue.add(item1);

    String item2 = "2";
    assert queue.add(item2);

    String item3 = "3";
    assert queue.add(item3);

    assert item1.equals(queue.peek());
    assert item1.equals(queue.peek());
    assert !item2.equals(queue.peek());
  }
  /**
   * JUnit.
   *
   * @throws Exception If failed.
   */
  public void testPutGetUnbounded() throws Exception {
    // Random queue name.
    String queueName = UUID.randomUUID().toString();

    IgniteQueue<String> queue = grid(0).queue(queueName, QUEUE_CAPACITY, config(false));

    String thName = Thread.currentThread().getName();

    for (int i = 0; i < 5; i++) {
      queue.put(thName);
      queue.peek();
      queue.take();
    }

    assert queue.isEmpty() : queue.size();
  }