* not capacity constrained.
   *
   * @return {@code Integer.MAX_VALUE}
   */
  @CanIgnoreReturnValue // pushed down from class to method
  @Override
  public int remainingCapacity() {
    return Integer.MAX_VALUE;
  }

  /**
   * Removes a single instance of the specified element from this queue, if it is present. More

    assertEquals(3, queue.remainingCapacity());
    queue.add("hi");
    assertEquals(2, queue.remainingCapacity());
    queue.add("hi");
    assertEquals(1, queue.remainingCapacity());
    queue.add("hi");
    assertEquals(0, queue.remainingCapacity());
  }

  public void testEvictingAfterOne() throws Exception {
    EvictingQueue<String> queue = EvictingQueue.create(1);
    assertEquals(0, queue.size());