expectContents(expected);
  }

  protected final void expectAdded(int index, E... elements) {
    expectAdded(index, asList(elements));
  }

  protected final void expectAdded(int index, Collection<E> elements) {
    List<E> expected = copyToList(getSampleElements());
    expected.addAll(index, elements);
    expectContents(expected);
  }

  /*

        assertEquals("/.*", httpClient.convertRobotsTxtPatternToRegex("/"));
        assertEquals("/index\\.html$", httpClient.convertRobotsTxtPatternToRegex("/index.html$"));
        assertEquals(".*index\\.html$", httpClient.convertRobotsTxtPatternToRegex("index.html$"));
        assertEquals("/\\..*", httpClient.convertRobotsTxtPatternToRegex("/."));

{
  "index": {
    "refresh_interval": "10s",
    "number_of_shards": 1,
    "number_of_replicas": 0,
    "auto_expand_replicas": "0-1"
  }

     */
    long lastAccess();

    /**
     * Gets the file size.
     *
     * @return the file size in bytes
     */
    long length();

    /**
     * Gets the file index.
     *
     * @return the file index inside the parent directory
     */
    int getFileIndex();

    List<E> other = new ArrayList<>(getSampleElements());
    other.set(other.size() / 2, null);
    assertFalse(
        "Two Lists should not be equal if exactly one of them has null at a given index.",
        getList().equals(other));
  }

  @CollectionSize.Require(absent = CollectionSize.ZERO)
  @CollectionFeature.Require(ALLOWS_NULL_VALUES)
  public void testEquals_containingNull() {

{
  "settings": {
    "index": {
      "refresh_interval": "1s",
      "number_of_shards": 1,
      "number_of_replicas": 0,
      "auto_expand_replicas": "0-1"
    }
  }

{
  "settings": {
    "index": {
      "refresh_interval": "1s",
      "number_of_shards": 1,
      "number_of_replicas": 0,
      "auto_expand_replicas": "0-1"
    }
  }

{
  "settings": {
    "index": {
      "refresh_interval": "1s",
      "number_of_shards": 1,
      "number_of_replicas": 0,
      "auto_expand_replicas": "0-1"
    }
  }

{
  "settings": {
    "index": {
      "refresh_interval": "1s",
      "number_of_shards": 1,
      "number_of_replicas": 0,
      "auto_expand_replicas": "0-1"
    }
  }

{
  "settings": {
    "index": {
      "refresh_interval": "1s",
      "number_of_shards": 1,
      "number_of_replicas": 0,
      "auto_expand_replicas": "0-1"
    }
  }