@Test
  public void testLoadSortConfigurationAuthorAsc() throws LoadingSortConfigurationException {
    InputStream configFile =
        Thread.currentThread().getContextClassLoader().getResourceAsStream("config/AuthorAsc.xml");
    SortConfiguration sortConfiguration =
        xmlSortConfigurationLoader.loadSortConfiguration(configFile);

    Iterator<SortAttribute> sortAttributeIterator = sortConfiguration.iterator();
    SortAttribute titleAsc = sortAttributeIterator.next();
    assertEquals(SortAttribute.Attribute.AUTHOR, titleAsc.getAttribute());
    assertEquals(SortAttribute.Direction.ASC, titleAsc.getDirection());
    assertFalse(sortAttributeIterator.hasNext());
  }
  @Test
  public void testLoadSortConfigurationTitleAscAndEditionDesc() throws Exception {
    InputStream configFile =
        Thread.currentThread()
            .getContextClassLoader()
            .getResourceAsStream("config/TitleAscAndEditionDesc.xml");
    SortConfiguration sortConfiguration =
        xmlSortConfigurationLoader.loadSortConfiguration(configFile);

    Iterator<SortAttribute> sortAttributeIterator = sortConfiguration.iterator();
    SortAttribute titleAsc = sortAttributeIterator.next();
    assertEquals(SortAttribute.Attribute.TITLE, titleAsc.getAttribute());
    assertEquals(SortAttribute.Direction.ASC, titleAsc.getDirection());

    SortAttribute editionDesc = sortAttributeIterator.next();
    assertEquals(SortAttribute.Attribute.EDITION, editionDesc.getAttribute());
    assertEquals(SortAttribute.Direction.DESC, editionDesc.getDirection());
    assertFalse(sortAttributeIterator.hasNext());
  }