@Test
public void testOrder() throws IOException {

    folder.newFile("7.pdf");
    folder.newFile("44.pdf");
    folder.newFile("14.pdf");
    WildcardsPdfFileSourceAdapter victim = new WildcardsPdfFileSourceAdapter(
            folder.getRoot().getAbsolutePath() + "/*.pdf");
    assertEquals(3, victim.getPdfFileSources().size());
    assertEquals("7.pdf", victim.getPdfFileSources().get(0).getName());
    assertEquals("14.pdf", victim.getPdfFileSources().get(1).getName());
    assertEquals("44.pdf", victim.getPdfFileSources().get(2).getName());
}