@Test
public void testPositive() {

    PdfFileSourceListAdapter victim = new PdfFileSourceListAdapter(path.getAbsolutePath());
    List<PdfFileSource> list = victim.getFileSourceList();
    assertEquals(5, list.size());
    assertEquals("1 Hello world.pdf", list.get(0).getName());
    assertEquals("2 test_file.pdf", list.get(1).getName());
    assertEquals("3 test_file.pdf", list.get(2).getName());
    assertEquals("10 Blablabla.pdf", list.get(3).getName());
    assertEquals("11 test_file.pdf", list.get(4).getName());
}