### Question:
FileListLoader { public static List<String> getFileLisst() { if (fileList.size() == 0) FileListLoader.load(); return fileList; }  static void load(); static List<String> getFileLisst();  }### Answer:
@Test public void testGetFileLisst() { List<String> files = FileListLoader.getFileLisst(); assertNotNull(files); }