@Override
  public FileObject[] findJarFiles() throws KettleFileException {
    return findJarFiles( searchLibDir );
  }
@Test
  public void testFindJarFiles_DirWithJarInNameNotAddedAndTxtFileNotAdded() throws IOException, KettleFileException {
    Files.createDirectories( PATH_TO_DIR_WITH_JAR_IN_NAME );
    Files.createFile( PATH_TO_NOT_JAR_FILE );

    FileObject[] findJarFiles = plFolder.findJarFiles();
    assertNotNull( findJarFiles );
    assertEquals( 0, findJarFiles.length );
  }