protected String concat( String path, String name ) {
    return FilenameUtils.concat( path, name );
  }
@Test
  public void testConcat() {

    assertEquals( "/home/devuser/files/food.txt",
      testInstance.concat( "/home/devuser/files", "food.txt" ).replace('\\', '/') );

    assertEquals( "/home/devuser/files/food.txt",
      testInstance.concat( "/home/devuser/files/", "food.txt" ).replace('\\', '/') );

    assertEquals( "/home/devuser/files/food.txt",
      testInstance.concat( "/", "home/devuser/files/food.txt" ).replace('\\', '/') );

    assertEquals( "/",
      testInstance.concat( "/", "" ).replace('\\', '/') );

    assertEquals( "/home/devuser/files/",
      testInstance.concat( "/home/devuser/files", "" ).replace('\\', '/') );
  }