@Test
public void testConversion() throws Exception {

    RemoveControlCharsStandardizer c = RemoveControlCharsStandardizer.instance();
    assertEquals("abcde", c.convertValue("a\u0000b\u0007c\u008fd\ne"));
    assertEquals("abc", c.convertValue("a\n\fbc"));
    assertEquals(" ", c.convertValue(" "));
    assertEquals("", c.convertValue(""));
}