}

  private void doTestGeneral(CharMatcher matcher, char match, char noMatch) {
    doTestOneCharMatch(matcher, "" + match);
    doTestOneCharNoMatch(matcher, "" + noMatch);
    doTestMatchThenNoMatch(matcher, "" + match + noMatch);
    doTestNoMatchThenMatch(matcher, "" + noMatch + match);
  }

  private void doTestOneCharMatch(CharMatcher matcher, String s) {
    reallyTestOneCharMatch(matcher, s);