public void testGeneral() {
    doTestGeneral(is('a'), 'a', 'b');
    doTestGeneral(isNot('a'), 'b', 'a');
    doTestGeneral(anyOf("x"), 'x', 'z');
    doTestGeneral(anyOf("xy"), 'y', 'z');
    doTestGeneral(anyOf("CharMatcher"), 'C', 'z');
    doTestGeneral(noneOf("CharMatcher"), 'z', 'C');
    doTestGeneral(inRange('p', 'x'), 'q', 'z');
  }

  private void doTestGeneral(CharMatcher matcher, char match, char noMatch) {