anchor.diff:    testSelectorRoundTrip(r'[a$="b"]');
     testSelectorRoundTrip('[a*="b"]');
   
  -  debug('');
  -
  -  //testSelectorRoundTrip('*|a');
  -  //testSelectorRoundTrip('n|a');
  -  //testSelectorRoundTrip('*|*');
  -  //testSelectorRoundTrip('n|*');
  -  //testSelectorRoundTrip('[*|a]');
  -  //testSelectorRoundTrip('[n|a]');
  -
  -  //debug('');
  -
     testSelectorRoundTrip('a:active');
     testSelectorRoundTrip('a b');
     testSelectorRoundTrip('a + b');
     testSelectorRoundTrip('a ~ b');
     testSelectorRoundTrip('a > b');
  -
  -  debug('');
   
     testSelectorRoundTrip(":active");
     testSelectorRoundTrip(":checked");
  
positive.code: main() {
    document.head.id = "head";
  
    parseThenSerializeRule(rule)
    {
      var styleElement = document.getElementById("style");
      var head = document.getElementById("head");
      if (styleElement != null)
  
negative.code:   }
  
    testSelectorRoundTrip(selector) {
      shouldBeIgnoreSpaces(parseThenSerializeRule("$selector {}"), "$selector {}");
    }
  
  