anchor.diff:      return result;
     }
   
  -  shouldBe(test("background-clip: -webkit-text", "background-clip"), "-webkit-text");
     shouldBe(test("background-clip: -webkit-text", "-webkit-background-clip"), '');
   
     shouldBe(test("background-clip: content-box", "background-clip"), "content-box");
  
positive.code:   shouldBe(test("background-clip: text", "-webkit-background-clip"), '');
  
    shouldBe(test("-webkit-background-clip: -webkit-text", "background-clip"), '');
    shouldBe(test("-webkit-background-clip: -webkit-text", "-webkit-background-clip"), "-webkit-text");
  
    shouldBe(test("-webkit-background-clip: text", "background-clip"), '');
    shouldBe(test("-webkit-background-clip: text", "-webkit-background-clip"), "text");
    shouldBe(test("background: url() padding-box", "-webkit-background-clip"), '');
  
    shouldBe(test("-webkit-mask: url() ", "background-clip"), '');
  
negative.code:  */
  import "dart:html";
  import "../../testcommon.dart";
  
  main() {
    test(declaration, property) {
  