third_party/WebKit/LayoutTests/fast/js/pic/cached-single-entry-transition.html

   1 <p>
   2 This page verifies that the single property optimization doesn't cause similar
   3 looking objects to be given the same structure identifiers. If the test passes,
   4 you'll see a PASS message below.
   5 </p>
   6
   7 <pre id="console"></pre>
   8
   9 <script>
  10 (function() {
  11     if (window.testRunner)
  12         testRunner.dumpAsText();
  13
  14     function log(s)
  15     {
  16         if (this.document)
  17             document.getElementById("console").appendChild(document.createTextNode(s + "\n"));
  18         else
  19             print(s + "\n");
  20     }
  21
  22     function shouldBe(a, aDescription, b)
  23     {
  24         if (a === b) {
  25             log("PASS: " + aDescription + " should be " + b + " and is.");
  26         } else {
  27             log("FAIL: " + aDescription + " should be " + b + " but instead is " + a + ".");
  28         }
  29     }
  30
  31     function getA(o)
  32     {
  33         return o.a;
  34     }
  35
  36     var o1 = { a: 1, x: 1 };
  37     var o2 = { b: 1, x: 1 };
  38
  39     getA(o1);
  40     getA(o1);
  41
  42     shouldBe(getA(o2), "getA(o2)", undefined);
  43 })();
  44 </script>