third_party/WebKit/LayoutTests/fast/js/pic/cached-array-length-access.html

   1 <p>
   2 This page tests cached access to properties of dictionary objects and objects
   3 with changing prototypes. If the test passes, you'll see a series of PASS messages
   4 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.\n");
  26         } else {
  27             log("FAIL: " + aDescription + " should be " + b + " but instead is " + a + ".\n");
  28         }
  29     }
  30
  31     (function() {
  32         var largestInteger = 4294967295;
  33         var array = new Array();
  34         array[largestInteger - 1] = "test";
  35         var len = -1;
  36         for (var i=0; i<10; ++i) len = array.length;
  37
  38         shouldBe(len, "len", largestInteger);
  39     })();
  40
  41 })();
  42 </script>