http/tests/loading/preload-img-test.html

<html>
<head>
  <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
  <script>
  function CallCommand(cmd)
  {
       try {
           var req = new XMLHttpRequest;
           req.open("GET", "/resources/network-simulator.php?command=" + cmd, false);
           req.send(null);
           return req.responseText;
       } catch (ex) {
           return "";
       }
   }
   
   function test()
   {
       if (window.testRunner) {
           testRunner.waitUntilDone();
           testRunner.dumpAsText();
       }
   }

   function checkAccessCount()
   {
       // Get the access count of resource:/loading/resources/preload-test.jpg. Should be 1.
       var count = CallCommand("get-resource-count&path=/loading/resources/preload-test.jpg");
       count = parseInt(count, 10);
       if (count == 1)
           checkNotifyDone();
       else
           img_error();
   }

   function img_error()
   {
       document.getElementById("outputPanel").innerHTML = "FAILED";
       checkNotifyDone();
   }

   function checkNotifyDone() {
       if (window.testRunner)
           testRunner.notifyDone();
   }
   // Reset resource count   
   CallCommand("reset-resource-count");
  </script>
  <script type="text/javascript" src="./resources/empty.js"></script>
</head>
<body onload="test()">
  <img id ="test_image" src="/resources/network-simulator.php?command=increase-resource-count&path=/loading/resources/preload-test.jpg" onerror="img_error()" onload="setTimeout(checkAccessCount, 3000)">
  <p>This test is to test whether preload image will require 2 more requests or not.</p>
  <span id="outputPanel">PASSED</span>
</body>
</html>