fune/testing/web-platform/tests/navigation-timing/test_document_open.html

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>window.performance.timing for dynamically created documents</title>
<link rel="author" title="Microsoft" href="http://www.microsoft.com/" />
<link rel="help" href="http://www.w3.org/TR/navigation-timing/#sec-navigation-timing-interface"/>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/common/performance-timeline-utils.js"></script>
<script src="resources/webperftestharness.js"></script>
<script>
setup({explicit_done: true});

// explicitly test the namespace before we start testing
test_namespace();

var originalTiming = {};
var didOpen = false;

function onload_test() {
  if (!didOpen) {
    step_timeout(testTimingWithDocumentOpen, 0);
    didOpen = true;
  }
}

function testTimingWithDocumentOpen() {
  var subcontentWindow = document.getElementById("frameContext").contentWindow;

  if (subcontentWindow.performance === undefined)
  {
    // avoid script errors
    done();
    return;
  }

  var timing = subcontentWindow.performance.timing;
  for (i in timingAttributes) {
    originalTiming[timingAttributes[i]] = timing[timingAttributes[i]];
  }

  var subdocument = subcontentWindow.document;
  subdocument.open();
  subdocument.write('<!DOCTYPE HTML>');
  subdocument.write('<html>');
  subdocument.write('<head>');
  subdocument.write('<meta charset="utf-8" />');
  subdocument.write('<title><Green Test Page</title>');
  subdocument.write('</head>');
  subdocument.write('<body style="background-color:#00FF00;">');
  subdocument.write('</body>');
  subdocument.write('</html>');
  subdocument.close();

  step_timeout(function() {
    var timing = subcontentWindow.performance.timing;
    for (var i in timingAttributes) {
      test_equals(timing[timingAttributes[i]],
                  originalTiming[timingAttributes[i]],
                  timingAttributes[i] + " is the same after document open.");
    }
    done();
  }, 0);
}
</script>
</head>
<body>
<h1>Description</h1>
<p>This test validates window.performance.timing remains constant when a
document is replaced using document.open.</p>

<p>This page should be loaded with a yellow frame below. It then replaces the
document in that frame with a green document.</p>

<p>The test passes if all of the checks to performance.timing are correct and
the frame below ends with a green background.</p>

<div id="log"></div>
<br />
<iframe id="frameContext" onload="onload_test();" src="resources/blank_page_yellow.html" style="width: 250px; height: 250px;"></iframe>
</body>
</html>