  <!DOCTYPE html>
  <html>
      <head>
          <meta charset="utf-8" />
          <title>Navigation Timing 2 WPT</title>
          <link rel="author" title="Google" href="http://www.google.com/" />
          <link rel="help" href="http://www.w3.org/TR/navigation-timing-2/#sec-PerformanceNavigationTiming"/>
          <script src="/resources/testharness.js"></script>
          <script src="/resources/testharnessreport.js"></script>
          <script>
              setup({ single_test: true });

              var navTiming2Attributes = [
                  'connectEnd',
                  'connectStart',
                  'decodedBodySize',
                  'domComplete',
                  'domContentLoadedEventEnd',
                  'domContentLoadedEventStart',
                  'domInteractive',
                  'domainLookupEnd',
                  'domainLookupStart',
                  'duration',
                  'encodedBodySize',
                  'entryType',
                  'fetchStart',
                  'initiatorType',
                  'loadEventEnd',
                  'loadEventStart',
                  'name',
                  'redirectCount',
                  'redirectEnd',
                  'redirectStart',
                  'requestStart',
                  'responseEnd',
                  'responseStart',
                  'secureConnectionStart',
                  'transferSize',
                  'type',
                  'unloadEventEnd',
                  'unloadEventStart',
                  'workerStart'
              ];

              var originalTiming = {};
              var didOpen = false;

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

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

                  var timing = subcontentWindow.performance.getEntriesByType("navigation")[0];
                  for (i in navTiming2Attributes) {
                      originalTiming[navTiming2Attributes[i]] = timing[navTiming2Attributes[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();

                  setTimeout(function() {
                      var timing = subcontentWindow.performance.getEntriesByType("navigation")[0];
                      for (var i in navTiming2Attributes) {
                          assert_equals(originalTiming[navTiming2Attributes[i]], timing[navTiming2Attributes[i]],
                            navTiming2Attributes[i] + " is the same after document open.");
                      }
                      done();
                  }, 0);
              }
          </script>
      </head>
      <body>
          <h1>Description</h1>
          <p>This test validates window.performance.getEntriesByType("navigation") 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.getEntriesByType("navigation") are correct and
          the frame below ends with a green background.</p>

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