nav2-test-timing-persistent.html

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This WPT test may be referenced by the following Test IDs:
- /navigation-timing/nav2-test-timing-persistent.html - WPT Dashboard Interop Dashboard

<!DOCTYPE HTML>

<html>

<head>

  <meta charset=utf-8>

  <title>PerformanceNavigationTiming timing remains after iframe removed</title>

  <script src="/resources/testharness.js"></script>

  <script src="/resources/testharnessreport.js"></script>

</head>

<body>

  <script>

    const timingAttributes = [

      'domComplete',

      'domContentLoadedEventEnd',

      'domContentLoadedEventStart',

      'domInteractive',

];

    function verify_timing(pnt, description) {

      for (const att of timingAttributes) {

        assert_greater_than(pnt[att], 0, `${description} ${att}`);

    promise_test(async function (t) {

      const iframe = document.createElement("iframe");

      document.body.appendChild(iframe);

      iframe.src = "resources/blank_page_green.html";

      await new Promise(resolve => {

        iframe.onload = function () {

          assert_equals(iframe.contentWindow.performance.getEntriesByType("navigation").length, 1, "Only one navigation time entry");

          const pnt = iframe.contentWindow.performance.getEntriesByType("navigation")[0];

          assert_equals(pnt.name, iframe.contentWindow.location.toString(), "navigation name matches the window.location");

          assert_true(pnt.name.endsWith("blank_page_green.html"), "navigation name is blank_page_green.html");

          verify_timing(pnt, "timing values should be positive number:");

          iframe.remove();

          verify_timing(pnt, "timing values should remain positive after iframe is removed:");

          resolve();

});

    }, "iframe navigation times are persistent after the iframe is removed.");

  </script>

</body>

</html>