Content - a0734f97acc2cca500f280a58fab69fd8b26c778 - eaf7884/paint-timing/paint-visited.html

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Tip revision: ccca6be6d60611a891418fbe0e89663b05e420a2 authored by Joshua Bell on 20 March 2018, 17:58:31 UTC
Indexed DB: Consolidate window/worker IDL tests into any.js

Tip revision: ccca6be

paint-visited.html

<!DOCTYPE html>
<style>
  a:visited {
    color:white;
  }
</style>
<body>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<a id="link" href="./">link</a>
<script>
/* This test ensures that an empty page is painted when there is an invisible visited link (that would be visible if the link was not visited). It's necessary that whether the page is painted or not does not depend on visitedness of the link. Otherwise the paint-timing API could be used to sniff whether a link has been visited or not. */
window.onload = function() {
  /* Convenience helper to get the link into the browsing history.
    Using a relative path because some browsers only allow replaceState within the same domain. */
  current_url = window.location.href;
  history.replaceState({}, "", "./");
  history.replaceState({}, "", current_url);
}
async_test(function(t) {
  function testPaintEntries() {
      const bufferedEntries = performance.getEntriesByType('paint');
      if (bufferedEntries.length < 2) {
          t.step_timeout(function() {
              testPaintEntries();
          }, 20);
          return;
      }
      t.step(function() {
          assert_equals(bufferedEntries.length, 2, "FP and FCP.");
          assert_equals(bufferedEntries[0].entryType, "paint");
          assert_equals(bufferedEntries[0].name, "first-paint");
          assert_equals(bufferedEntries[1].entryType, "paint");
          assert_equals(bufferedEntries[1].name, "first-contentful-paint");
          t.done();
      });
  }
  t.step(function() {
      testPaintEntries();
  });
}, "Visited-attack test to check existence of FP and FCP.");
</script>
</body>

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