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chromium/third_party/blink/web_tests/external/wpt/navigation-api/navigation-history-entry/entries-after-blob-navigation.html 

<!doctype html>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="resources/is_uuid.js"></script>
<iframe id="i" src="/common/blank.html"></iframe>
<script>
async_test(t => {
  window.onload = t.step_func(() => {
    i.onload = t.step_func_done(() => {
      let entries = i.contentWindow.navigation.entries();
      assert_equals(entries.length, 2);
      assert_not_equals(entries[1].key, entries[0].key);
      assert_not_equals(entries[1].url, entries[0].url);
      assert_equals(new URL(entries[1].url).protocol, "blob:");
      assert_not_equals(entries[1].id, entries[0].id);

      assert_true(isUUID(entries[0].key));
      assert_true(isUUID(entries[0].id));
      assert_true(isUUID(entries[1].key));
      assert_true(isUUID(entries[1].id));
    });
    i.src = URL.createObjectURL(new Blob(["<body></body>"]));
  });
}, "entries() after navigation to a blob: URL");
</script>