Quelle test_evict_from_bfcache.html Sprache: HTML

products/Sources/formale Sprachen/C/Firefox/docshell/test/navigation/test_evict_from_bfcache.html

<!DOCTYPE HTML>
<html>
<head>
  <meta charset="utf-8">
  <title>Evict a page from bfcache</title>
  <script src="/tests/SimpleTest/SimpleTest.js"></script>
  <link rel="stylesheet" href="/tests/SimpleTest/test.css"/>
  <script defer>
  /*
   * This test checks that a page can be evicted from bfcache. Sending a
   * message to an open BroadcastChannel is used for this.
   *
   * First the test opens a window and loads a page there. Another page is then
   * loaded and then session history is navigated back to check if bfcache is
   * enabled. If not, close message is sent to close the opened window and this
   * controller page will finish the test.
   * If bfcache is enabled, session history goes forward, but the
   * BroadcastChannel in the page isn't closed. Then sending the message to go
   * back again should evict the bfcached page.
   * Close message is sent and window closed and test finishes.
   */

  SimpleTest.waitForExplicitFinish();

  SimpleTest.enableLegacyUnpartitionedStorage().then( () => {
    var bc = new BroadcastChannel("evict_from_bfcache");
    var pageshowCount = 0;
    bc.onmessage = function(event) {
      if (event.data.type == "pageshow") {
        ++pageshowCount;
        info("pageshow " + pageshowCount);
        if (pageshowCount == 1) {
          bc.postMessage("nextpage");
        } else if (pageshowCount == 2) {
          bc.postMessage("back");
        } else if (pageshowCount == 3) {
          if (!event.data.persisted) {
            ok(true, "BFCache isn't enabled.");
            bc.postMessage("close");
          } else {
            bc.postMessage("forward");
          }
        } else if (pageshowCount == 4) {
          bc.postMessage("back");
        } else if (pageshowCount == 5) {
          ok(!event.data.persisted,
            "The page should have been evicted from BFCache");
          bc.postMessage("close");
        }
      } else if (event.data == "closed") {
        SimpleTest.finish();
      }
    }
    window.open("file_evict_from_bfcache.html", "", "noopener");
  });
  </script>
</head>
<body>
<p id="display"></p>
<div id="content" style="display: none"></div>
<pre id="test"></pre>
</body>
</html>

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