content/test/data/indexeddb/blob_did_ack_prefetch.html

   1 <!DOCTYPE html>
   2 <html>
   3 <!--
   4   Copyright 2015 The Chromium Authors. All rights reserved.
   5   Use of this source code is governed by a BSD-style license that can be
   6   found in the LICENSE file.
   7 -->
   8 <head>
   9 <title>IDB Test that unused cursor prefetches are acked back to browser process</title>
  10 <script src="common.js"></script>
  11 <script>
  12
  13 // Constants.
  14 var store_name = 'prefetch_blobs_ack';
  15 var kNumToFetch = 15; // Enough to trigger prefetch, but not on a batch boundary.
  16
  17 // Shared variables.
  18 var db;
  19
  20 function test() {
  21   indexedDBTest(prepareDatabase, iterateCursor);
  22 }
  23
  24 function prepareDatabase() {
  25   db = event.target.result;
  26   var store = db.createObjectStore(store_name);
  27   for (var i = 0; i < kNumToFetch + 10; ++i)
  28     store.put(new Blob([String(i)]), i);
  29 }
  30
  31 function iterateCursor() {
  32   var tx = db.transaction(store_name, 'readonly');
  33   var count = kNumToFetch;
  34   var request = tx.objectStore(store_name).openCursor();
  35   request.onerror = unexpectedErrorCallback;
  36   request.onsuccess = function() {
  37     if (--count > 0)
  38       request.result.continue();
  39   };
  40   tx.onabort = unexpectedAbortCallback;
  41   tx.oncomplete = onComplete;
  42 }
  43
  44 function onComplete() {
  45   gc();
  46   done();
  47 }
  48
  49 </script>
  50 </head>
  51 <body onLoad="test()">
  52   <div id="status">Starting...<br>
  53     <p>Run this test with --js-flags=--expose-gc when run from Chrome.</p>
  54   </div>
  55 </body>
  56 </html>