content/test/data/indexeddb/write_20mb_blob.html

   1 <!DOCTYPE html>
   2 <html>
   3 <!--
   4   Copyright 2014 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 blobs use space when created and free up space when deleted</title>
  10 <script src="common.js"></script>
  11 <script>
  12
  13 // Constants.
  14 var store_name = 'blobs';
  15 var blob_key = 'blob_key';
  16 var blob_size = 20 * 1024 * 1024;  // 20MB
  17
  18 // Shared variables.
  19 var db;
  20
  21 function test() {
  22   indexedDBTest(prepareDatabase, putBlob);
  23 }
  24
  25 function prepareDatabase() {
  26   db = event.target.result;
  27   db.createObjectStore(store_name);
  28 }
  29
  30 function putBlob() {
  31   debug("Writing blob.");
  32
  33   var trans = db.transaction(store_name, 'readwrite');
  34   trans.onabort = unexpectedAbortCallback;
  35   trans.oncomplete = done;
  36
  37   var data = new Array(1 + blob_size).join("X");
  38   var blob = new Blob([data]);
  39   var request = trans.objectStore(store_name).put(blob, blob_key);
  40   request.onerror = unexpectedErrorCallback;
  41 }
  42
  43 </script>
  44 </head>
  45 <body onLoad="test()">
  46   <div id="status">Starting...<br></div>
  47 </body>
  48 </html>