third_party/WebKit/LayoutTests/storage/indexeddb/blob-valid-after-deletion.html

   1 <html>
   2 <head>
   3 <script src="../../resources/js-test.js"></script>
   4 <script src="resources/shared.js"></script>
   5 </head>
   6 <body>
   7 <iframe id="frame0"></iframe>
   8 <iframe id="frame1"></iframe>
   9 <iframe id="frame2"></iframe>
  10 <script>
  11
  12 description("Confirm that blobs stay alive after their records are deleted.");
  13
  14 indexedDBTest(prepareDatabase, doRead);
  15 function prepareDatabase()
  16 {
  17     db = event.target.result;
  18     event.target.transaction.onabort = unexpectedAbortCallback;
  19     evalAndLog("store = db.createObjectStore('store')");
  20     blobAContent = "Blob A content";
  21     blobBContent = "Blob B content";
  22     var blobA = new Blob([blobAContent], {"type" : "text/plain"});
  23     var blobB = new Blob([blobBContent], {"type" : "text/plain"});
  24     key = "key"
  25     value = { a0: blobA, a1: blobA, b0: blobB };
  26     evalAndLog("store.put(value, key)");
  27     value = null;
  28 }
  29
  30 function doRead()
  31 {
  32     preamble();
  33     evalAndLog("trans = db.transaction('store')");
  34     evalAndLog("store = trans.objectStore('store')");
  35     evalAndLog("request = store.get(key)");
  36     request.onsuccess = didRead;
  37 }
  38
  39 function didRead()
  40 {
  41     record = request.result;
  42     trans.oncomplete = doDelete;
  43 }
  44
  45 function doDelete()
  46 {
  47     evalAndLog("trans = db.transaction('store', 'readwrite')");
  48     evalAndLog("store = trans.objectStore('store')");
  49     evalAndLog("request = store.delete(key)");
  50     trans.oncomplete = didDelete;
  51 }
  52
  53 function didDelete()
  54 {
  55     urlA0 = URL.createObjectURL(record.a0);
  56     urlA1 = URL.createObjectURL(record.a1);
  57     urlB = URL.createObjectURL(record.b0);
  58     document.getElementById('frame0').src = urlA0;
  59     document.getElementById('frame0').onload = verification;
  60     document.getElementById('frame1').src = urlA1;
  61     document.getElementById('frame1').onload = verification;
  62     document.getElementById('frame2').src = urlB;
  63     document.getElementById('frame2').onload = verification;
  64 }
  65
  66 var loadCount = 0;
  67 function verification()
  68 {
  69     if (++loadCount < 3)
  70         return;
  71     URL.revokeObjectURL(urlA0);
  72     URL.revokeObjectURL(urlA1);
  73     URL.revokeObjectURL(urlB);
  74     shouldBe("document.getElementById('frame0').contentDocument.body.innerText",
  75         "blobAContent");
  76     shouldBe("document.getElementById('frame1').contentDocument.body.innerText",
  77         "blobAContent");
  78     shouldBe("document.getElementById('frame2').contentDocument.body.innerText",
  79         "blobBContent");
  80     finishJSTest();
  81 }
  82
  83 </script>
  84 </body>
  85 </html>
  86