| <!DOCTYPE html> |
| <html> |
| <!-- |
| Copyright 2014 The Chromium Authors. All rights reserved. |
| Use of this source code is governed by a BSD-style license that can be |
| found in the LICENSE file. |
| --> |
| <head> |
| <title>IDB Test that blobs use space when created and free up space when deleted</title> |
| <script src="common.js"></script> |
| <script> |
| |
| // Constants. |
| var store_name = 'blobs_use_space'; |
| var blob_key = 'blob_key'; |
| var blob_size = 4 * 1024 * 1024; |
| |
| // Shared variables. |
| var db; |
| var size_initial; |
| var size_after_write; |
| |
| function test() { |
| indexedDBTest(prepareDatabase, getInitialSize); |
| } |
| |
| function prepareDatabase() { |
| db = event.target.result; |
| db.createObjectStore(store_name); |
| } |
| |
| function getInitialSize() { |
| getUsage(function(usage) { |
| size_initial = usage; |
| putBlob(); |
| }); |
| } |
| |
| function putBlob() { |
| debug("Writing blob."); |
| |
| var trans = db.transaction(store_name, 'readwrite'); |
| trans.onabort = unexpectedAbortCallback; |
| trans.oncomplete = checkSizeIncreased; |
| |
| var data = new Array(1 + blob_size).join("X"); |
| var blob = new Blob([data]); |
| var request = trans.objectStore(store_name).put(blob, blob_key); |
| request.onerror = unexpectedErrorCallback; |
| } |
| |
| function checkSizeIncreased() { |
| getUsage(function(usage) { |
| if (usage < size_initial + blob_size) |
| fail("Size increased by only " + (usage - size_initial) + |
| " after writing 20MB blob"); |
| size_after_write = usage; |
| deleteBlob(); |
| }); |
| } |
| |
| function deleteBlob() { |
| debug("Deleting blob."); |
| var trans = db.transaction(store_name, 'readwrite'); |
| trans.onabort = unexpectedAbortCallback; |
| trans.oncomplete = checkSizeBackToInitial; |
| |
| var request = trans.objectStore(store_name).delete(blob_key); |
| request.onerror = unexpectedErrorCallback; |
| } |
| |
| function checkSizeBackToInitial() { |
| getUsage(function(usage) { |
| if (usage < size_after_write) { |
| done(); |
| } else { |
| fail("Size after deleting blob is " + (usage - size_after_write) + |
| " higher than size after write"); |
| } |
| }); |
| } |
| |
| function getUsage(cb) { |
| navigator.webkitTemporaryStorage.queryUsageAndQuota( |
| function(usage, quota) { |
| debug("Current database size is " + usage + "B"); |
| cb(usage); |
| }, |
| unexpectedErrorCallback); |
| } |
| |
| function displaySize(bytes) { |
| var k = bytes / 1024; |
| var m = k / 1024; |
| return bytes + " (" + k + "k) (" + m + "m)"; |
| } |
| |
| </script> |
| </head> |
| <body onLoad="test()"> |
| <div id="status">Starting...<br></div> |
| </body> |
| </html> |
