Verify that VERSION_CHANGE transactions are rolled back after crash.

chrome/test/data/indexeddb/version_change_crash.js

+// Copyright (c) 2011 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.
+
+window.indexedDB = window.indexedDB || window.webkitIndexedDB;
+window.IDBTransaction = window.IDBTransaction || window.webkitIDBTransaction;
+
+window.testResult = '';
+
+var INDUCE_BROWSER_CRASH_URL = 'about:inducebrowsercrashforrealz';
+function crashBrowser() {
+  chrome.tabs.create({url: INDUCE_BROWSER_CRASH_URL}, callbackFail(ERROR));
+}
+
+
+function test() {
+
+  var openreq = window.indexedDB.open('test-db');
+  openreq.onsuccess = function(e) {
+    var db = openreq.result;
+
+    if (document.location.hash === '#part1') {
+      testPart1(db);
+    } else if (document.location.hash === '#part2') {
+      testPart2(db);
+    } else if (document.location.hash === '#part3') {
+      testPart3(db);
+    } else {
+      window.testResult = 'fail';
+    }
+  };
+}
+
+function testPart1(db) {
+  // Prepare the database, then exit normally
+
+  // Set version 1, create store1
+  var setverreq = db.setVersion('1.0');
+  setverreq.onsuccess = function(e) {
+    db.createObjectStore('store1');
+    setverreq.result.oncomplete = function (e) {
+      window.testResult = 'part1 - complete';
+    };
+  };
+}
+
+function testPart2(db) {
+  // Start a VERSION_CHANGE then crash
+
+  // Set version 2, twiddle stores and crash
+  var setverreq = db.setVersion('2.0');
+  setverreq.onsuccess = function(e) {
+    var store = db.createObjectStore('store2');
+    window.testResult = 'part2 - crash me';
+
+    // Keep adding to the transaction so it can't commit
+    (function loop() { store.put(0, 0).onsuccess = loop; }());
+  };
+}
+
+function testPart3(db) {
+  // Validate that Part 2 never committed
+
+  // Check version
+  if (db.version !== '1.0') {
+    window.testResult = 'fail, version incorrect';
+    return;
+  }
+
+  if (!db.objectStoreNames.contains('store1')) {
+    window.testResult = 'fail, store1 does not exist';
+    return;
+  }
+
+  if (db.objectStoreNames.contains('store2')) {
+    window.testResult = 'fail, store2 exists';
+    return;
+  }
+
+  window.testResult = 'part3 - pass';
+}