Verify that VERSION_CHANGE transactions are rolled back after crash.

chrome/test/functional/indexeddb.py

 #!/usr/bin/python
 # 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.
 
 import pyauto_functional
 import pyauto
 
 
 class IndexedDBTest(pyauto.PyUITest):
   """Test of IndexedDB."""
 
+  def _CrashBrowser(self):
+    """Crashes the browser by navigating to special URL"""
+    crash_url = 'about:inducebrowsercrashforrealz'
+    self.NavigateToURL(crash_url)
+
   def _GetTestResult(self):
     """Returns the result of an asynchronous test"""
     js = """
         window.domAutomationController.send(window.testResult);
     """
     return self.ExecuteJavascript(js)
 
   def _WaitForTestResult(self):
     """Waits until a non-empty asynchronous test result is recorded"""
     self.assertTrue(self.WaitUntil(lambda: self._GetTestResult() != '',
@@ skipping 12 matching lines @@
                      msg='Key paths had unexpected values')
 
     self.RestartBrowser(clear_profile=False)
 
     self.NavigateToURL(url)
     self._WaitForTestResult()
     self.assertEqual(self._GetTestResult(),
                      'pass - second run',
                      msg='Key paths had unexpected values')
 
+  def testVersionChangeCrashResilience(self):
+    """Verify that a VERSION_CHANGE transaction is rolled back
+    after a renderer/browser crash"""
+
+    url = self.GetFileURLForDataPath('indexeddb', 'version_change_crash.html')

[Nirnimesh, 2011/11/04 22:25:09]

maybe use GetHttpUrlForDataPath? (here and above as well)

+
+    self.NavigateToURL(url + '#part1')
+    self.WaitUntil(lambda: self._GetTestResult() == 'part1 - complete')

[Nirnimesh, 2011/11/04 22:25:09]

you need to wrap this inside self.assertTrue()

+
+    self.RestartBrowser(clear_profile=False)
+
+    self.NavigateToURL(url + '#part2')
+    self.WaitUntil(lambda: self._GetTestResult() != 'part2 - crash me')
+    self._CrashBrowser()
+
+    self.RestartBrowser(clear_profile=False)

[Nirnimesh, 2011/11/04 22:25:09]

RestartBrowser works by quitting the current browser, but there's no current
browser now. So I thought this would error out.
You could call self.setUp() to just fire up the browser.

Don't bother if it works just fine without erroring out.

+
+    self.NavigateToURL(url + '#part3')
+    self._WaitForTestResult()
+    self.assertEqual(self._GetTestResult(),
+                     'part3 - pass',
+                     msg='VERSION_CHANGE not completely aborted')
+
 if __name__ == '__main__':
   pyauto_functional.Main()