Run Chrome Endure tests with network simulation via Web Page Replay.

chrome/test/functional/perf_endure.py

 #!/usr/bin/env python
 # Copyright (c) 2012 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.
 
 """Performance tests for Chrome Endure (long-running perf tests on Chrome).
 
 This module accepts the following environment variable inputs:
   TEST_LENGTH: The number of seconds in which to run each test.
   PERF_STATS_INTERVAL: The number of seconds to wait in-between each sampling
@@ skipping 15 matching lines @@
 import time
 
 import perf
 import pyauto_functional  # Must be imported before pyauto.
 import pyauto
 import pyauto_errors
 import pyauto_utils
 import remote_inspector_client
 import selenium.common.exceptions
 from selenium.webdriver.support.ui import WebDriverWait
+import webpagereplay
 
 
 class NotSupportedEnvironmentError(RuntimeError):
   """Represent an error raised since the environment (OS) is not supported."""
   pass
 
 class ChromeEndureBaseTest(perf.BasePerfTest):
   """Implements common functionality for all Chrome Endure tests.
 
   All Chrome Endure test classes should inherit from this class.
@@ skipping 127 matching lines @@
     # The same with setUp, but need to fetch the environment variable since
     # ExtraChromeFlags is called before setUp.
     deep_memory_profile = self._GetDeepMemoryProfileEnv(
         'DEEP_MEMORY_PROFILE', bool, self._DEEP_MEMORY_PROFILE)
 
     # Ensure Chrome enables remote debugging on port 9222.  This is required to
     # interact with Chrome's remote inspector.
     extra_flags = ['--remote-debugging-port=9222']
     if deep_memory_profile:
       extra_flags.append('--no-sandbox')
+
+    # Add flags for the Web Page Replay server if necessary.
+    if 'DO_NOT_USE_WPR_FOR_ENDURE' not in os.environ:

[dennis_jeffrey, 2012/07/24 00:39:35]

there are multiple places where we check whether this environment variable is
present in os.environ.  We should probably only check for it once in the
ChromeEndureBaseTest setUp() function, then store the result in a local boolean
class variable, and check the value of that variable here.

[fdeng1, 2012/07/24 04:30:05]

Done.

+      extra_flags.extend(ChromeEndureWebPageReplay().chrome_flags)
+
     return (perf.BasePerfTest.ExtraChromeFlags(self) + extra_flags)
 
   def _OnTimelineEvent(self, event_info):
     """Invoked by the Remote Inspector Client when a timeline event occurs.
 
     Args:
       event_info: A dictionary containing raw information associated with a
          timeline event received from Chrome's remote inspector.  Refer to
          chrome/src/third_party/WebKit/Source/WebCore/inspector/Inspector.json
          for the format of this dictionary.
@@ skipping 340 matching lines @@
     try:
       element = self._GetElement(driver.find_element_by_xpath, xpath)
       element.click()
     except (selenium.common.exceptions.StaleElementReferenceException,
             selenium.common.exceptions.TimeoutException) as e:
       logging.exception('WebDriver exception: %s' % e)
       return False
 
     return True
 
+  def _StartReplayServerIfNecessary(self, test_name):
+    """Start the Web Page Replay server if DO_NOT_USE_WPR_FOR_ENDURE is not set.
+
+    This method need to be called BEFORE any connection (which are supposed

[dennis_jeffrey, 2012/07/24 00:39:35]

'need' --> 'needs'

[fdeng1, 2012/07/24 04:30:05]

Done.

+    to go through the Web Page Replay server) occurs.
+
+    Args:
+      test_name: name of the test.
+    """
+    if 'DO_NOT_USE_WPR_FOR_ENDURE' not in os.environ:
+      mode = 'Record' if 'WPR_RECORD' in os.environ else 'Replay'
+      logging.info('Starting the Web Page Replay server: in %s mode', mode)
+
+      self.wpr_server = ChromeEndureWebPageReplay().GetReplayServer(test_name)
+      self.wpr_server.StartServer()
+      logging.info('The Web Page Replay server started.')
+
+  def _StopReplayServerIfNecessary(self):
+    """Stop the Web Page Replay server if DO_NOT_USE_WPR_FOR_ENDURE is not set.
+
+    This method has to be called AFTER all network connections which go
+    through Web Page Replay server have shut down. Otherwise the
+    Web Page Replay server will hang to wait for them. A good
+    place is to call it at the end of the teardown process.
+    """
+

[dennis_jeffrey, 2012/07/24 00:39:35]

remove this blank line

[fdeng1, 2012/07/24 04:30:05]

Done.

+    if 'DO_NOT_USE_WPR_FOR_ENDURE' not in os.environ:
+      logging.info('Stopping The Web Page Replay server.')
+      self.wpr_server.StopServer()
+      logging.info('The Web Page Replay server stopped.')
+
 
 class ChromeEndureControlTest(ChromeEndureBaseTest):
   """Control tests for Chrome Endure."""
 
   _WEBAPP_NAME = 'Control'
   _TAB_TITLE_SUBSTRING = 'Chrome Endure Control Test'
 
   def testControlAttachDetachDOMTree(self):
     """Continually attach and detach a DOM tree from a basic document."""
     test_description = 'AttachDetachDOMTree'
@@ skipping 37 matching lines @@
                         test_description, lambda: scenario(driver))
 
 
 class ChromeEndureGmailTest(ChromeEndureBaseTest):
   """Long-running performance tests for Chrome using Gmail."""
 
   _WEBAPP_NAME = 'Gmail'
   _TAB_TITLE_SUBSTRING = 'Gmail'
   _FRAME_XPATH = 'id("canvas_frame")'
 
-  def setUp(self):
-    ChromeEndureBaseTest.setUp(self)
+  def _GmailSetUp(self, test_name):
+    """Set up before each test runs."""
+
+    # Start the Web Page Replay server.
+    self._StartReplayServerIfNecessary(test_name)
 
     # Log into a test Google account and open up Gmail.
     self._LoginToGoogleAccount(account_key='test_google_account_gmail')
     self.NavigateToURL('http://www.gmail.com')
     loaded_tab_title = self.GetActiveTabTitle()
     self.assertTrue(self._TAB_TITLE_SUBSTRING in loaded_tab_title,
                     msg='Loaded tab title does not contain "%s": "%s"' %
                         (self._TAB_TITLE_SUBSTRING, loaded_tab_title))
 
     self._driver = self.NewWebDriver()
     # Any call to wait.until() will raise an exception if the timeout is hit.
     # TODO(dennisjeffrey): Remove the need for webdriver's wait using the new
     # DOM mutation observer mechanism.
     self._wait = WebDriverWait(self._driver, timeout=60)
 
     # Wait until Gmail's 'canvas_frame' loads and the 'Inbox' link is present.
     # TODO(dennisjeffrey): Check with the Gmail team to see if there's a better
     # way to tell when the webpage is ready for user interaction.
     self._wait.until(
         self._SwitchToCanvasFrame)  # Raises exception if the timeout is hit.
     # Wait for the inbox to appear.
     self.WaitForDomNode('//a[starts-with(@title, "Inbox")]',
                         frame_xpath=self._FRAME_XPATH)
 
+  def tearDown(self):
+    super(ChromeEndureGmailTest, self).tearDown()
+    # Stop the Web Page Replay server after all connections to WPR closed.
+    self._StopReplayServerIfNecessary()
+
   def _SwitchToCanvasFrame(self, driver):
     """Switch the WebDriver to Gmail's 'canvas_frame', if it's available.
 
     Args:
       driver: A selenium.webdriver.remote.webdriver.WebDriver object.
 
     Returns:
       True, if the switch to Gmail's 'canvas_frame' is successful, or
       False if not.
     """
@@ skipping 59 matching lines @@
     else:
       logging.warning('Could not identify latency value.')
 
   def testGmailComposeDiscard(self):
     """Continuously composes/discards an e-mail before sending.
 
     This test continually composes/discards an e-mail using Gmail, and
     periodically gathers performance stats that may reveal memory bloat.
     """
     test_description = 'ComposeDiscard'
+    self._GmailSetUp(test_description)
 
     # TODO(dennisjeffrey): Remove following line once crosbug.com/32357 is
     # fixed.
     self._test_length_sec = 60 * 60 * 5  # Run test for 5 hours.
 
     def scenario():
       # Click the "Compose" button, enter some text into the "To" field, enter
       # some text into the "Subject" field, then click the "Discard" button to
       # discard the message.
       compose_xpath = '//div[text()="COMPOSE"]'
@@ skipping 31 matching lines @@
 
   # TODO(dennisjeffrey): Remove this test once the Gmail team is done analyzing
   # the results after the test runs for a period of time.
   def testGmailComposeDiscardSleep(self):
     """Like testGmailComposeDiscard, but sleeps for 30s between iterations.
 
     This is a temporary test requested by the Gmail team to compare against the
     results from testGmailComposeDiscard above.
     """
     test_description = 'ComposeDiscardSleep'
+    self._GmailSetUp(test_description)
 
     # TODO(dennisjeffrey): Remove following line once crosbug.com/32357 is
     # fixed.
     self._test_length_sec = 60 * 60 * 5  # Run test for 5 hours.
 
     def scenario():
       # Click the "Compose" button, enter some text into the "To" field, enter
       # some text into the "Subject" field, then click the "Discard" button to
       # discard the message.  Finally, sleep for 30 seconds.
       compose_xpath = '//div[text()="COMPOSE"]'
@@ skipping 35 matching lines @@
                         frame_xpath=self._FRAME_XPATH)
 
   def testGmailAlternateThreadlistConversation(self):
     """Alternates between threadlist view and conversation view.
 
     This test continually clicks between the threadlist (Inbox) and the
     conversation view (e-mail message view), and periodically gathers
     performance stats that may reveal memory bloat.
     """
     test_description = 'ThreadConversation'
+    self._GmailSetUp(test_description)
 
     def scenario():
       # Click an e-mail to see the conversation view, wait 1 second, click the
       # "Inbox" link to see the threadlist, wait 1 second.
 
       # Find the first thread (e-mail) identified by a "span" tag that contains
       # an "email" attribute.  Then click it and wait for the conversation view
       # to appear (assumed to be visible when a particular div exists on the
       # page).
       thread_xpath = '//span[@email]'
@@ skipping 23 matching lines @@
                         test_description, scenario,
                         frame_xpath=self._FRAME_XPATH)
 
   def testGmailAlternateTwoLabels(self):
     """Continuously alternates between two labels.
 
     This test continually clicks between the "Inbox" and "Sent Mail" labels,
     and periodically gathers performance stats that may reveal memory bloat.
     """
     test_description = 'AlternateLabels'
+    self._GmailSetUp(test_description)
 
     def scenario():
       # Click the "Sent Mail" label, wait for 1 second, click the "Inbox" label,
       # wait for 1 second.
 
       # Click the "Sent Mail" label, then wait for the tab title to be updated
       # with the substring "sent".
       sent_xpath = '//a[starts-with(text(), "Sent Mail")]'
       self.WaitForDomNode(sent_xpath, frame_xpath=self._FRAME_XPATH)
       sent = self._GetElement(self._driver.find_element_by_xpath, sent_xpath)
@@ skipping 22 matching lines @@
 
   def testGmailExpandCollapseConversation(self):
     """Continuously expands/collapses all messages in a conversation.
 
     This test opens up a conversation (e-mail thread) with several messages,
     then continually alternates between the "Expand all" and "Collapse all"
     views, while periodically gathering performance stats that may reveal memory
     bloat.
     """
     test_description = 'ExpandCollapse'
+    self._GmailSetUp(test_description)
 
     # Enter conversation view for a particular thread.
     thread_xpath = '//span[@email]'
     self.WaitForDomNode(thread_xpath, frame_xpath=self._FRAME_XPATH)
     thread = self._GetElement(self._driver.find_element_by_xpath, thread_xpath)
     thread.click()
     self.WaitForDomNode('//div[text()="Click here to "]',
                         frame_xpath=self._FRAME_XPATH)
 
     def scenario():
@@ skipping 30 matching lines @@
                         test_description, scenario,
                         frame_xpath=self._FRAME_XPATH)
 
 
 class ChromeEndureDocsTest(ChromeEndureBaseTest):
   """Long-running performance tests for Chrome using Google Docs."""
 
   _WEBAPP_NAME = 'Docs'
   _TAB_TITLE_SUBSTRING = 'Google Drive'
 
-  def setUp(self):
-    ChromeEndureBaseTest.setUp(self)
+  def _DocsSetUp(self, test_name):
+    """Set up before each test runs."""
+
+    # Start the Web Page Replay server.
+    self._StartReplayServerIfNecessary(test_name)
 
     # Log into a test Google account and open up Google Docs.
     self._LoginToGoogleAccount()
     self.NavigateToURL('http://docs.google.com')
     self.assertTrue(
         self.WaitUntil(lambda: self._TAB_TITLE_SUBSTRING in
                                self.GetActiveTabTitle(),
                        timeout=60, expect_retval=True, retry_sleep=1),
         msg='Timed out waiting for Docs to load. Tab title is: %s' %
             self.GetActiveTabTitle())
 
     self._driver = self.NewWebDriver()
 
+  def tearDown(self):
+    super(ChromeEndureDocsTest, self).tearDown()
+    # Stop the Web Page Replay server after all connections to it closed.
+    self._StopReplayServerIfNecessary()
+
   def testDocsAlternatelyClickLists(self):
     """Alternates between two different document lists.
 
     This test alternately clicks the "Shared with me" and "My Drive" buttons in
     Google Docs, and periodically gathers performance stats that may reveal
     memory bloat.
     """
     test_description = 'AlternateLists'
+    self._DocsSetUp(test_description)
 
     def scenario():
       # Click the "Shared with me" button, wait for 1 second, click the
       # "My Drive" button, wait for 1 second.
 
       # Click the "Shared with me" button and wait for a div to appear.
       if not self._ClickElementByXpath(
           self._driver, '//span[starts-with(text(), "Shared with me")]'):
         self._num_errors += 1
       self.WaitForDomNode('//div[text()="Share date"]')
@@ skipping 18 matching lines @@
     self._RunEndureTest(self._WEBAPP_NAME, self._TAB_TITLE_SUBSTRING,
                         test_description, scenario)
 
 
 class ChromeEndurePlusTest(ChromeEndureBaseTest):
   """Long-running performance tests for Chrome using Google Plus."""
 
   _WEBAPP_NAME = 'Plus'
   _TAB_TITLE_SUBSTRING = 'Google+'
 
-  def setUp(self):
-    ChromeEndureBaseTest.setUp(self)
+  def _PlusSetUp(self, test_name):
+    """Set up before each test runs."""
+
+    # Start the Web Page Replay server.
+    self._StartReplayServerIfNecessary(test_name)
 
     # Log into a test Google account and open up Google Plus.
     self._LoginToGoogleAccount()
     self.NavigateToURL('http://plus.google.com')
     loaded_tab_title = self.GetActiveTabTitle()
     self.assertTrue(self._TAB_TITLE_SUBSTRING in loaded_tab_title,
                     msg='Loaded tab title does not contain "%s": "%s"' %
                         (self._TAB_TITLE_SUBSTRING, loaded_tab_title))
 
     self._driver = self.NewWebDriver()
 
+  def tearDown(self):
+    super(ChromeEndurePlusTest, self).tearDown()
+    # Stop the Web Page Replay server after all connections to it closed.
+    self._StopReplayServerIfNecessary()
+
   def testPlusAlternatelyClickStreams(self):
     """Alternates between two different streams.
 
     This test alternately clicks the "Friends" and "Family" buttons using
     Google Plus, and periodically gathers performance stats that may reveal
     memory bloat.
     """
     test_description = 'AlternateStreams'
+    self._PlusSetUp(test_description)
 
     # TODO(dennisjeffrey): Remove following line once crosbug.com/32357 is
     # fixed.
     self._test_length_sec = 60 * 60 * 3  # Run test for 3 hours.
 
     def scenario():
       # Click the "Friends" button, wait for 1 second, click the "Family"
       # button, wait for 1 second.
 
       # Click the "Friends" button and wait for a resulting div to appear.
@@ skipping 79 matching lines @@
       except (pyauto_errors.JSONInterfaceError,
               pyauto_errors.JavascriptRuntimeError):
         self._num_errors += 1
 
       time.sleep(1)
 
     self._RunEndureTest(self._WEBAPP_NAME, self._TAB_TITLE_SUBSTRING,
                         test_description, scenario)
 
 
+class ChromeEndureWebPageReplay(perf.BaseWebPageReplay):
+  """Set up Web Page Replay server for Endure tests.
+
+  This class inherits from perf.BaseWebPageReplay to allow different settings
+  for the Web Page Replay server.
+

[dennis_jeffrey, 2012/07/24 00:39:35]

remove this blank line

[fdeng1, 2012/07/24 04:30:05]

Done.

+  """
+
+  def __init__(self):
+    # Call parent __init__

[dennis_jeffrey, 2012/07/24 00:39:35]

probably don't need this comment.  it's easy to see that from the code itself

[fdeng1, 2012/07/24 04:30:05]

Done.

+    super(ChromeEndureWebPageReplay, self).__init__()
+
+    # Extra paths for Web Page Replay

[dennis_jeffrey, 2012/07/24 00:39:35]

add period at end of sentence

[fdeng1, 2012/07/24 04:30:05]

Done.

+    extra_paths = {
+        'archive':
+        'src/chrome/test/data/chrome_endure/webpagereplay/{test_name}.wpr',
+        'scripts': 'src/chrome/test/data/chrome_endure/deterministic.js',
+        }
+    self._paths.update(extra_paths)
+
+    # Add custumized injected_scripts for Endure tests.

[dennis_jeffrey, 2012/07/24 00:39:35]

'custumized' --> 'customized'

[fdeng1, 2012/07/24 04:30:05]

Done.

+    assert os.path.exists(self.Path('scripts')), (
+        'The scripts to be injected do not exist: %s' %
+        self.Path('scripts'))
+    self._replay_flags.append('--inject_scripts=%s' % self.Path('scripts'))
+
+
 if __name__ == '__main__':
   pyauto_functional.Main()