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# 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.
import logging
from common import chrome_proxy_metrics as metrics
from telemetry.core import exceptions
from telemetry.page import page_test
class ChromeProxyValidation(page_test.PageTest):
"""Base class for all chrome proxy correctness measurements."""
# Value of the extra via header. |None| if no extra via header is expected.
extra_via_header = None
def __init__(self, restart_after_each_page=False, metrics=None):
super(ChromeProxyValidation, self).__init__(
needs_browser_restart_after_each_page=restart_after_each_page)
self._metrics = metrics
self._page = None
# Whether a timeout exception is expected during the test.
self._expect_timeout = False
def CustomizeBrowserOptions(self, options):
# Enable the chrome proxy (data reduction proxy).
options.AppendExtraBrowserArgs('--enable-spdy-proxy-auth')
def WillNavigateToPage(self, page, tab):
tab.ClearCache(force=True)
assert self._metrics
self._metrics.Start(page, tab)
def ValidateAndMeasurePage(self, page, tab, results):
self._page = page
# Wait for the load event.
tab.WaitForJavaScriptExpression('performance.timing.loadEventStart', 300)
assert self._metrics
self._metrics.Stop(page, tab)
if ChromeProxyValidation.extra_via_header:
self._metrics.AddResultsForExtraViaHeader(
tab, results, ChromeProxyValidation.extra_via_header)
self.AddResults(tab, results)
def AddResults(self, tab, results):
raise NotImplementedError
def StopBrowserAfterPage(self, browser, page): # pylint: disable=W0613
if hasattr(page, 'restart_after') and page.restart_after:
return True
return False
def RunNavigateSteps(self, page, tab):
# The redirect from safebrowsing causes a timeout. Ignore that.
try:
super(ChromeProxyValidation, self).RunNavigateSteps(page, tab)
if self._expect_timeout:
raise metrics.ChromeProxyMetricException, (
'Timeout was expected, but did not occur')
except exceptions.TimeoutException as e:
if self._expect_timeout:
logging.warning('Navigation timeout on page %s',
page.name if page.name else page.url)
else:
raise e
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