Integration test for data reduction proxy version header

tools/chrome_proxy/integration_tests/chrome_proxy_metrics.py

 # 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 datetime
 import logging
 import os
 
 from integration_tests import network_metrics
 from telemetry.page import page_test
@@ skipping 139 matching lines @@
         else:
           r = resp.response
           raise ChromeProxyMetricException, (
               '%s: Via header (%s) is not valid (refer=%s, status=%d)' % (
                   r.url, r.GetHeader('Via'), r.GetHeader('Referer'), r.status))
     results.AddValue(scalar.ScalarValue(
         results.current_page, 'checked_via_header', 'count', via_count))
     results.AddValue(scalar.ScalarValue(
         results.current_page, 'request_bypassed', 'count', bypass_count))
 
+  def AddResultsForClientVersion(self, tab, results):
+    for resp in self.IterResponses(tab):
+      r = resp.response
+      if resp.response.status != 200:
+        raise ChromeProxyMetricException, ('%s: Response is not 200: %d' %
+                                           (r.url, r.status))
+      if not resp.IsValidByViaHeader():
+        raise ChromeProxyMetricException, ('%s: Response missing via header' %
+                                           (r.url))
+    results.AddValue(scalar.ScalarValue(
+        results.current_page, 'version_test', 'count', 1))
+
+
   def IsProxyBypassed(self, tab):
     """ Returns True if all configured proxies are bypassed."""
     if not tab:
       return False, []
 
     info = GetProxyInfoFromNetworkInternals(tab)
     if not info['enabled']:
       raise ChromeProxyMetricException, (
           'Chrome proxy should be enabled. proxy info: %s' % info)
 
@@ skipping 108 matching lines @@
     bad_proxies = []
     if 'badProxies' in info and info['badProxies']:
       bad_proxies = [p['proxy'] for p in info['badProxies']
                      if 'proxy' in p and p['proxy']]
     if bad_proxies != expected_bad_proxies:
       raise ChromeProxyMetricException, (
           'Wrong bad proxies (%s). Expect: "%s"' % (
           str(bad_proxies), str(expected_bad_proxies)))
     results.AddValue(scalar.ScalarValue(
         results.current_page, 'http_fallback', 'boolean', True))