Integration test for Chrome-Proxy: pass-through directive

tools/chrome_proxy/integration_tests/chrome_proxy_measurements.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 base64
 import logging
 import urlparse
 
 from common.chrome_proxy_measurements import ChromeProxyValidation
 from integration_tests import chrome_proxy_metrics as metrics
@@ skipping 256 matching lines @@
         restart_after_each_page=True,
         metrics=metrics.ChromeProxyMetric())
 
   def CustomizeBrowserOptions(self, options):
     super(ChromeProxyExpDirective, self).CustomizeBrowserOptions(options)
     options.AppendExtraBrowserArgs('--data-reduction-proxy-experiment=test')
 
   def AddResults(self, tab, results):
     self._metrics.AddResultsForBypass(tab, results, url_pattern='/exptest/')
 
+class ChromeProxyPassThrough(ChromeProxyValidation):
+  """Correctness measurement for Chrome-Proxy pass-through directives.
+
+  This test verifies that "pass-through" in the Chrome-Proxy request header
+  causes a resource to be loaded without Data Reduction Proxy transformations.
+  """
+
+  def __init__(self):
+    super(ChromeProxyPassThrough, self).__init__(
+        restart_after_each_page=True,
+        metrics=metrics.ChromeProxyMetric())
+
+  def CustomizeBrowserOptions(self, options):
+    super(ChromeProxyPassThrough, self).CustomizeBrowserOptions(options)
+
+  def AddResults(self, tab, results):
+    self._metrics.AddResultsForPassThrough(tab, results)
 
 class ChromeProxyHTTPToDirectFallback(ChromeProxyValidation):
   """Correctness measurement for HTTP proxy fallback to direct."""
 
   def __init__(self):
     super(ChromeProxyHTTPToDirectFallback, self).__init__(
         restart_after_each_page=True,
         metrics=metrics.ChromeProxyMetric())
 
   def CustomizeBrowserOptions(self, options):
@@ skipping 151 matching lines @@
       if pm[x] != dm[x]:
         err('Mismatch for %s (proxied=%s direct=%s): %s' %
             (x, str(pm[x]), str(dm[x]), page.url))
 
     # Proxied XOCL should match direct CL.
     pxocl = pm['x_original_content_length_header']
     dcl = dm['content_length_header']
     if pxocl != dcl:
       err('Mismatch for content length (proxied=%s direct=%s): %s' %
           (str(pxocl), str(dcl), page.url))