First cut of chrome-proxy (data reduction proxy) measurements.

tools/perf/metrics/chrome_proxy_unittest.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 unittest
+
+from metrics import chrome_proxy
+from metrics import network_unittest
+from metrics import test_page_measurement_results
+
+
+_EVENTS = [
+    # An HTML not via proxy.
+    network_unittest.NetworkMetricTest.MakeNetworkTimelineEvent(
+        url='http://test.html1',
+        response_headers={
+            'Content-Type': 'text/html',
+            'Content-Length': str(len(network_unittest.HTML_BODY)),
+            },
+        body=network_unittest.HTML_BODY),
+
+    # An HTML via proxy with old Via header.
+    network_unittest.NetworkMetricTest.MakeNetworkTimelineEvent(
+        url='http://test.html2',
+        response_headers={
+            'Content-Type': 'text/html',
+            'Content-Encoding': 'gzip',
+            'X-Original-Content-Length': str(len(network_unittest.HTML_BODY)),
+            'Via': chrome_proxy.CHROME_PROXY_VIA_HEADER_OLD + ',other-via',
+            },
+        body=network_unittest.HTML_BODY),
+
+    # An image via proxy with Via header and it is cached.
+    network_unittest.NetworkMetricTest.MakeNetworkTimelineEvent(
+        url='http://test.image',
+        response_headers={
+            'Content-Type': 'image/jpeg',
+            'Content-Encoding': 'gzip',
+            'X-Original-Content-Length': str(network_unittest.IMAGE_OCL),
+            'Via': '1.1 ' + chrome_proxy.CHROME_PROXY_VIA_HEADER,
+            },
+        body=base64.b64encode(network_unittest.IMAGE_BODY),
+        base64_encoded_body=True,
+        served_from_cache=True),
+
+    # An image fetched directly.
+    network_unittest.NetworkMetricTest.MakeNetworkTimelineEvent(
+        url='http://test.image',
+        response_headers={
+            'Content-Type': 'image/jpeg',
+            'Content-Encoding': 'gzip',
+            },
+        body=base64.b64encode(network_unittest.IMAGE_BODY),
+        base64_encoded_body=True),
+
+    # A safe-browsing malware response.
+    network_unittest.NetworkMetricTest.MakeNetworkTimelineEvent(
+        url='http://test.malware',
+        response_headers={
+            'X-Malware-Url': '1',
+            'Via': '1.1 ' + chrome_proxy.CHROME_PROXY_VIA_HEADER,
+            'Location': 'http://test.malware',
+            },
+        status=307),
+    ]
+
+
+class ChromeProxyMetricTest(unittest.TestCase):
+  def testChromeProxyResponse(self):
+    # An https non-proxy response.
+    resp = chrome_proxy.ChromeProxyResponse(
+        network_unittest.NetworkMetricTest.MakeNetworkTimelineEvent(
+            url='https://test.url',
+            response_headers={
+                'Content-Type': 'text/html',
+                'Content-Length': str(len(network_unittest.HTML_BODY)),
+                'Via': 'some other via',
+                },
+            body=network_unittest.HTML_BODY))
+    self.assertFalse(resp.ShouldHaveChromeProxyViaHeader())
+    self.assertFalse(resp.HasChromeProxyViaHeader())
+    self.assertTrue(resp.IsValidByViaHeader())
+
+    # A proxied JPEG image response
+    resp = chrome_proxy.ChromeProxyResponse(
+        network_unittest.NetworkMetricTest.MakeNetworkTimelineEvent(
+            url='http://test.image',
+            response_headers={
+                'Content-Type': 'image/jpeg',
+                'Content-Encoding': 'gzip',
+                'Via': '1.1 ' + chrome_proxy.CHROME_PROXY_VIA_HEADER,
+                'X-Original-Content-Length': str(network_unittest.IMAGE_OCL),
+                },
+            body=base64.b64encode(network_unittest.IMAGE_BODY),
+            base64_encoded_body=True))
+    self.assertTrue(resp.ShouldHaveChromeProxyViaHeader())
+    self.assertTrue(resp.HasChromeProxyViaHeader())
+    self.assertTrue(resp.IsValidByViaHeader())
+
+  def testChromePrxoyMetricForDataSaving(self):

[bengr, 2014/03/26 22:45:55]

Proxy

[bolian, 2014/03/27 00:43:32]

Done.

+    metric = chrome_proxy.ChromeProxyMetric()
+    metric._events = _EVENTS[:4]
+
+    self.assertTrue(len(_EVENTS[:4]), len(list(metric.IterResponses(None))))
+    results = test_page_measurement_results.TestPageMeasurementResults(self)
+
+    metric.AddResultsForDataSaving(None, results)
+    results.AssertHasPageSpecificScalarValue('resources_via_proxy', 'count', 2)
+    results.AssertHasPageSpecificScalarValue('resources_from_cache', 'count', 1)
+    results.AssertHasPageSpecificScalarValue('resources_direct', 'count', 2)
+
+  def testChromePrxoyMetricForHeaderValidation(self):

[bengr, 2014/03/26 22:45:55]

Proxy

[bolian, 2014/03/27 00:43:32]

Done.

+    metric = chrome_proxy.ChromeProxyMetric()
+    metric._events = _EVENTS[:4]
+    results = test_page_measurement_results.TestPageMeasurementResults(self)
+
+    missing_via_exception = False
+    try:
+      metric.AddResultsForHeaderValidation(None, results)
+    except chrome_proxy.ChromeProxyMetricException:
+      missing_via_exception = True
+    # Only the HTTP image response does not have a valid Via header.
+    self.assertTrue(missing_via_exception)
+
+    # Two events with valid Via headers.
+    metric._events = _EVENTS[1:3]
+    metric.AddResultsForHeaderValidation(None, results)
+    results.AssertHasPageSpecificScalarValue('checked_via_header', 'count', 2)
+
+  def testChromePrxoyMetricForBypass(self):

[bengr, 2014/03/26 22:45:55]

Proxy

[bolian, 2014/03/27 00:43:32]

Done.

+    metric = chrome_proxy.ChromeProxyMetric()
+    metric._events = _EVENTS[:4]
+    results = test_page_measurement_results.TestPageMeasurementResults(self)
+
+    bypass_exception = False
+    try:
+      metric.AddResultsForBypass(None, results)
+    except chrome_proxy.ChromeProxyMetricException:
+      bypass_exception = True
+    # Two of the first three events have Via headers.
+    self.assertTrue(bypass_exception)
+
+    # Use directly fetched image only. It is treated as bypassed.
+    metric._events = _EVENTS[3:4]
+    metric.AddResultsForBypass(None, results)
+    results.AssertHasPageSpecificScalarValue('bypass', 'count', 1)
+
+  def testChromePrxoyMetricForSafebrowsing(self):

[bengr, 2014/03/26 22:45:55]

Proxy

[bolian, 2014/03/27 00:43:32]

Done.

+    metric = chrome_proxy.ChromeProxyMetric()
+    metric._events = _EVENTS[4:]
+    results = test_page_measurement_results.TestPageMeasurementResults(self)
+
+    metric.AddResultsForSafebrowsing(None, results)
+    results.AssertHasPageSpecificScalarValue('safebrowsing', 'boolean', True)
+
+    # Clear results and metrics to test no response for safebrowsing
+    results = test_page_measurement_results.TestPageMeasurementResults(self)
+    metric._events = []
+    metric.AddResultsForSafebrowsing(None, results)
+    results.AssertHasPageSpecificScalarValue('safebrowsing', 'boolean', True)