Support needed to measure user and service traffic in Chrome.

chrome/browser/net/chrome_network_delegate_unittest.cc

 // 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.
 
 #include "chrome/browser/net/chrome_network_delegate.h"
 
 #include "base/command_line.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop/message_loop.h"
 #include "base/prefs/pref_member.h"
+#include "base/test/histogram_tester.h"
 #include "chrome/browser/content_settings/cookie_settings_factory.h"
 #include "chrome/browser/net/safe_search_util.h"
 #include "chrome/common/pref_names.h"
 #include "chrome/test/base/testing_pref_service_syncable.h"
 #include "chrome/test/base/testing_profile.h"
 #include "components/content_settings/core/browser/cookie_settings.h"
 #include "components/content_settings/core/common/pref_names.h"
+#include "components/data_use_measurement/core/data_use_user_data.h"
+#include "content/public/browser/resource_request_info.h"
 #include "content/public/common/content_switches.h"
+#include "content/public/common/resource_type.h"
 #include "content/public/test/test_browser_thread_bundle.h"
 #include "net/base/request_priority.h"
 #include "net/url_request/url_request.h"
 #include "net/url_request/url_request_test_util.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 #if defined(ENABLE_EXTENSIONS)
 #include "chrome/browser/extensions/event_router_forwarder.h"
 #endif
 
@@ skipping 115 matching lines @@
   // Loop over all combinations of the two policies.
   for (int i = 0; i < 4; i++) {
     bool google_safe_search = i % 2;
     bool youtube_safety_mode = i / 2;
     SetSafeSearch(google_safe_search, youtube_safety_mode);
 
     QueryURL(google_safe_search, youtube_safety_mode);
   }
 }
 
+// This class tests recoding data use of user and services in histograms.
+class ChromeNetworkDelegateDataUseMeasurementTest : public testing::Test {
+ public:
+  ChromeNetworkDelegateDataUseMeasurementTest()
+      : thread_bundle_(content::TestBrowserThreadBundle::IO_MAINLOOP) {
+#if defined(ENABLE_EXTENSIONS)
+    forwarder_ = new extensions::EventRouterForwarder();
+#endif
+  }
+
+  void SetUp() override {
+    ChromeNetworkDelegate::InitializePrefsOnUIThread(
+        &enable_referrers_, NULL, NULL, NULL, profile_.GetTestingPrefService());
+  }
+
+ protected:
+  scoped_ptr<net::NetworkDelegate> CreateNetworkDelegate() {
+    scoped_ptr<ChromeNetworkDelegate> network_delegate(
+        new ChromeNetworkDelegate(forwarder(), &enable_referrers_));
+    return network_delegate.Pass();
+  }
+
+  void SetDelegate(net::NetworkDelegate* delegate) {
+    network_delegate_ = delegate;
+    context_.set_network_delegate(network_delegate_);
+  }
+
+  // This function queries a URLRequest. If |from_user| is true, so it attaches

[bengr, 2015/09/01 17:00:10]

so it -> it
the request assumed -> the request is assumed

What does "the request ... attaches a DataUseUserData" mean? Do you mean "If
|from_user| is false, the request is presumed to be from a service, and the
service name is set in the request's user data."

[amohammadkhan, 2015/09/01 19:38:14]

Done.

+  // a ResourceRequestInfo to the URLRequest, because requests from users have
+  // this info. If |from_user| is false, the request assumed to be from one of
+  // the services so it attaches a DataUseUserData. ServiceName is used as the
+  // name of the service owning this request.
+  void QueryURLDataUse(bool from_user) {
+    scoped_ptr<net::URLRequest> request(context_.CreateRequest(
+        GURL("http://example.com"), net::DEFAULT_PRIORITY, &delegate_));
+    if (from_user) {
+      content::ResourceRequestInfo::AllocateForTesting(
+          request.get(), content::RESOURCE_TYPE_MAIN_FRAME, NULL,
+          -2, -2, -2, true, false, true, true);
+    } else {
+      request->SetUserData(
+          data_use_measurement::DataUseUserData::kUserDataKey,
+          new data_use_measurement::DataUseUserData(
+              data_use_measurement::DataUseUserData::SUGGESTIONS));
+    }
+    request->Start();
+    base::MessageLoop::current()->RunUntilIdle();
+  }
+
+ private:
+  extensions::EventRouterForwarder* forwarder() {
+#if defined(ENABLE_EXTENSIONS)
+    return forwarder_.get();
+#else
+    return NULL;
+#endif
+  }
+
+  content::TestBrowserThreadBundle thread_bundle_;
+#if defined(ENABLE_EXTENSIONS)
+  scoped_refptr<extensions::EventRouterForwarder> forwarder_;
+#endif
+  TestingProfile profile_;
+  BooleanPrefMember enable_referrers_;
+  scoped_ptr<net::URLRequest> request_;
+  net::TestURLRequestContext context_;
+  net::NetworkDelegate* network_delegate_;
+  net::TestDelegate delegate_;
+};
+
+// This function tests data use measurement for different types of requests by
+// making two queries. First query is similar to a query from a service, so it
+// should affect DataUse.NotUser.Dimensions and DataUse.MessageSize.ServiceName
+// histograms. The second query is similar to a query from a user, so it should
+// affect DataUse.User.Dimensions. AppState and ConnectionType dimensions are
+// always Foreground and NotCellular respectively.
+TEST_F(ChromeNetworkDelegateDataUseMeasurementTest, MainTest) {
+  scoped_ptr<net::NetworkDelegate> delegate(CreateNetworkDelegate());
+  SetDelegate(delegate.get());
+  base::HistogramTester histogram_tester;
+
+  QueryURLDataUse(0);  // A query from a service
+  histogram_tester.ExpectTotalCount(
+      "DataUse.NotUser.Downstream.Foreground.NotCellular", 1);
+  histogram_tester.ExpectTotalCount(
+      "DataUse.NotUser.Upstream.Foreground.NotCellular", 1);
+  // One upload and one download message, so totalCount shoudl be 2.
+  histogram_tester.ExpectTotalCount("DataUse.MessageSize.Suggestions", 2);
+  // The upload nad download messages are empty, so their size should be 0.
+  histogram_tester.ExpectUniqueSample("DataUse.MessageSize.Suggestions", 0, 2);
+
+  QueryURLDataUse(1);  // A query from user
+  histogram_tester.ExpectTotalCount(
+      "DataUse.User.Downstream.Foreground.NotCellular", 1);
+  histogram_tester.ExpectTotalCount(
+      "DataUse.User.Upstream.Foreground.NotCellular", 1);
+}
+
 // Privacy Mode disables Channel Id if cookies are blocked (cr223191)
 class ChromeNetworkDelegatePrivacyModeTest : public testing::Test {
  public:
   ChromeNetworkDelegatePrivacyModeTest()
       : thread_bundle_(content::TestBrowserThreadBundle::IO_MAINLOOP),
 #if defined(ENABLE_EXTENSIONS)
         forwarder_(new extensions::EventRouterForwarder()),
 #endif
         cookie_settings_(CookieSettingsFactory::GetForProfile(&profile_).get()),
         kBlockedSite("http://ads.thirdparty.com"),
@@ skipping 96 matching lines @@
                                                        kBlockedFirstPartySite));
 
   cookie_settings_->SetCookieSetting(
       ContentSettingsPattern::FromURL(kBlockedFirstPartySite),
       ContentSettingsPattern::Wildcard(),
       CONTENT_SETTING_BLOCK);
   // Privacy mode is disabled as kAllowedSite is still getting cookies
   EXPECT_FALSE(network_delegate_->CanEnablePrivacyMode(kAllowedSite,
                                                        kBlockedFirstPartySite));
 }