Support needed to measure user and service traffic in Chrome.

components/data_use_measurement/content/data_use_measurement_unittest.cc

+// Copyright 2015 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 "components/data_use_measurement/content/data_use_measurement.h"
+
+#include "base/test/histogram_tester.h"
+#include "content/public/browser/resource_request_info.h"
+#include "net/base/network_change_notifier.h"
+#include "net/socket/socket_test_util.h"
+#include "net/url_request/url_request.h"
+#include "net/url_request/url_request_test_util.h"
+#include "testing/gmock/include/gmock/gmock.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+#if defined(OS_ANDROID)
+#include "base/android/application_status_listener.h"
+#endif
+
+namespace data_use_measurement {
+
+class DataUseMeasurementTest : public testing::Test {
+ public:
+  DataUseMeasurementTest() : context_(new net::TestURLRequestContext(true)) {
+    context_.set_client_socket_factory(&socket_factory_);
+    context_.set_network_delegate(&test_network_delegate_);
+    context_.Init();
+
+    UpdateConnectionType();
+  }
+
+ protected:
+  // This function makes one user request and one service request and confirms
+  // that their effect is reflected in proper histograms.
+  void TestForAUserAndAServicePacket(const std::string& target_dimension) {
+    net::MockRead reads[] = {net::MockRead("HTTP/1.1 200 OK\r\n"
+                                           "Content-Length: 12\r\n\r\n"),
+                             net::MockRead("Test Content"),
+                             net::MockRead("HTTP/1.1 200 OK\r\n"
+                                           "Content-Length: 13\r\n\r\n"),
+                             net::MockRead("Test Content2")};
+
+    net::StaticSocketDataProvider socket_data(reads, arraysize(reads), nullptr,
+                                              0);
+    socket_factory_.AddSocketDataProvider(&socket_data);
+    base::HistogramTester histogram_tester;
+    scoped_ptr<net::URLRequest> request(context_.CreateRequest(
+        GURL("http://foo.com"), net::DEFAULT_PRIORITY, &test_delegate_));
+    request->SetUserData(
+        data_use_measurement::DataUseUserData::kUserDataKey,
+        new data_use_measurement::DataUseUserData(
+            data_use_measurement::DataUseUserData::SUGGESTIONS));
+    request->Start();
+    loop_.Run();
+    data_use_measurement_.ReportDataUseUMA(request.get());
+    histogram_tester.ExpectTotalCount(
+        "DataUse.NotUser.Downstream." + target_dimension + connection_type_, 1);
+    histogram_tester.ExpectTotalCount(
+        "DataUse.NotUser.Upstream." + target_dimension + connection_type_, 1);
+    // One upload and one download message, so total count should be 2.
+    histogram_tester.ExpectTotalCount("DataUse.MessageSize.Suggestions", 2);
+
+    scoped_ptr<net::URLRequest> request2(context_.CreateRequest(
+        GURL("http://foo.com"), net::DEFAULT_PRIORITY, &test_delegate_));
+    content::ResourceRequestInfo::AllocateForTesting(
+        request2.get(), content::RESOURCE_TYPE_MAIN_FRAME, NULL,
+        -2,  // render_process_id
+        -2, -2, true, false, true, true);

[bengr, 2015/09/01 20:16:01]

What are these -2's and other parameters? I.e., why did you comment on one of
the params but not the others?

[amohammadkhan, 2015/09/01 23:02:43]

I was using negative process id to prevent an error in the tests, but later I
solved the problem by making changes in profileManager. The numbers are some
arbitrary numbers.

+    request2->Start();
+    loop_.Run();
+    data_use_measurement_.ReportDataUseUMA(request2.get());
+    histogram_tester.ExpectTotalCount(
+        "DataUse.User.Downstream." + target_dimension + connection_type_, 1);
+    histogram_tester.ExpectTotalCount(
+        "DataUse.User.Upstream." + target_dimension + connection_type_, 1);
+  }
+
+  void UpdateConnectionType() {
+    if (net::NetworkChangeNotifier::IsConnectionCellular(
+            net::NetworkChangeNotifier::GetConnectionType())) {
+      connection_type_ = "Cellular";
+    } else {
+      connection_type_ = "NotCellular";
+    }
+  }
+
+  base::MessageLoopForIO loop_;
+  net::TestURLRequestContext context_;
+  net::TestNetworkDelegate test_network_delegate_;
+  DataUseMeasurement data_use_measurement_;
+  net::TestDelegate test_delegate_;
+  std::string connection_type_;
+  net::MockClientSocketFactory socket_factory_;
+};
+
+// This test function tests recording of data use information in UMA histogram
+// when packet is originated from user or services.
+// TODO(amohammadkhan): Add tests for Cellular/non-cellular connection types
+// when support for testing is provided in its class.
+TEST_F(DataUseMeasurementTest, UserNotUserTest) {
+#if defined(OS_ANDROID)
+  data_use_measurement_.OnApplicationStateChangeForTesting(
+      base::android::APPLICATION_STATE_HAS_RUNNING_ACTIVITIES);
+#endif
+  UpdateConnectionType();
+  TestForAUserAndAServicePacket("Foreground.");
+}
+
+#if defined(OS_ANDROID)
+TEST_F(DataUseMeasurementTest, ApplicationStateTest) {
+#if defined(OS_ANDROID)
+  data_use_measurement_.OnApplicationStateChangeForTesting(
+      base::android::APPLICATION_STATE_HAS_STOPPED_ACTIVITIES);
+#endif
+  UpdateConnectionType();
+  TestForAUserAndAServicePacket("Background.");
+}
+#endif
+
+}  // namespace data_use_measurement