Add EffectiveConnectionType enum to the system profile proto

components/metrics/net/network_metrics_provider_unittest.cc

+// Copyright 2016 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/metrics/net/network_metrics_provider.h"
+
+#include "base/macros.h"
+#include "base/run_loop.h"
+#include "base/threading/thread_task_runner_handle.h"
+#include "components/metrics/proto/system_profile.pb.h"
+#include "content/public/test/test_browser_thread_bundle.h"
+#include "net/base/network_change_notifier.h"
+#include "net/nqe/network_quality_estimator_test_util.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace metrics {
+
+// Verifies that the effective connection type is correctly set.
+TEST(NetworkMetricsProviderTest, EffectiveConnectionType) {
+  content::TestBrowserThreadBundle thread_bundle(
+      content::TestBrowserThreadBundle::IO_MAINLOOP);
+  net::TestNetworkQualityEstimator estimator;
+  SystemProfileProto system_profile;
+
+  NetworkMetricsProvider network_metrics_provider(
+      base::ThreadTaskRunnerHandle::Get().get());
+  EXPECT_EQ(net::EFFECTIVE_CONNECTION_TYPE_UNKNOWN,
+            network_metrics_provider.effective_connection_type_);
+  network_metrics_provider.ProvideSystemProfileMetrics(&system_profile);
+  EXPECT_EQ(SystemProfileProto::Network::EFFECTIVE_CONNECTION_TYPE_UNKNOWN,
+            system_profile.network().effective_connection_type());
+
+  // Set RTT so that the effective connection type is computed as 2G.
+  estimator.set_recent_http_rtt(base::TimeDelta::FromMilliseconds(1500));
+  estimator.set_start_time_null_http_rtt(
+      base::TimeDelta::FromMilliseconds(1500));
+
+  network_metrics_provider.ProvideNetworkQualityEstimator(
+      &estimator, base::ThreadTaskRunnerHandle::Get());
+  EXPECT_EQ(net::EFFECTIVE_CONNECTION_TYPE_UNKNOWN,
+            network_metrics_provider.effective_connection_type_);
+  // Running a request would cause the effective connection type to be computed
+  // as 2G, and observers to be notified.
+  estimator.RunOneRequest();
+  base::RunLoop().RunUntilIdle();
+  EXPECT_EQ(net::EFFECTIVE_CONNECTION_TYPE_2G,
+            network_metrics_provider.effective_connection_type_);
+  network_metrics_provider.ProvideSystemProfileMetrics(&system_profile);
+  EXPECT_EQ(SystemProfileProto::Network::EFFECTIVE_CONNECTION_TYPE_2G,
+            system_profile.network().effective_connection_type());
+
+  // Set RTT so that the effective connection type is computed as SLOW_2G.
+  estimator.set_recent_http_rtt(base::TimeDelta::FromMilliseconds(3000));
+  estimator.set_start_time_null_http_rtt(
+      base::TimeDelta::FromMilliseconds(3000));
+  // Running a request would cause the effective connection type to be computed
+  // as SLOW_2G, and observers to be notified.
+  estimator.RunOneRequest();
+  base::RunLoop().RunUntilIdle();
+  EXPECT_EQ(net::EFFECTIVE_CONNECTION_TYPE_SLOW_2G,
+            network_metrics_provider.effective_connection_type_);
+  network_metrics_provider.ProvideSystemProfileMetrics(&system_profile);
+  // Effective connection type is set to ambiguous since the effective
+  // connection type changed from 2G to SLOW_2G during the lifetime of the log.
+  EXPECT_EQ(SystemProfileProto::Network::EFFECTIVE_CONNECTION_TYPE_AMBIGUOUS,
+            system_profile.network().effective_connection_type());
+
+  // Getting the system profile again should return the actual effective
+  // connection type since the effective connection type did not change during
+  // the lifetime of the log.
+  network_metrics_provider.ProvideSystemProfileMetrics(&system_profile);
+  EXPECT_EQ(SystemProfileProto::Network::EFFECTIVE_CONNECTION_TYPE_SLOW_2G,
+            system_profile.network().effective_connection_type());
+}
+
+}  // namespace metrics