Notify NQE of TCP RTT values

net/base/socket_performance_watcher_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 "net/base/socket_performance_watcher.h"
+
+#include <stddef.h>
+
+#include "base/macros.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/time/time.h"
+#include "net/base/socket_performance_watcher_factory.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace net {
+
+namespace {
+
+class TestSocketPerformanceWatcherFactory
+    : public SocketPerformanceWatcherFactory {
+ public:
+  TestSocketPerformanceWatcherFactory() : rtt_notification_received_count_(0) {}
+
+  ~TestSocketPerformanceWatcherFactory() override {}
+
+  // SocketPerformanceWatcherFactory implementation:
+  scoped_ptr<SocketPerformanceWatcher> CreateSocketPerformanceWatcher(
+      const Protocol protocol) override {
+    return scoped_ptr<SocketPerformanceWatcher>(
+        new SocketPerformanceWatcher(protocol, this));
+  }
+
+  void OnUpdatedRTTAvailable(const Protocol protocol,
+                             const base::TimeDelta& rtt) override {
+    rtt_notification_received_count_++;
+  }
+
+  void OnWatcherReset() override {}
+
+  size_t rtt_notification_received_count() const {
+    return rtt_notification_received_count_;
+  }
+
+ private:
+  size_t rtt_notification_received_count_;
+
+  DISALLOW_COPY_AND_ASSIGN(TestSocketPerformanceWatcherFactory);
+};
+
+// Tests if SocketPerformanceWatcher computes ShouldNotifyUpdatedRTT()
+// correctly.
+// TODO(tbansal): crbug.com/590300: Tighten up this test once
+// ShouldNotifyUpdatedRTT() is tuned.
+TEST(SocketPerformanceWatcherTest, TestCanNotifyRTT) {
+  TestSocketPerformanceWatcherFactory socket_performance_watcher_factory;
+  scoped_ptr<SocketPerformanceWatcher> watcher =
+      socket_performance_watcher_factory.CreateSocketPerformanceWatcher(
+          SocketPerformanceWatcherFactory::PROTOCOL_TCP);
+  watcher->OnUpdatedRTTAvailable(base::TimeDelta::FromSeconds(1));
+  EXPECT_EQ(
+      1u, socket_performance_watcher_factory.rtt_notification_received_count());
+  EXPECT_FALSE(watcher->ShouldNotifyUpdatedRTT());
+  watcher->Reset();
+  EXPECT_TRUE(watcher->ShouldNotifyUpdatedRTT());
+}
+
+}  // namespace
+
+}  // namespace net