Create NetworkQuietDetector.

third_party/WebKit/Source/core/loader/NetworkQuietDetectorTest.cpp

+// Copyright 2017 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 "core/loader/NetworkQuietDetector.h"
+
+#include "core/testing/DummyPageHolder.h"
+#include "platform/testing/TestingPlatformSupport.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace blink {
+
+class NetworkQuietDetectorTest : public testing::Test {
+ protected:
+  void SetUp() override {
+    platform_->AdvanceClockSeconds(1);
+    dummy_page_holder_ = DummyPageHolder::Create(IntSize(800, 600));
+  }
+
+  double AdvanceClockAndGetTime() {
+    platform_->AdvanceClockSeconds(1);
+    return MonotonicallyIncreasingTime();
+  }
+
+  Document& GetDocument() { return dummy_page_holder_->GetDocument(); }
+  NetworkQuietDetector& Detector() {
+    return NetworkQuietDetector::From(GetDocument());
+  }
+
+  void SimulateNetworkStable() {
+    GetDocument().SetParsingState(Document::kFinishedParsing);
+    Detector().NetworkQuietTimerFired(nullptr);
+  }
+
+  void SimulateNetworkQuiet() {
+    GetDocument().SetParsingState(Document::kFinishedParsing);
+    Detector().NetworkQuietTimerFired(nullptr);
+  }
+
+  void SetActiveConnections(int connections) {
+    Detector().SetNetworkQuietTimers(connections);
+  }
+
+  bool IsNetworkQuietTimerActive() {
+    return Detector().network_quiet_timer_.IsActive();
+  }
+
+  bool HadNetworkQuiet() { return Detector().network_quiet_reached_; }
+
+ protected:
+  ScopedTestingPlatformSupport<TestingPlatformSupportWithMockScheduler>
+      platform_;
+
+  static constexpr double kNetworkQuietWindowSeconds =
+      NetworkQuietDetector::kNetworkQuietWindowSeconds;
+
+ private:
+  std::unique_ptr<DummyPageHolder> dummy_page_holder_;
+};
+
+TEST_F(NetworkQuietDetectorTest, NetworkQuietTimer) {
+  SetActiveConnections(3);
+  EXPECT_FALSE(IsNetworkQuietTimerActive());
+
+  SetActiveConnections(2);
+  platform_->RunForPeriodSeconds(kNetworkQuietWindowSeconds - 0.1);
+  EXPECT_TRUE(IsNetworkQuietTimerActive());
+  EXPECT_FALSE(HadNetworkQuiet());
+
+  SetActiveConnections(2);  // This should reset the quiet timer.
+  platform_->RunForPeriodSeconds(kNetworkQuietWindowSeconds - 0.1);
+  EXPECT_TRUE(IsNetworkQuietTimerActive());
+  EXPECT_FALSE(HadNetworkQuiet());
+
+  SetActiveConnections(1);  // This should not reset the quiet timer.
+  platform_->RunForPeriodSeconds(0.1001);
+  EXPECT_TRUE(HadNetworkQuiet());
+}
+
+}  // namespace blink