Migrate page_load_metrics out of components.

components/page_load_metrics/renderer/metrics_render_frame_observer_unittest.cc

-// Copyright (c) 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/page_load_metrics/renderer/metrics_render_frame_observer.h"
-
-#include <memory>
-#include <utility>
-
-#include "base/memory/ptr_util.h"
-#include "base/time/time.h"
-#include "base/timer/mock_timer.h"
-#include "components/page_load_metrics/common/page_load_timing.h"
-#include "components/page_load_metrics/renderer/fake_page_timing_metrics_ipc_sender.h"
-#include "testing/gtest/include/gtest/gtest.h"
-
-namespace page_load_metrics {
-
-// Implementation of the MetricsRenderFrameObserver class we're testing,
-// with the GetTiming() and ShouldSendMetrics() methods stubbed out to make
-// the rest of the class more testable.
-class TestMetricsRenderFrameObserver : public MetricsRenderFrameObserver {
- public:
-  TestMetricsRenderFrameObserver() : MetricsRenderFrameObserver(nullptr) {}
-
-  std::unique_ptr<base::Timer> CreateTimer() const override {
-    if (!mock_timer_)
-      ADD_FAILURE() << "CreateTimer() called, but no MockTimer available.";
-    return std::move(mock_timer_);
-  }
-
-  // We intercept sent messages and dispatch them to our
-  // FakePageTimingMetricsIPCSender, which we use to verify that the expected
-  // IPC messages get sent.
-  bool Send(IPC::Message* message) override {
-    return fake_timing_ipc_sender_.Send(message);
-  }
-
-  void set_mock_timer(std::unique_ptr<base::Timer> timer) {
-    ASSERT_EQ(nullptr, mock_timer_);
-    mock_timer_ = std::move(timer);
-  }
-
-  void ExpectPageLoadTiming(const PageLoadTiming& timing) {
-    fake_timing_ipc_sender_.ExpectPageLoadTiming(timing);
-  }
-
-  PageLoadTiming GetTiming() const override {
-    return fake_timing_ipc_sender_.expected_timings().empty()
-               ? PageLoadTiming()
-               : fake_timing_ipc_sender_.expected_timings().back();
-  }
-
-  void VerifyExpectedTimings() const {
-    fake_timing_ipc_sender_.VerifyExpectedTimings();
-  }
-
-  bool ShouldSendMetrics() const override { return true; }
-  bool HasNoRenderFrame() const override { return false; }
-
- private:
-  FakePageTimingMetricsIPCSender fake_timing_ipc_sender_;
-  mutable std::unique_ptr<base::Timer> mock_timer_;
-};
-
-typedef testing::Test MetricsRenderFrameObserverTest;
-
-TEST_F(MetricsRenderFrameObserverTest, NoMetrics) {
-  TestMetricsRenderFrameObserver observer;
-  base::MockTimer* mock_timer = new base::MockTimer(false, false);
-  observer.set_mock_timer(base::WrapUnique(mock_timer));
-
-  observer.DidChangePerformanceTiming();
-  ASSERT_FALSE(mock_timer->IsRunning());
-}
-
-TEST_F(MetricsRenderFrameObserverTest, SingleMetric) {
-  base::Time nav_start = base::Time::FromDoubleT(10);
-  base::TimeDelta first_layout = base::TimeDelta::FromMillisecondsD(10);
-
-  TestMetricsRenderFrameObserver observer;
-  base::MockTimer* mock_timer = new base::MockTimer(false, false);
-  observer.set_mock_timer(base::WrapUnique(mock_timer));
-
-  PageLoadTiming timing;
-  timing.navigation_start = nav_start;
-  observer.ExpectPageLoadTiming(timing);
-  observer.DidCommitProvisionalLoad(true, false);
-  mock_timer->Fire();
-
-  timing.first_layout = first_layout;
-  observer.ExpectPageLoadTiming(timing);
-
-  observer.DidChangePerformanceTiming();
-  mock_timer->Fire();
-}
-
-TEST_F(MetricsRenderFrameObserverTest, MultipleMetrics) {
-  base::Time nav_start = base::Time::FromDoubleT(10);
-  base::TimeDelta first_layout = base::TimeDelta::FromMillisecondsD(2);
-  base::TimeDelta dom_event = base::TimeDelta::FromMillisecondsD(2);
-  base::TimeDelta load_event = base::TimeDelta::FromMillisecondsD(2);
-
-  TestMetricsRenderFrameObserver observer;
-  base::MockTimer* mock_timer = new base::MockTimer(false, false);
-  observer.set_mock_timer(base::WrapUnique(mock_timer));
-
-  PageLoadTiming timing;
-  timing.navigation_start = nav_start;
-  observer.ExpectPageLoadTiming(timing);
-  observer.DidCommitProvisionalLoad(true, false);
-  mock_timer->Fire();
-
-  timing.first_layout = first_layout;
-  timing.dom_content_loaded_event_start = dom_event;
-  observer.ExpectPageLoadTiming(timing);
-
-  observer.DidChangePerformanceTiming();
-  mock_timer->Fire();
-
-  // At this point, we should have triggered the generation of two metrics.
-  // Verify and reset the observer's expectations before moving on to the next
-  // part of the test.
-  observer.VerifyExpectedTimings();
-
-  timing.load_event_start = load_event;
-  observer.ExpectPageLoadTiming(timing);
-
-  observer.DidChangePerformanceTiming();
-  mock_timer->Fire();
-
-  // Verify and reset the observer's expectations before moving on to the next
-  // part of the test.
-  observer.VerifyExpectedTimings();
-
-  // The PageLoadTiming above includes timing information for the first layout,
-  // dom content, and load metrics. However, since we've already generated
-  // timing information for all of these metrics previously, we do not expect
-  // this invocation to generate any additional metrics.
-  observer.DidChangePerformanceTiming();
-  ASSERT_FALSE(mock_timer->IsRunning());
-}
-
-TEST_F(MetricsRenderFrameObserverTest, MultipleNavigations) {
-  base::Time nav_start = base::Time::FromDoubleT(10);
-  base::TimeDelta first_layout = base::TimeDelta::FromMillisecondsD(2);
-  base::TimeDelta dom_event = base::TimeDelta::FromMillisecondsD(2);
-  base::TimeDelta load_event = base::TimeDelta::FromMillisecondsD(2);
-
-  TestMetricsRenderFrameObserver observer;
-  base::MockTimer* mock_timer = new base::MockTimer(false, false);
-  observer.set_mock_timer(base::WrapUnique(mock_timer));
-
-  PageLoadTiming timing;
-  timing.navigation_start = nav_start;
-  observer.ExpectPageLoadTiming(timing);
-  observer.DidCommitProvisionalLoad(true, false);
-  mock_timer->Fire();
-
-  timing.first_layout = first_layout;
-  timing.dom_content_loaded_event_start = dom_event;
-  timing.load_event_start = load_event;
-  observer.ExpectPageLoadTiming(timing);
-  observer.DidChangePerformanceTiming();
-  mock_timer->Fire();
-
-  // At this point, we should have triggered the generation of two metrics.
-  // Verify and reset the observer's expectations before moving on to the next
-  // part of the test.
-  observer.VerifyExpectedTimings();
-
-  base::Time nav_start_2 = base::Time::FromDoubleT(100);
-  base::TimeDelta first_layout_2 = base::TimeDelta::FromMillisecondsD(20);
-  base::TimeDelta dom_event_2 = base::TimeDelta::FromMillisecondsD(20);
-  base::TimeDelta load_event_2 = base::TimeDelta::FromMillisecondsD(20);
-  PageLoadTiming timing_2;
-  timing_2.navigation_start = nav_start_2;
-
-  base::MockTimer* mock_timer2 = new base::MockTimer(false, false);
-  observer.set_mock_timer(base::WrapUnique(mock_timer2));
-
-  observer.ExpectPageLoadTiming(timing_2);
-  observer.DidCommitProvisionalLoad(true, false);
-  mock_timer2->Fire();
-
-  timing_2.first_layout = first_layout_2;
-  timing_2.dom_content_loaded_event_start = dom_event_2;
-  timing_2.load_event_start = load_event_2;
-  observer.ExpectPageLoadTiming(timing_2);
-
-  observer.DidChangePerformanceTiming();
-  mock_timer2->Fire();
-}
-
-}  // namespace page_load_metrics