Delivering the FIRST_NONEMPTY_PAINT phase changing event to base/

components/metrics/profiler/tracking_synchronizer_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 "base/memory/ref_counted.h"
+#include "base/test/simple_test_tick_clock.h"
 #include "base/tracked_objects.h"
 #include "components/metrics/profiler/tracking_synchronizer.h"
 #include "components/metrics/profiler/tracking_synchronizer_observer.h"
 #include "content/public/test/test_browser_thread_bundle.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 using tracked_objects::ProcessDataPhaseSnapshot;
 using tracked_objects::TaskSnapshot;
 
 namespace metrics {
 
 namespace {
 
 class TestObserver : public TrackingSynchronizerObserver {
  public:
   TestObserver() {}
 
   ~TestObserver() override {
     EXPECT_TRUE(got_phase_0_);
     EXPECT_TRUE(got_phase_1_);
   }
 
   void ReceivedProfilerData(
       const tracked_objects::ProcessDataPhaseSnapshot& process_data_phase,
       base::ProcessId process_id,
       content::ProcessType process_type,
       int profiling_phase,
-      base::TimeDelta phase_start,
-      base::TimeDelta phase_finish,
+      base::TimeTicks phase_start,
+      base::TimeTicks phase_finish,
       const ProfilerEvents& past_events) override {
     EXPECT_EQ(static_cast<base::ProcessId>(239), process_id);
     EXPECT_EQ(content::ProcessType::PROCESS_TYPE_PLUGIN, process_type);
     ASSERT_EQ(1u, process_data_phase.tasks.size());
 
     switch (profiling_phase) {
       case 0:
         EXPECT_FALSE(got_phase_0_);
         got_phase_0_ = true;
 
-        EXPECT_EQ(base::TimeDelta::FromMilliseconds(0), phase_start);
-        EXPECT_EQ(base::TimeDelta::FromMilliseconds(222), phase_finish);
+        EXPECT_EQ(base::TimeTicks() + base::TimeDelta::FromMilliseconds(111),
+                  phase_start);
+        EXPECT_EQ(base::TimeTicks() + base::TimeDelta::FromMilliseconds(333),
+                  phase_finish);
 
         EXPECT_EQ("death_thread0",
                   process_data_phase.tasks[0].death_thread_name);
         EXPECT_EQ(0u, past_events.size());
         break;
 
       case 1:
         EXPECT_FALSE(got_phase_1_);
         got_phase_1_ = true;
 
-        EXPECT_EQ(base::TimeDelta::FromMilliseconds(222), phase_start);
-        EXPECT_EQ(base::TimeDelta::FromMilliseconds(666), phase_finish);
+        EXPECT_EQ(base::TimeTicks() + base::TimeDelta::FromMilliseconds(333),
+                  phase_start);
+        EXPECT_EQ(base::TimeTicks() + base::TimeDelta::FromMilliseconds(777),
+                  phase_finish);
 
         EXPECT_EQ("death_thread1",
                   process_data_phase.tasks[0].death_thread_name);
         ASSERT_EQ(1u, past_events.size());
         EXPECT_EQ(ProfilerEventProto::EVENT_FIRST_NONEMPTY_PAINT,
                   past_events[0]);
         break;
 
       default:
         bool profiling_phase_is_neither_0_nor_1 = true;
         EXPECT_FALSE(profiling_phase_is_neither_0_nor_1);
     }
   }
 
  private:
   bool got_phase_0_ = false;
   bool got_phase_1_ = false;
 
   DISALLOW_COPY_AND_ASSIGN(TestObserver);
 };
 
-base::TimeTicks TestTimeFromMs(int64 ms) {
-  return base::TimeTicks() + base::TimeDelta::FromMilliseconds(ms);
-}
+class TestTrackingSynchronizer : public TrackingSynchronizer {
+ public:
+  explicit TestTrackingSynchronizer(scoped_ptr<base::TickClock> clock)
+      : TrackingSynchronizer(clock.Pass()) {}
+
+  ~TestTrackingSynchronizer() {}
+
+  using TrackingSynchronizer::RegisterPhaseCompletion;
+  using TrackingSynchronizer::SendData;
+};
 
 }  // namespace
 
 TEST(TrackingSynchronizerTest, ProfilerData) {
   // Testing how TrackingSynchronizer reports 2 phases of profiling.
 #if !defined(OS_IOS)
   content::TestBrowserThreadBundle thread_bundle;
 #endif
-  scoped_refptr<TrackingSynchronizer> tracking_synchronizer =
-      new TrackingSynchronizer(TestTimeFromMs(111));
 
-  // Mimic a phase change event.
-  tracking_synchronizer->phase_completion_events_sequence_.push_back(
+  auto clock = new base::SimpleTestTickClock();  // Will be owned by
+                                                 // |tracking_synchronizer|.
+  clock->Advance(base::TimeDelta::FromMilliseconds(111));
+
+  scoped_refptr<TestTrackingSynchronizer> tracking_synchronizer =
+      new TestTrackingSynchronizer(make_scoped_ptr(clock));
+
+  clock->Advance(base::TimeDelta::FromMilliseconds(222));
+
+  tracking_synchronizer->RegisterPhaseCompletion(
       ProfilerEventProto::EVENT_FIRST_NONEMPTY_PAINT);
-  tracking_synchronizer->phase_start_times_.push_back(TestTimeFromMs(333));
 
   tracked_objects::ProcessDataSnapshot profiler_data;
   ProcessDataPhaseSnapshot snapshot0;
   tracked_objects::TaskSnapshot task_snapshot0;
   task_snapshot0.death_thread_name = "death_thread0";
   snapshot0.tasks.push_back(task_snapshot0);
   ProcessDataPhaseSnapshot snapshot1;
   profiler_data.phased_process_data_snapshots[0] = snapshot0;
   tracked_objects::TaskSnapshot task_snapshot1;
   task_snapshot1.death_thread_name = "death_thread1";
   snapshot1.tasks.push_back(task_snapshot1);
   profiler_data.phased_process_data_snapshots[1] = snapshot1;
   profiler_data.process_id = 239;
 
+  clock->Advance(base::TimeDelta::FromMilliseconds(444));
   TestObserver test_observer;
-  tracking_synchronizer->SendData(profiler_data,
-                                  content::ProcessType::PROCESS_TYPE_PLUGIN,
-                                  TestTimeFromMs(777), &test_observer);
+  tracking_synchronizer->SendData(
+      profiler_data, content::ProcessType::PROCESS_TYPE_PLUGIN, &test_observer);
 }
 
 }  // namespace metrics