Support incremental-max and sample in Profiler data

base/tracked_objects_unittest.cc

 // Copyright (c) 2011 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.
 
 // Test of classes in the tracked_objects.h classes.
 
 #include "base/tracked_objects.h"
 
 #include "base/json/json_writer.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 27 matching lines @@
   if (!ThreadData::InitializeAndSetTrackingStatus(true))
     return;
 
   EXPECT_FALSE(ThreadData::first());  // No activity even on this thread.
   ThreadData* data = ThreadData::Get();
   EXPECT_TRUE(ThreadData::first());  // Now class was constructed.
   EXPECT_TRUE(data);
   EXPECT_TRUE(!data->next());
   EXPECT_EQ(data, ThreadData::Get());
   ThreadData::BirthMap birth_map;
-  data->SnapshotBirthMap(&birth_map);
+  ThreadData::DeathMap death_map;
+  data->SnapshotMaps(false, &birth_map, &death_map);
   EXPECT_EQ(0u, birth_map.size());
-  ThreadData::DeathMap death_map;
-  data->SnapshotDeathMap(&death_map);
   EXPECT_EQ(0u, death_map.size());
   // Cleanup with no leaking.
   ShutdownSingleThreadedCleanup(false);
 
   // Do it again, just to be sure we reset state completely.
   ThreadData::InitializeAndSetTrackingStatus(true);
   EXPECT_FALSE(ThreadData::first());  // No activity even on this thread.
   data = ThreadData::Get();
   EXPECT_TRUE(ThreadData::first());  // Now class was constructed.
   EXPECT_TRUE(data);
   EXPECT_TRUE(!data->next());
   EXPECT_EQ(data, ThreadData::Get());
   birth_map.clear();
-  data->SnapshotBirthMap(&birth_map);
+  death_map.clear();
+  data->SnapshotMaps(false, &birth_map, &death_map);
   EXPECT_EQ(0u, birth_map.size());
-  death_map.clear();
-  data->SnapshotDeathMap(&death_map);
   EXPECT_EQ(0u, death_map.size());
 }
 
 TEST_F(TrackedObjectsTest, TinyStartupShutdown) {
   if (!ThreadData::InitializeAndSetTrackingStatus(true))
     return;
 
   // Instigate tracking on a single tracked object, on our thread.
   const Location& location = FROM_HERE;
   ThreadData::TallyABirthIfActive(location);
 
-  const ThreadData* data = ThreadData::first();
+  ThreadData* data = ThreadData::first();
   ASSERT_TRUE(data);
   EXPECT_TRUE(!data->next());
   EXPECT_EQ(data, ThreadData::Get());
   ThreadData::BirthMap birth_map;
-  data->SnapshotBirthMap(&birth_map);
+  ThreadData::DeathMap death_map;
+  data->SnapshotMaps(false, &birth_map, &death_map);
   EXPECT_EQ(1u, birth_map.size());                         // 1 birth location.
   EXPECT_EQ(1, birth_map.begin()->second->birth_count());  // 1 birth.
-  ThreadData::DeathMap death_map;
-  data->SnapshotDeathMap(&death_map);
   EXPECT_EQ(0u, death_map.size());                         // No deaths.
 
 
   // Now instigate another birth, and a first death at the same location.
   // TrackingInfo will call TallyABirth() during construction.
   base::TimeTicks kBogusStartTime;
   base::TrackingInfo pending_task(location, kBogusStartTime);
   TrackedTime kBogusStartRunTime;
   TrackedTime kBogusEndRunTime;
   ThreadData::TallyRunOnNamedThreadIfTracking(pending_task, kBogusStartRunTime,
                                               kBogusEndRunTime);
 
   birth_map.clear();
-  data->SnapshotBirthMap(&birth_map);
+  death_map.clear();
+  data->SnapshotMaps(false, &birth_map, &death_map);
   EXPECT_EQ(1u, birth_map.size());                         // 1 birth location.
   EXPECT_EQ(2, birth_map.begin()->second->birth_count());  // 2 births.
-  death_map.clear();
-  data->SnapshotDeathMap(&death_map);
   EXPECT_EQ(1u, death_map.size());                         // 1 location.
   EXPECT_EQ(1, death_map.begin()->second.count());         // 1 death.
 
   // The births were at the same location as the one known death.
   EXPECT_EQ(birth_map.begin()->second, death_map.begin()->first);
 }
 
 TEST_F(TrackedObjectsTest, DeathDataTest) {
   if (!ThreadData::InitializeAndSetTrackingStatus(true))
     return;
 
   scoped_ptr<DeathData> data(new DeathData());
   ASSERT_NE(data, reinterpret_cast<DeathData*>(NULL));
-  EXPECT_EQ(data->run_duration(), 0);
-  EXPECT_EQ(data->queue_duration(), 0);
-  EXPECT_EQ(data->AverageMsRunDuration(), 0);
-  EXPECT_EQ(data->AverageMsQueueDuration(), 0);
+  EXPECT_EQ(data->run_duration_sum(), 0);
+  EXPECT_EQ(data->run_duration_sample(), 0);
+  EXPECT_EQ(data->queue_duration_sum(), 0);
+  EXPECT_EQ(data->queue_duration_sample(), 0);
   EXPECT_EQ(data->count(), 0);
 
   DurationInt run_ms = 42;
   DurationInt queue_ms = 8;
 
-  data->RecordDeath(queue_ms, run_ms);
-  EXPECT_EQ(data->run_duration(), run_ms);
-  EXPECT_EQ(data->queue_duration(), queue_ms);
-  EXPECT_EQ(data->AverageMsRunDuration(), run_ms);
-  EXPECT_EQ(data->AverageMsQueueDuration(), queue_ms);
+  const int kUnrandomInt = 0;  // Fake random int that ensure we sample data.
+  data->RecordDeath(queue_ms, run_ms, kUnrandomInt);
+  EXPECT_EQ(data->run_duration_sum(), run_ms);
+  EXPECT_EQ(data->run_duration_sample(), run_ms);
+  EXPECT_EQ(data->queue_duration_sum(), queue_ms);
+  EXPECT_EQ(data->queue_duration_sample(), queue_ms);
   EXPECT_EQ(data->count(), 1);
 
-  data->RecordDeath(queue_ms, run_ms);
-  EXPECT_EQ(data->run_duration(), run_ms + run_ms);
-  EXPECT_EQ(data->queue_duration(), queue_ms + queue_ms);
-  EXPECT_EQ(data->AverageMsRunDuration(), run_ms);
-  EXPECT_EQ(data->AverageMsQueueDuration(), queue_ms);
+  data->RecordDeath(queue_ms, run_ms, kUnrandomInt);
+  EXPECT_EQ(data->run_duration_sum(), run_ms + run_ms);
+  EXPECT_EQ(data->run_duration_sample(), run_ms);
+  EXPECT_EQ(data->queue_duration_sum(), queue_ms + queue_ms);
+  EXPECT_EQ(data->queue_duration_sample(), queue_ms);
   EXPECT_EQ(data->count(), 2);
 
   scoped_ptr<base::DictionaryValue> dictionary(data->ToValue());
   int integer;
   EXPECT_TRUE(dictionary->GetInteger("run_ms", &integer));
   EXPECT_EQ(integer, 2 * run_ms);
+  EXPECT_TRUE(dictionary->GetInteger("run_ms_sample", &integer));
+  EXPECT_EQ(integer, run_ms);
   EXPECT_TRUE(dictionary->GetInteger("queue_ms", &integer));
   EXPECT_EQ(integer, 2 * queue_ms);
+  EXPECT_TRUE(dictionary->GetInteger("queue_ms_sample", &integer));
+  EXPECT_EQ(integer, queue_ms);
   EXPECT_TRUE(dictionary->GetInteger("count", &integer));
   EXPECT_EQ(integer, 2);
 
   scoped_ptr<base::Value> value(data->ToValue());
   std::string json;
   base::JSONWriter::Write(value.get(), false, &json);
   std::string birth_only_result = "{"
       "\"count\":2,"
       "\"queue_ms\":16,"
       "\"queue_ms_max\":8,"
+      "\"queue_ms_sample\":8,"
       "\"run_ms\":84,"
-      "\"run_ms_max\":42"
+      "\"run_ms_max\":42,"
+      "\"run_ms_sample\":42"
       "}";
   EXPECT_EQ(birth_only_result, json);
 }
 
 TEST_F(TrackedObjectsTest, DeactivatedBirthOnlyToValueWorkerThread) {
   // Transition to Deactivated state before doing anything.
   if (!ThreadData::InitializeAndSetTrackingStatus(false))
     return;
   // We don't initialize system with a thread name, so we're viewed as a worker
   // thread.
   const int kFakeLineNumber = 173;
   const char* kFile = "FixedFileName";
   const char* kFunction = "BirthOnlyToValueWorkerThread";
   Location location(kFunction, kFile, kFakeLineNumber, NULL);
   Births* birth = ThreadData::TallyABirthIfActive(location);
   // We should now see a NULL birth record.
   EXPECT_EQ(birth, reinterpret_cast<Births*>(NULL));
 
-  scoped_ptr<base::Value> value(ThreadData::ToValue());
+  scoped_ptr<base::Value> value(ThreadData::ToValue(false));
   std::string json;
   base::JSONWriter::Write(value.get(), false, &json);
   std::string birth_only_result = "{"
       "\"list\":["
       "]"
     "}";
   EXPECT_EQ(json, birth_only_result);
 }
 
 TEST_F(TrackedObjectsTest, DeactivatedBirthOnlyToValueMainThread) {
   // Start in the deactivated state.
   if (!ThreadData::InitializeAndSetTrackingStatus(false))
     return;
 
   // Use a well named thread.
   ThreadData::InitializeThreadContext("SomeMainThreadName");
   const int kFakeLineNumber = 173;
   const char* kFile = "FixedFileName";
   const char* kFunction = "BirthOnlyToValueMainThread";
   Location location(kFunction, kFile, kFakeLineNumber, NULL);
   // Do not delete birth.  We don't own it.
   Births* birth = ThreadData::TallyABirthIfActive(location);
   // We expect to not get a birth record.
   EXPECT_EQ(birth, reinterpret_cast<Births*>(NULL));
 
-  scoped_ptr<base::Value> value(ThreadData::ToValue());
+  scoped_ptr<base::Value> value(ThreadData::ToValue(false));
   std::string json;
   base::JSONWriter::Write(value.get(), false, &json);
   std::string birth_only_result = "{"
       "\"list\":["
       "]"
     "}";
   EXPECT_EQ(json, birth_only_result);
 }
 
 TEST_F(TrackedObjectsTest, BirthOnlyToValueWorkerThread) {
   if (!ThreadData::InitializeAndSetTrackingStatus(true))
     return;
   // We don't initialize system with a thread name, so we're viewed as a worker
   // thread.
   const int kFakeLineNumber = 173;
   const char* kFile = "FixedFileName";
   const char* kFunction = "BirthOnlyToValueWorkerThread";
   Location location(kFunction, kFile, kFakeLineNumber, NULL);
   Births* birth = ThreadData::TallyABirthIfActive(location);
   EXPECT_NE(birth, reinterpret_cast<Births*>(NULL));
 
-  scoped_ptr<base::Value> value(ThreadData::ToValue());
+  scoped_ptr<base::Value> value(ThreadData::ToValue(false));
   std::string json;
   base::JSONWriter::Write(value.get(), false, &json);
   std::string birth_only_result = "{"
       "\"list\":["
         "{"
           "\"birth_thread\":\"WorkerThread-1\","
           "\"death_data\":{"
             "\"count\":1,"
             "\"queue_ms\":0,"
             "\"queue_ms_max\":0,"
+            "\"queue_ms_sample\":0,"
             "\"run_ms\":0,"
-            "\"run_ms_max\":0"
+            "\"run_ms_max\":0,"
+            "\"run_ms_sample\":0"
           "},"
           "\"death_thread\":\"Still_Alive\","
           "\"location\":{"
             "\"file_name\":\"FixedFileName\","
             "\"function_name\":\"BirthOnlyToValueWorkerThread\","
             "\"line_number\":173"
           "}"
         "}"
       "]"
     "}";
   EXPECT_EQ(json, birth_only_result);
 }
 
 TEST_F(TrackedObjectsTest, BirthOnlyToValueMainThread) {
   if (!ThreadData::InitializeAndSetTrackingStatus(true))
     return;
 
   // Use a well named thread.
   ThreadData::InitializeThreadContext("SomeMainThreadName");
   const int kFakeLineNumber = 173;
   const char* kFile = "FixedFileName";
   const char* kFunction = "BirthOnlyToValueMainThread";
   Location location(kFunction, kFile, kFakeLineNumber, NULL);
   // Do not delete birth.  We don't own it.
   Births* birth = ThreadData::TallyABirthIfActive(location);
   EXPECT_NE(birth, reinterpret_cast<Births*>(NULL));
 
-  scoped_ptr<base::Value> value(ThreadData::ToValue());
+  scoped_ptr<base::Value> value(ThreadData::ToValue(false));
   std::string json;
   base::JSONWriter::Write(value.get(), false, &json);
   std::string birth_only_result = "{"
       "\"list\":["
         "{"
           "\"birth_thread\":\"SomeMainThreadName\","
           "\"death_data\":{"
             "\"count\":1,"
             "\"queue_ms\":0,"
             "\"queue_ms_max\":0,"
+            "\"queue_ms_sample\":0,"
             "\"run_ms\":0,"
-            "\"run_ms_max\":0"
+            "\"run_ms_max\":0,"
+            "\"run_ms_sample\":0"
           "},"
           "\"death_thread\":\"Still_Alive\","
           "\"location\":{"
             "\"file_name\":\"FixedFileName\","
             "\"function_name\":\"BirthOnlyToValueMainThread\","
             "\"line_number\":173"
           "}"
         "}"
       "]"
     "}";
@@ skipping 20 matching lines @@
   // TrackingInfo will call TallyABirth() during construction.
   base::TrackingInfo pending_task(location, kDelayedStartTime);
   pending_task.time_posted = kTimePosted;  // Overwrite implied Now().
 
   const TrackedTime kStartOfRun = TrackedTime() +
       Duration::FromMilliseconds(5);
   const TrackedTime kEndOfRun = TrackedTime() + Duration::FromMilliseconds(7);
   ThreadData::TallyRunOnNamedThreadIfTracking(pending_task,
       kStartOfRun, kEndOfRun);
 
-  scoped_ptr<base::Value> value(ThreadData::ToValue());
+  scoped_ptr<base::Value> value(ThreadData::ToValue(false));
   std::string json;
   base::JSONWriter::Write(value.get(), false, &json);
   std::string one_line_result = "{"
       "\"list\":["
         "{"
           "\"birth_thread\":\"SomeMainThreadName\","
           "\"death_data\":{"
             "\"count\":1,"
             "\"queue_ms\":4,"
             "\"queue_ms_max\":4,"
+            "\"queue_ms_sample\":4,"
             "\"run_ms\":2,"
-            "\"run_ms_max\":2"
+            "\"run_ms_max\":2,"
+            "\"run_ms_sample\":2"
           "},"
           "\"death_thread\":\"SomeMainThreadName\","
           "\"location\":{"
             "\"file_name\":\"FixedFileName\","
             "\"function_name\":\"LifeCycleToValueMainThread\","
             "\"line_number\":236"
           "}"
         "}"
       "]"
     "}";
@@ skipping 27 matching lines @@
 
   // Turn off tracking now that we have births.
   EXPECT_TRUE(ThreadData::InitializeAndSetTrackingStatus(false));
 
   const TrackedTime kStartOfRun = TrackedTime() +
       Duration::FromMilliseconds(5);
   const TrackedTime kEndOfRun = TrackedTime() + Duration::FromMilliseconds(7);
   ThreadData::TallyRunOnNamedThreadIfTracking(pending_task,
       kStartOfRun, kEndOfRun);
 
-  scoped_ptr<base::Value> value(ThreadData::ToValue());
+  scoped_ptr<base::Value> value(ThreadData::ToValue(false));
   std::string json;
   base::JSONWriter::Write(value.get(), false, &json);
   std::string one_line_result = "{"
       "\"list\":["
         "{"
           "\"birth_thread\":\"SomeMainThreadName\","
           "\"death_data\":{"
             "\"count\":1,"
             "\"queue_ms\":4,"
             "\"queue_ms_max\":4,"
+            "\"queue_ms_sample\":4,"
             "\"run_ms\":2,"
-            "\"run_ms_max\":2"
+            "\"run_ms_max\":2,"
+            "\"run_ms_sample\":2"
           "},"
           "\"death_thread\":\"SomeMainThreadName\","
           "\"location\":{"
             "\"file_name\":\"FixedFileName\","
             "\"function_name\":\"LifeCycleToValueMainThread\","
             "\"line_number\":236"
           "}"
         "}"
       "]"
     "}";
@@ skipping 22 matching lines @@
   // TrackingInfo will call TallyABirth() during construction.
   base::TrackingInfo pending_task(location, kDelayedStartTime);
   pending_task.time_posted = kTimePosted;  // Overwrite implied Now().
 
   const TrackedTime kStartOfRun = TrackedTime() +
       Duration::FromMilliseconds(5);
   const TrackedTime kEndOfRun = TrackedTime() + Duration::FromMilliseconds(7);
   ThreadData::TallyRunOnNamedThreadIfTracking(pending_task,
       kStartOfRun, kEndOfRun);
 
-  scoped_ptr<base::Value> value(ThreadData::ToValue());
+  scoped_ptr<base::Value> value(ThreadData::ToValue(false));
   std::string json;
   base::JSONWriter::Write(value.get(), false, &json);
   std::string one_line_result = "{"
       "\"list\":["
       "]"
     "}";
   EXPECT_EQ(one_line_result, json);
 }
 
 TEST_F(TrackedObjectsTest, LifeCycleToValueWorkerThread) {
@@ skipping 11 matching lines @@
   Births* birth = ThreadData::TallyABirthIfActive(location);
   EXPECT_NE(birth, reinterpret_cast<Births*>(NULL));
 
   const TrackedTime kTimePosted = TrackedTime() + Duration::FromMilliseconds(1);
   const TrackedTime kStartOfRun = TrackedTime() +
       Duration::FromMilliseconds(5);
   const TrackedTime kEndOfRun = TrackedTime() + Duration::FromMilliseconds(7);
   ThreadData::TallyRunOnWorkerThreadIfTracking(birth, kTimePosted,
       kStartOfRun, kEndOfRun);
 
-  scoped_ptr<base::Value> value(ThreadData::ToValue());
+  // Call for the ToValue, but tell it to not the maxes after scanning.
+  scoped_ptr<base::Value> value(ThreadData::ToValue(false));
   std::string json;
   base::JSONWriter::Write(value.get(), false, &json);
   std::string one_line_result = "{"
       "\"list\":["
         "{"
           "\"birth_thread\":\"WorkerThread-1\","
           "\"death_data\":{"
             "\"count\":1,"
             "\"queue_ms\":4,"
             "\"queue_ms_max\":4,"
+            "\"queue_ms_sample\":4,"
             "\"run_ms\":2,"
-            "\"run_ms_max\":2"
+            "\"run_ms_max\":2,"
+            "\"run_ms_sample\":2"
           "},"
           "\"death_thread\":\"WorkerThread-1\","
           "\"location\":{"
             "\"file_name\":\"FixedFileName\","
             "\"function_name\":\"LifeCycleToValueWorkerThread\","
             "\"line_number\":236"
           "}"
         "}"
       "]"
     "}";
   EXPECT_EQ(one_line_result, json);
+
+  // Call for the ToValue, but tell it to reset the maxes after scanning.
+  // We'll still get the same values, but the data will be reset (which we'll
+  // see in a moment)

[ramant (doing other things), 2011/12/03 22:48:39]

nit: Add a period.

[jar (doing other things), 2011/12/04 00:46:22]

Done.

+  value.reset(ThreadData::ToValue(true));
+  base::JSONWriter::Write(value.get(), false, &json);
+  // Result should be unchanged.
+  EXPECT_EQ(one_line_result, json);
+
+  // Call for the ToValue, and now we'll see the result of the last translation,
+  // as the max will have been pushed back to zero.
+  value.reset(ThreadData::ToValue(false));
+  base::JSONWriter::Write(value.get(), false, &json);
+  std::string one_line_result_with_zeros = "{"
+      "\"list\":["
+        "{"
+          "\"birth_thread\":\"WorkerThread-1\","
+          "\"death_data\":{"
+            "\"count\":1,"
+            "\"queue_ms\":4,"
+            "\"queue_ms_max\":0,"  // Note zero here.
+            "\"queue_ms_sample\":4,"
+            "\"run_ms\":2,"
+            "\"run_ms_max\":0,"   // Note zero here.
+            "\"run_ms_sample\":2"
+          "},"
+          "\"death_thread\":\"WorkerThread-1\","
+          "\"location\":{"
+            "\"file_name\":\"FixedFileName\","
+            "\"function_name\":\"LifeCycleToValueWorkerThread\","
+            "\"line_number\":236"
+          "}"
+        "}"
+      "]"
+    "}";
+  EXPECT_EQ(one_line_result_with_zeros, json);
 }
 
 TEST_F(TrackedObjectsTest, TwoLives) {
   if (!ThreadData::InitializeAndSetTrackingStatus(true))
     return;
 
   // Use a well named thread.
   ThreadData::InitializeThreadContext("SomeFileThreadName");
   const int kFakeLineNumber = 222;
   const char* kFile = "AnotherFileName";
@@ skipping 17 matching lines @@
   ThreadData::TallyRunOnNamedThreadIfTracking(pending_task,
       kStartOfRun, kEndOfRun);
 
   // TrackingInfo will call TallyABirth() during construction.
   base::TrackingInfo pending_task2(location, kDelayedStartTime);
   pending_task2.time_posted = kTimePosted;  // Overwrite implied Now().
 
   ThreadData::TallyRunOnNamedThreadIfTracking(pending_task2,
       kStartOfRun, kEndOfRun);
 
-  scoped_ptr<base::Value> value(ThreadData::ToValue());
+  scoped_ptr<base::Value> value(ThreadData::ToValue(false));
   std::string json;
   base::JSONWriter::Write(value.get(), false, &json);
   std::string one_line_result = "{"
       "\"list\":["
         "{"
           "\"birth_thread\":\"SomeFileThreadName\","
           "\"death_data\":{"
             "\"count\":2,"
             "\"queue_ms\":8,"
             "\"queue_ms_max\":4,"
+            "\"queue_ms_sample\":4,"
             "\"run_ms\":4,"
-            "\"run_ms_max\":2"
+            "\"run_ms_max\":2,"
+            "\"run_ms_sample\":2"
           "},"
           "\"death_thread\":\"SomeFileThreadName\","
           "\"location\":{"
             "\"file_name\":\"AnotherFileName\","
             "\"function_name\":\"TwoLives\","
             "\"line_number\":222"
           "}"
         "}"
       "]"
     "}";
@@ skipping 24 matching lines @@
   ThreadData::TallyRunOnNamedThreadIfTracking(pending_task,
       kStartOfRun, kEndOfRun);
 
   const int kSecondFakeLineNumber = 999;
   Location second_location(kFunction, kFile, kSecondFakeLineNumber, NULL);
 
   // TrackingInfo will call TallyABirth() during construction.
   base::TrackingInfo pending_task2(second_location, kDelayedStartTime);
   pending_task2.time_posted = kTimePosted;  // Overwrite implied Now().
 
-  scoped_ptr<base::Value> value(ThreadData::ToValue());
+  scoped_ptr<base::Value> value(ThreadData::ToValue(false));
   std::string json;
   base::JSONWriter::Write(value.get(), false, &json);
   std::string one_line_result = "{"
       "\"list\":["
         "{"
           "\"birth_thread\":\"SomeFileThreadName\","
           "\"death_data\":{"
             "\"count\":1,"
             "\"queue_ms\":4,"
             "\"queue_ms_max\":4,"
+            "\"queue_ms_sample\":4,"
             "\"run_ms\":2,"
-            "\"run_ms_max\":2"
+            "\"run_ms_max\":2,"
+            "\"run_ms_sample\":2"
           "},"
           "\"death_thread\":\"SomeFileThreadName\","
           "\"location\":{"
             "\"file_name\":\"AnotherFileName\","
             "\"function_name\":\"DifferentLives\","
             "\"line_number\":567"
           "}"
         "},"
         "{"
           "\"birth_thread\":\"SomeFileThreadName\","
           "\"death_data\":{"
             "\"count\":1,"
             "\"queue_ms\":0,"
             "\"queue_ms_max\":0,"
+            "\"queue_ms_sample\":0,"
             "\"run_ms\":0,"
-            "\"run_ms_max\":0"
+            "\"run_ms_max\":0,"
+            "\"run_ms_sample\":0"
           "},"
           "\"death_thread\":\"Still_Alive\","
           "\"location\":{"
             "\"file_name\":\"AnotherFileName\","
             "\"function_name\":\"DifferentLives\","
             "\"line_number\":999"
           "}"
         "}"
       "]"
     "}";
   EXPECT_EQ(one_line_result, json);
 }
 
 
 }  // namespace tracked_objects