Metrics for feature engagement tracker.

components/feature_engagement_tracker/internal/feature_engagement_tracker_impl_unittest.cc

Index: components/feature_engagement_tracker/internal/feature_engagement_tracker_impl_unittest.cc
diff --git a/components/feature_engagement_tracker/internal/feature_engagement_tracker_impl_unittest.cc b/components/feature_engagement_tracker/internal/feature_engagement_tracker_impl_unittest.cc
index 605cf98c344f9d46375855a5dc46eed88b119039..0a01cb440a1b2dacd782970c4979e784b573420d 100644
--- a/components/feature_engagement_tracker/internal/feature_engagement_tracker_impl_unittest.cc
+++ b/components/feature_engagement_tracker/internal/feature_engagement_tracker_impl_unittest.cc
@@ -13,6 +13,7 @@
 #include "base/run_loop.h"
 #include "base/sequenced_task_runner.h"
 #include "base/single_thread_task_runner.h"
+#include "base/test/user_action_tester.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "components/feature_engagement_tracker/internal/availability_model_impl.h"
 #include "components/feature_engagement_tracker/internal/editable_configuration.h"
@@ -21,6 +22,7 @@
 #include "components/feature_engagement_tracker/internal/never_availability_model.h"
 #include "components/feature_engagement_tracker/internal/never_storage_validator.h"
 #include "components/feature_engagement_tracker/internal/once_condition_validator.h"
+#include "components/feature_engagement_tracker/internal/stats.h"
 #include "components/feature_engagement_tracker/internal/time_provider.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
@@ -439,10 +441,24 @@ TEST_F(FeatureEngagementTrackerImplTest, TestNotifyEvent) {
   tracker_->AddOnInitializedCallback(base::Bind(
       &StoringInitializedCallback::OnInitialized, base::Unretained(&callback)));
   base::RunLoop().RunUntilIdle();
+  base::UserActionTester user_action_tester;
 
   tracker_->NotifyEvent("foo");
   tracker_->NotifyEvent("foo");
   tracker_->NotifyEvent("bar");
+  tracker_->NotifyEvent(kTestFeatureFoo.name + std::string("_used"));
+  tracker_->NotifyEvent(kTestFeatureFoo.name + std::string("_trigger"));
+
+  // Used event will record both NotifyEvent and NotifyUsedEvent. Explicitly
+  // specify the whole user action string here.
+  EXPECT_EQ(1, user_action_tester.GetActionCount(
+                   "InProductHelp.NotifyUsedEvent.test_foo"));
+  EXPECT_EQ(2, user_action_tester.GetActionCount(
+                   "InProductHelp.NotifyEvent.test_foo"));
+  EXPECT_EQ(0, user_action_tester.GetActionCount(
+                   "InProductHelp.NotifyUsedEvent.test_bar"));
+  EXPECT_EQ(0, user_action_tester.GetActionCount(
+                   "InProductHelp.NotifyEvent.test_bar"));
 
   Event foo_event = store_->GetEvent("foo");
   ASSERT_EQ(1, foo_event.events_size());