[Smart Lock] Measure clicks on the lock icon during Easy Unlock's trial run.

chrome/browser/signin/easy_unlock_screenlock_state_handler_unittest.cc

 // Copyright 2014 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 "chrome/browser/signin/easy_unlock_screenlock_state_handler.h"
+
 #include <string>
 #include <vector>
 
 #include "base/strings/string16.h"
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
-#include "chrome/browser/signin/easy_unlock_screenlock_state_handler.h"
+#include "base/test/histogram_tester.h"
+#include "chrome/browser/signin/easy_unlock_metrics.h"
 #include "chrome/browser/signin/easy_unlock_service.h"
 #include "chrome/browser/signin/screenlock_bridge.h"
 #include "chrome/grit/generated_resources.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/base/l10n/l10n_util.h"
 
 namespace {
 
 // Icons used by EasyUnlockScreenlockStateHandler. The icon id values are the
 // same as the ones set by ScreenlockBridge.
@@ skipping 722 matching lines @@
   hardlock_states.push_back(EasyUnlockScreenlockStateHandler::LOGIN_FAILED);
 
   for (size_t i = 0; i < hardlock_states.size(); ++i) {
     state_handler_->SetHardlockState(hardlock_states[i]);
     EXPECT_EQ(ScreenlockBridge::LockHandler::ONLINE_SIGN_IN,
               lock_handler_->GetAuthType(user_email_));
     EXPECT_FALSE(lock_handler_->HasCustomIcon());
   }
 }
 
+TEST_F(EasyUnlockScreenlockStateHandlerTest, TrialRunMetrics) {
+  base::HistogramTester histogram_tester;
+
+  // Simulate the user clicking on the lock icon twice outside of a trial run.
+  // No trial run metrics should be recorded.
+  state_handler_->RecordClickOnLockIcon();
+  state_handler_->RecordClickOnLockIcon();
+  histogram_tester.ExpectTotalCount("EasyUnlock.TrialRun.Events", 0);
+
+  // Simulate the user clicking on the lock icon three times during a trial run.
+  state_handler_->SetTrialRun();
+  state_handler_->RecordClickOnLockIcon();
+  state_handler_->RecordClickOnLockIcon();
+  state_handler_->RecordClickOnLockIcon();
+  histogram_tester.ExpectTotalCount("EasyUnlock.TrialRun.Events", 4);
+  histogram_tester.ExpectBucketCount("EasyUnlock.TrialRun.Events",
+                                     EASY_UNLOCK_TRIAL_RUN_EVENT_LAUNCHED, 1);
+  histogram_tester.ExpectBucketCount(
+      "EasyUnlock.TrialRun.Events",
+      EASY_UNLOCK_TRIAL_RUN_EVENT_CLICKED_LOCK_ICON, 3);
+}
+
 }  // namespace