Moving metrics to api/ .

chrome/browser/extensions/extension_metrics_apitest.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.
-
-#include <map>
-
-#include "base/metrics/histogram.h"
-#include "chrome/browser/extensions/extension_apitest.h"
-#include "content/public/browser/notification_registrar.h"
-#include "content/public/browser/notification_service.h"
-
-namespace {
-
-// The tests that are run by this extension are expected to record the following
-// user actions, with the specified counts.  If the tests in test.js are
-// modified, this array may need to be updated.
-struct RecordedUserAction {
-  const char* name;
-  int count;  // number of times the metric was recorded.
-} g_user_actions[] = {
-  {"test.ua.1", 1},
-  {"test.ua.2", 2},
-};
-
-// The tests that are run by this extension are expected to record the following
-// histograms.  If the tests in test.js are modified, this array may need to be
-// updated.
-struct RecordedHistogram {
-  const char* name;
-  base::Histogram::ClassType type;
-  int min;
-  int max;
-  size_t buckets;
-} g_histograms[] = {
-  {"test.h.1", base::Histogram::HISTOGRAM, 1, 100, 50},  // custom
-  {"test.h.2", base::Histogram::LINEAR_HISTOGRAM, 1, 200, 50},  // custom
-  {"test.h.3", base::Histogram::LINEAR_HISTOGRAM, 1, 101, 102},  // percentage
-  {"test.time", base::Histogram::HISTOGRAM, 1, 10000, 50},
-  {"test.medium.time", base::Histogram::HISTOGRAM, 1, 180000, 50},
-  {"test.long.time", base::Histogram::HISTOGRAM, 1, 3600000, 50},
-  {"test.count", base::Histogram::HISTOGRAM, 1, 1000000, 50},
-  {"test.medium.count", base::Histogram::HISTOGRAM, 1, 10000, 50},
-  {"test.small.count", base::Histogram::HISTOGRAM, 1, 100, 50},
-};
-
-// This class observes and collects user action notifications that are sent
-// by the tests, so that they can be examined afterwards for correctness.
-class UserActionObserver : public content::NotificationObserver {
- public:
-  UserActionObserver();
-
-  void ValidateUserActions(const RecordedUserAction* recorded, int count);
-
-  virtual void Observe(int type,
-                       const content::NotificationSource& source,
-                       const content::NotificationDetails& details);
-
- private:
-  typedef std::map<std::string, int> UserActionCountMap;
-
-  int num_metrics() const {
-    return count_map_.size();
-  }
-
-  int GetMetricCount(const std::string& name) const {
-    UserActionCountMap::const_iterator i = count_map_.find(name);
-    return i == count_map_.end() ? -1 : i->second;
-  }
-
-  content::NotificationRegistrar registrar_;
-  UserActionCountMap count_map_;
-};
-
-UserActionObserver::UserActionObserver() {
-  registrar_.Add(this, content::NOTIFICATION_USER_ACTION,
-                 content::NotificationService::AllSources());
-}
-
-void UserActionObserver::Observe(int type,
-                                 const content::NotificationSource& source,
-                                 const content::NotificationDetails& details) {
-  const char* name = *content::Details<const char*>(details).ptr();
-  ++(count_map_[name]);
-}
-
-void UserActionObserver::ValidateUserActions(const RecordedUserAction* recorded,
-                                             int count) {
-  EXPECT_EQ(count, num_metrics());
-
-  for (int i = 0; i < count; ++i) {
-    const RecordedUserAction& ua = recorded[i];
-    EXPECT_EQ(ua.count, GetMetricCount(ua.name));
-  }
-}
-
-void ValidateHistograms(const RecordedHistogram* recorded,
-                        int count) {
-  base::StatisticsRecorder::Histograms histograms;
-  base::StatisticsRecorder::GetHistograms(&histograms);
-
-  // Code other than the tests tun here will record some histogram values, but
-  // we will ignore those. This function validates that all the histogram we
-  // expect to see are present in the list, and that their basic info is
-  // correct.
-  for (int i = 0; i < count; ++i) {
-    const RecordedHistogram& r = recorded[i];
-    size_t j = 0;
-    for (j = 0; j < histograms.size(); ++j) {
-      base::Histogram* histogram(histograms[j]);
-
-      if (r.name == histogram->histogram_name()) {
-        EXPECT_EQ(r.type, histogram->histogram_type());
-        EXPECT_EQ(r.min, histogram->declared_min());
-        EXPECT_EQ(r.max, histogram->declared_max());
-        EXPECT_EQ(r.buckets, histogram->bucket_count());
-        break;
-      }
-    }
-    EXPECT_LT(j, histograms.size());
-  }
-}
-
-}  // anonymous namespace
-
-IN_PROC_BROWSER_TEST_F(ExtensionApiTest, Metrics) {
-  UserActionObserver observer;
-
-  ASSERT_TRUE(RunComponentExtensionTest("metrics")) << message_;
-
-  observer.ValidateUserActions(g_user_actions, arraysize(g_user_actions));
-  ValidateHistograms(g_histograms, arraysize(g_histograms));
-}