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// 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));
}
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