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// Copyright (c) 2012 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 <stddef.h>
#include <map>
#include "base/macros.h"
#include "base/metrics/field_trial.h"
#include "base/metrics/histogram.h"
#include "base/metrics/statistics_recorder.h"
#include "base/test/user_action_tester.h"
#include "chrome/browser/extensions/extension_apitest.h"
#include "components/variations/variations_associated_data.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::HistogramType type;
int min;
int max;
size_t buckets;
int count;
} g_histograms[] = {
{"test.h.1", base::HISTOGRAM, 1, 100, 50, 1}, // custom
{"test.h.2", base::LINEAR_HISTOGRAM, 1, 200, 50, 1}, // custom
{"test.h.3", base::LINEAR_HISTOGRAM, 1, 101, 102, 2}, // percentage
{"test.sparse.1", base::SPARSE_HISTOGRAM, 0, 0, 0, 1},
{"test.sparse.2", base::SPARSE_HISTOGRAM, 0, 0, 0, 2},
{"test.sparse.3", base::SPARSE_HISTOGRAM, 0, 0, 0, 6},
{"test.time", base::HISTOGRAM, 1, 10000, 50, 1},
{"test.medium.time", base::HISTOGRAM, 1, 180000, 50, 1},
{"test.long.time", base::HISTOGRAM, 1, 3600000, 50, 1},
{"test.count", base::HISTOGRAM, 1, 1000000, 50, 1},
{"test.medium.count", base::HISTOGRAM, 1, 10000, 50, 1},
{"test.small.count", base::HISTOGRAM, 1, 100, 50, 1},
{"test.bucketchange.linear", base::LINEAR_HISTOGRAM, 1, 100, 10, 2},
{"test.bucketchange.log", base::HISTOGRAM, 1, 100, 10, 2}, };
// Represents a bucket in a sparse histogram.
struct Bucket {
int histogram_value;
int count;
};
// We expect the following sparse histograms.
struct SparseHistogram {
const char* name;
int bucket_count;
Bucket buckets[10];
} g_sparse_histograms[] = {
{"test.sparse.1", 1, {{42, 1}}},
{"test.sparse.2", 1, {{24, 2}}},
{"test.sparse.3", 3, {{1, 1}, {2, 2}, {3, 3}}}};
void ValidateUserActions(const base::UserActionTester& user_action_tester,
const RecordedUserAction* recorded,
int count) {
for (int i = 0; i < count; ++i) {
const RecordedUserAction& ua = recorded[i];
EXPECT_EQ(ua.count, user_action_tester.GetActionCount(ua.name));
}
}
void ValidateSparseHistogramSamples(
const std::string& name,
const base::HistogramSamples& samples) {
for (unsigned int i = 0; i < arraysize(g_sparse_histograms); ++i) {
const SparseHistogram& sparse_histogram = g_sparse_histograms[i];
if (std::string(name) == sparse_histogram.name) {
for (int j = 0; j < sparse_histogram.bucket_count; ++j) {
const Bucket& bucket = sparse_histogram.buckets[j];
EXPECT_EQ(bucket.count, samples.GetCount(bucket.histogram_value));
}
}
}
}
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::HistogramBase* histogram(histograms[j]);
if (r.name == histogram->histogram_name()) {
scoped_ptr<base::HistogramSamples> snapshot =
histogram->SnapshotSamples();
base::HistogramBase::Count sample_count = snapshot->TotalCount();
EXPECT_EQ(r.count, sample_count);
EXPECT_EQ(r.type, histogram->GetHistogramType());
if (r.type == base::SPARSE_HISTOGRAM) {
ValidateSparseHistogramSamples(r.name, *snapshot);
} else {
EXPECT_TRUE(
histogram->HasConstructionArguments(r.min, r.max, r.buckets));
}
break;
}
}
EXPECT_LT(j, histograms.size());
}
}
} // anonymous namespace
IN_PROC_BROWSER_TEST_F(ExtensionApiTest, Metrics) {
base::UserActionTester user_action_tester;
base::FieldTrialList::CreateFieldTrial("apitestfieldtrial2", "group1");
std::map<std::string, std::string> params;
params["a"] = "aa";
params["b"] = "bb";
ASSERT_TRUE(variations::AssociateVariationParams(
"apitestfieldtrial2", "group1", params));
ASSERT_TRUE(RunComponentExtensionTest("metrics")) << message_;
ValidateUserActions(user_action_tester, g_user_actions,
arraysize(g_user_actions));
ValidateHistograms(g_histograms, arraysize(g_histograms));
}
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