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// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <stddef.h>
#include <array>
#include <map>
#include "base/containers/span.h"
#include "base/metrics/field_trial.h"
#include "base/metrics/field_trial_params.h"
#include "base/metrics/histogram_macros.h"
#include "base/metrics/statistics_recorder.h"
#include "base/test/metrics/user_action_tester.h"
#include "chrome/browser/extensions/extension_apitest.h"
#include "content/public/test/browser_test.h"
namespace extensions {
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.
constexpr 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.
constexpr 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.
constexpr struct SparseHistogram {
const char* name;
int bucket_count;
std::array<Bucket, 3> buckets;
} 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,
base::span<const RecordedUserAction> recorded) {
for (const auto& ua : recorded) {
EXPECT_EQ(ua.count, user_action_tester.GetActionCount(ua.name));
}
}
void ValidateSparseHistogramSamples(
const std::string& name,
const base::HistogramSamples& samples) {
for (const auto& sparse_histogram : g_sparse_histograms) {
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(base::span<const RecordedHistogram> recorded) {
const base::StatisticsRecorder::Histograms histograms =
base::StatisticsRecorder::GetHistograms();
// 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 (const auto& r : recorded) {
size_t j = 0;
for (j = 0; j < histograms.size(); ++j) {
base::HistogramBase* histogram(histograms[j]);
if (std::string(r.name) == histogram->histogram_name()) {
std::unique_ptr<base::HistogramSamples> snapshot =
histogram->SnapshotSamples();
base::HistogramBase::Count32 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());
}
}
} // namespace
using ContextType = extensions::browser_test_util::ContextType;
class ExtensionMetricsApiTest
: public ExtensionApiTest,
public testing::WithParamInterface<ContextType> {
public:
ExtensionMetricsApiTest() : ExtensionApiTest(GetParam()) {}
~ExtensionMetricsApiTest() override = default;
ExtensionMetricsApiTest(const ExtensionMetricsApiTest&) = delete;
ExtensionMetricsApiTest& operator=(const ExtensionMetricsApiTest&) = delete;
};
INSTANTIATE_TEST_SUITE_P(PersistentBackground,
ExtensionMetricsApiTest,
::testing::Values(ContextType::kPersistentBackground));
INSTANTIATE_TEST_SUITE_P(ServiceWorker,
ExtensionMetricsApiTest,
::testing::Values(ContextType::kServiceWorker));
IN_PROC_BROWSER_TEST_P(ExtensionMetricsApiTest, Metrics) {
base::UserActionTester user_action_tester;
base::FieldTrialList::CreateFieldTrial("apitestfieldtrial2", "group1");
ASSERT_TRUE(base::AssociateFieldTrialParams("apitestfieldtrial2", "group1",
{{"a", "aa"}, {"b", "bb"}}));
ASSERT_TRUE(RunExtensionTest("metrics", {}, {.load_as_component = true}))
<< message_;
ValidateUserActions(user_action_tester, g_user_actions);
ValidateHistograms(g_histograms);
}
} // namespace extensions
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