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// 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 "components/cronet/histogram_manager.h"
#include <stdint.h>
#include <string>
#include "base/metrics/histogram_macros.h"
#include "base/metrics/statistics_recorder.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace cronet {
using metrics::ChromeUserMetricsExtension;
using metrics::HistogramEventProto;
TEST(HistogramManager, HistogramBucketFields) {
base::StatisticsRecorder::Initialize();
// Capture histograms at the start of the test to avoid later GetDeltas()
// calls picking them up.
std::vector<uint8_t> data_init;
HistogramManager::GetInstance()->GetDeltas(&data_init);
// kNoFlags filter should record all histograms.
UMA_HISTOGRAM_ENUMERATION("UmaHistogramManager", 1, 2);
std::vector<uint8_t> data;
EXPECT_TRUE(HistogramManager::GetInstance()->GetDeltas(&data));
EXPECT_FALSE(data.empty());
ChromeUserMetricsExtension uma_proto;
EXPECT_TRUE(uma_proto.ParseFromArray(
reinterpret_cast<const char*>(&data[0]), data.size()));
EXPECT_FALSE(data.empty());
const HistogramEventProto& histogram_proto =
uma_proto.histogram_event(uma_proto.histogram_event_size() - 1);
ASSERT_EQ(1, histogram_proto.bucket_size());
EXPECT_LE(0, histogram_proto.bucket(0).min());
EXPECT_LE(2, histogram_proto.bucket(0).max());
EXPECT_EQ(1, histogram_proto.bucket(0).count());
UMA_HISTOGRAM_ENUMERATION("UmaHistogramManager2", 2, 3);
std::vector<uint8_t> data2;
EXPECT_TRUE(HistogramManager::GetInstance()->GetDeltas(&data2));
EXPECT_FALSE(data2.empty());
ChromeUserMetricsExtension uma_proto2;
EXPECT_TRUE(uma_proto2.ParseFromArray(
reinterpret_cast<const char*>(&data2[0]), data2.size()));
EXPECT_FALSE(data2.empty());
const HistogramEventProto& histogram_proto2 =
uma_proto2.histogram_event(uma_proto2.histogram_event_size() - 1);
ASSERT_EQ(1, histogram_proto2.bucket_size());
EXPECT_LE(0, histogram_proto2.bucket(0).min());
EXPECT_LE(3, histogram_proto2.bucket(0).max());
EXPECT_EQ(1, histogram_proto2.bucket(0).count());
}
} // namespace cronet
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