Move base to DEPS

base/test/histogram_tester.cc

-// 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 "base/test/histogram_tester.h"
-
-#include "base/metrics/histogram.h"
-#include "base/metrics/histogram_samples.h"
-#include "base/metrics/statistics_recorder.h"
-#include "base/stl_util.h"
-#include "testing/gtest/include/gtest/gtest.h"
-
-namespace base {
-
-HistogramTester::HistogramTester() {
-  StatisticsRecorder::Initialize();  // Safe to call multiple times.
-
-  // Record any histogram data that exists when the object is created so it can
-  // be subtracted later.
-  StatisticsRecorder::Histograms histograms;
-  StatisticsRecorder::GetSnapshot(std::string(), &histograms);
-  for (size_t i = 0; i < histograms.size(); ++i) {
-    histograms_snapshot_[histograms[i]->histogram_name()] =
-        histograms[i]->SnapshotSamples().release();
-  }
-}
-
-HistogramTester::~HistogramTester() {
-  STLDeleteValues(&histograms_snapshot_);
-}
-
-void HistogramTester::ExpectUniqueSample(
-    const std::string& name,
-    base::HistogramBase::Sample sample,
-    base::HistogramBase::Count expected_count) const {
-  base::HistogramBase* histogram =
-      base::StatisticsRecorder::FindHistogram(name);
-  EXPECT_NE(static_cast<base::HistogramBase*>(NULL), histogram)
-      << "Histogram \"" << name << "\" does not exist.";
-
-  if (histogram) {
-    scoped_ptr<base::HistogramSamples> samples(histogram->SnapshotSamples());
-    CheckBucketCount(name, sample, expected_count, *samples);
-    CheckTotalCount(name, expected_count, *samples);
-  }
-}
-
-void HistogramTester::ExpectBucketCount(
-    const std::string& name,
-    base::HistogramBase::Sample sample,
-    base::HistogramBase::Count expected_count) const {
-  base::HistogramBase* histogram =
-      base::StatisticsRecorder::FindHistogram(name);
-  EXPECT_NE(static_cast<base::HistogramBase*>(NULL), histogram)
-      << "Histogram \"" << name << "\" does not exist.";
-
-  if (histogram) {
-    scoped_ptr<base::HistogramSamples> samples(histogram->SnapshotSamples());
-    CheckBucketCount(name, sample, expected_count, *samples);
-  }
-}
-
-void HistogramTester::ExpectTotalCount(const std::string& name,
-                                       base::HistogramBase::Count count) const {
-  base::HistogramBase* histogram =
-      base::StatisticsRecorder::FindHistogram(name);
-  if (histogram) {
-    scoped_ptr<base::HistogramSamples> samples(histogram->SnapshotSamples());
-    CheckTotalCount(name, count, *samples);
-  } else {
-    // No histogram means there were zero samples.
-    EXPECT_EQ(count, 0) << "Histogram \"" << name << "\" does not exist.";
-  }
-}
-
-std::vector<Bucket> HistogramTester::GetAllSamples(const std::string& name) {
-  std::vector<Bucket> samples;
-  scoped_ptr<HistogramSamples> snapshot =
-      GetHistogramSamplesSinceCreation(name);
-  for (auto it = snapshot->Iterator(); !it->Done(); it->Next()) {
-    HistogramBase::Sample sample;
-    HistogramBase::Count count;
-    it->Get(&sample, nullptr, &count);
-    samples.push_back(Bucket(sample, count));
-  }
-  return samples;
-}
-
-scoped_ptr<HistogramSamples> HistogramTester::GetHistogramSamplesSinceCreation(
-    const std::string& histogram_name) {
-  HistogramBase* histogram = StatisticsRecorder::FindHistogram(histogram_name);
-  if (!histogram)
-    return scoped_ptr<HistogramSamples>();
-  scoped_ptr<HistogramSamples> named_samples(histogram->SnapshotSamples());
-  HistogramSamples* named_original_samples =
-      histograms_snapshot_[histogram_name];
-  if (named_original_samples)
-    named_samples->Subtract(*named_original_samples);
-  return named_samples.Pass();
-}
-
-void HistogramTester::CheckBucketCount(
-    const std::string& name,
-    base::HistogramBase::Sample sample,
-    base::HistogramBase::Count expected_count,
-    const base::HistogramSamples& samples) const {
-  int actual_count = samples.GetCount(sample);
-  std::map<std::string, HistogramSamples*>::const_iterator histogram_data;
-  histogram_data = histograms_snapshot_.find(name);
-  if (histogram_data != histograms_snapshot_.end())
-    actual_count -= histogram_data->second->GetCount(sample);
-
-  EXPECT_EQ(expected_count, actual_count)
-      << "Histogram \"" << name
-      << "\" does not have the right number of samples (" << expected_count
-      << ") in the expected bucket (" << sample << "). It has (" << actual_count
-      << ").";
-}
-
-void HistogramTester::CheckTotalCount(
-    const std::string& name,
-    base::HistogramBase::Count expected_count,
-    const base::HistogramSamples& samples) const {
-  int actual_count = samples.TotalCount();
-  std::map<std::string, HistogramSamples*>::const_iterator histogram_data;
-  histogram_data = histograms_snapshot_.find(name);
-  if (histogram_data != histograms_snapshot_.end())
-    actual_count -= histogram_data->second->TotalCount();
-
-  EXPECT_EQ(expected_count, actual_count)
-      << "Histogram \"" << name
-      << "\" does not have the right total number of samples ("
-      << expected_count << "). It has (" << actual_count << ").";
-}
-
-bool Bucket::operator==(const Bucket& other) const {
-  return min == other.min && count == other.count;
-}
-
-void PrintTo(const Bucket& bucket, std::ostream* os) {
-  *os << "Bucket " << bucket.min << ": " << bucket.count;
-}
-
-}  // namespace base