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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 "base/metrics/sample_map.h"
#include <memory>
#include "base/test/gtest_util.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace base {
namespace {
TEST(SampleMapTest, AccumulateTest) {
SampleMap samples(1);
samples.Accumulate(1, 100);
samples.Accumulate(2, 200);
samples.Accumulate(1, -200);
EXPECT_EQ(-100, samples.GetCount(1));
EXPECT_EQ(200, samples.GetCount(2));
EXPECT_EQ(300, samples.sum());
EXPECT_EQ(100, samples.TotalCount());
EXPECT_EQ(samples.redundant_count(), samples.TotalCount());
}
TEST(SampleMapTest, Accumulate_LargeValuesDontOverflow) {
SampleMap samples(1);
samples.Accumulate(250000000, 100);
samples.Accumulate(500000000, 200);
samples.Accumulate(250000000, -200);
EXPECT_EQ(-100, samples.GetCount(250000000));
EXPECT_EQ(200, samples.GetCount(500000000));
EXPECT_EQ(75000000000LL, samples.sum());
EXPECT_EQ(100, samples.TotalCount());
EXPECT_EQ(samples.redundant_count(), samples.TotalCount());
}
TEST(SampleMapTest, AddSubtractTest) {
SampleMap samples1(1);
SampleMap samples2(2);
samples1.Accumulate(1, 100);
samples1.Accumulate(2, 100);
samples1.Accumulate(3, 100);
samples2.Accumulate(1, 200);
samples2.Accumulate(2, 200);
samples2.Accumulate(4, 200);
samples1.Add(samples2);
EXPECT_EQ(300, samples1.GetCount(1));
EXPECT_EQ(300, samples1.GetCount(2));
EXPECT_EQ(100, samples1.GetCount(3));
EXPECT_EQ(200, samples1.GetCount(4));
EXPECT_EQ(2000, samples1.sum());
EXPECT_EQ(900, samples1.TotalCount());
EXPECT_EQ(samples1.redundant_count(), samples1.TotalCount());
samples1.Subtract(samples2);
EXPECT_EQ(100, samples1.GetCount(1));
EXPECT_EQ(100, samples1.GetCount(2));
EXPECT_EQ(100, samples1.GetCount(3));
EXPECT_EQ(0, samples1.GetCount(4));
EXPECT_EQ(600, samples1.sum());
EXPECT_EQ(300, samples1.TotalCount());
EXPECT_EQ(samples1.redundant_count(), samples1.TotalCount());
}
TEST(SampleMapIteratorTest, IterateTest) {
SampleMap samples(1);
samples.Accumulate(1, 100);
samples.Accumulate(2, 200);
samples.Accumulate(4, -300);
samples.Accumulate(5, 0);
std::unique_ptr<SampleCountIterator> it = samples.Iterator();
HistogramBase::Sample32 min;
int64_t max;
HistogramBase::Count32 count;
it->Get(&min, &max, &count);
EXPECT_EQ(1, min);
EXPECT_EQ(2, max);
EXPECT_EQ(100, count);
EXPECT_FALSE(it->GetBucketIndex(nullptr));
it->Next();
it->Get(&min, &max, &count);
EXPECT_EQ(2, min);
EXPECT_EQ(3, max);
EXPECT_EQ(200, count);
it->Next();
it->Get(&min, &max, &count);
EXPECT_EQ(4, min);
EXPECT_EQ(5, max);
EXPECT_EQ(-300, count);
it->Next();
EXPECT_TRUE(it->Done());
}
TEST(SampleMapIteratorTest, SkipEmptyRanges) {
SampleMap samples(1);
samples.Accumulate(5, 1);
samples.Accumulate(10, 2);
samples.Accumulate(15, 3);
samples.Accumulate(20, 4);
samples.Accumulate(25, 5);
SampleMap samples2(2);
samples2.Accumulate(5, 1);
samples2.Accumulate(20, 4);
samples2.Accumulate(25, 5);
samples.Subtract(samples2);
std::unique_ptr<SampleCountIterator> it = samples.Iterator();
EXPECT_FALSE(it->Done());
HistogramBase::Sample32 min;
int64_t max;
HistogramBase::Count32 count;
it->Get(&min, &max, &count);
EXPECT_EQ(10, min);
EXPECT_EQ(11, max);
EXPECT_EQ(2, count);
it->Next();
EXPECT_FALSE(it->Done());
it->Get(&min, &max, &count);
EXPECT_EQ(15, min);
EXPECT_EQ(16, max);
EXPECT_EQ(3, count);
it->Next();
EXPECT_TRUE(it->Done());
}
TEST(SampleMapIteratorDeathTest, IterateDoneTest) {
SampleMap samples(1);
std::unique_ptr<SampleCountIterator> it = samples.Iterator();
EXPECT_TRUE(it->Done());
HistogramBase::Sample32 min;
int64_t max;
HistogramBase::Count32 count;
EXPECT_DCHECK_DEATH(it->Get(&min, &max, &count));
EXPECT_DCHECK_DEATH(it->Next());
samples.Accumulate(1, 100);
it = samples.Iterator();
EXPECT_FALSE(it->Done());
}
} // namespace
} // namespace base
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