266 lines
7.4 KiB
C++
266 lines
7.4 KiB
C++
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include <vector>
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#include "base/memory/scoped_ptr.h"
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#include "base/metrics/bucket_ranges.h"
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#include "base/metrics/histogram.h"
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#include "base/metrics/sample_vector.h"
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#include "testing/gtest/include/gtest/gtest.h"
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using std::vector;
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namespace base {
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namespace {
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TEST(SampleVectorTest, AccumulateTest) {
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// Custom buckets: [1, 5) [5, 10)
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BucketRanges ranges(3);
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ranges.set_range(0, 1);
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ranges.set_range(1, 5);
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ranges.set_range(2, 10);
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SampleVector samples(&ranges);
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samples.Accumulate(1, 200);
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samples.Accumulate(2, -300);
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EXPECT_EQ(-100, samples.GetCountAtIndex(0));
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samples.Accumulate(5, 200);
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EXPECT_EQ(200, samples.GetCountAtIndex(1));
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EXPECT_EQ(600, samples.sum());
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EXPECT_EQ(100, samples.redundant_count());
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EXPECT_EQ(samples.TotalCount(), samples.redundant_count());
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samples.Accumulate(5, -100);
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EXPECT_EQ(100, samples.GetCountAtIndex(1));
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EXPECT_EQ(100, samples.sum());
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EXPECT_EQ(0, samples.redundant_count());
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EXPECT_EQ(samples.TotalCount(), samples.redundant_count());
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}
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TEST(SampleVectorTest, AddSubtractTest) {
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// Custom buckets: [0, 1) [1, 2) [2, 3) [3, INT_MAX)
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BucketRanges ranges(5);
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ranges.set_range(0, 0);
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ranges.set_range(1, 1);
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ranges.set_range(2, 2);
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ranges.set_range(3, 3);
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ranges.set_range(4, INT_MAX);
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SampleVector samples1(&ranges);
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samples1.Accumulate(0, 100);
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samples1.Accumulate(2, 100);
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samples1.Accumulate(4, 100);
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EXPECT_EQ(600, samples1.sum());
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EXPECT_EQ(300, samples1.TotalCount());
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EXPECT_EQ(samples1.redundant_count(), samples1.TotalCount());
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SampleVector samples2(&ranges);
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samples2.Accumulate(1, 200);
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samples2.Accumulate(2, 200);
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samples2.Accumulate(4, 200);
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EXPECT_EQ(1400, samples2.sum());
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EXPECT_EQ(600, samples2.TotalCount());
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EXPECT_EQ(samples2.redundant_count(), samples2.TotalCount());
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samples1.Add(samples2);
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EXPECT_EQ(100, samples1.GetCountAtIndex(0));
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EXPECT_EQ(200, samples1.GetCountAtIndex(1));
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EXPECT_EQ(300, samples1.GetCountAtIndex(2));
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EXPECT_EQ(300, samples1.GetCountAtIndex(3));
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EXPECT_EQ(2000, samples1.sum());
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EXPECT_EQ(900, samples1.TotalCount());
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EXPECT_EQ(samples1.redundant_count(), samples1.TotalCount());
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samples1.Subtract(samples2);
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EXPECT_EQ(100, samples1.GetCountAtIndex(0));
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EXPECT_EQ(0, samples1.GetCountAtIndex(1));
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EXPECT_EQ(100, samples1.GetCountAtIndex(2));
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EXPECT_EQ(100, samples1.GetCountAtIndex(3));
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EXPECT_EQ(600, samples1.sum());
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EXPECT_EQ(300, samples1.TotalCount());
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EXPECT_EQ(samples1.redundant_count(), samples1.TotalCount());
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}
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#if (!defined(NDEBUG) || defined(DCHECK_ALWAYS_ON)) && GTEST_HAS_DEATH_TEST
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TEST(SampleVectorDeathTest, BucketIndexTest) {
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// 8 buckets with exponential layout:
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// [0, 1) [1, 2) [2, 4) [4, 8) [8, 16) [16, 32) [32, 64) [64, INT_MAX)
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BucketRanges ranges(9);
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Histogram::InitializeBucketRanges(1, 64, &ranges);
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SampleVector samples(&ranges);
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// Normal case
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samples.Accumulate(0, 1);
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samples.Accumulate(3, 2);
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samples.Accumulate(64, 3);
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EXPECT_EQ(1, samples.GetCount(0));
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EXPECT_EQ(2, samples.GetCount(2));
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EXPECT_EQ(3, samples.GetCount(65));
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// Extreme case.
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EXPECT_DEATH(samples.Accumulate(INT_MIN, 100), "");
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EXPECT_DEATH(samples.Accumulate(-1, 100), "");
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EXPECT_DEATH(samples.Accumulate(INT_MAX, 100), "");
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// Custom buckets: [1, 5) [5, 10)
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// Note, this is not a valid BucketRanges for Histogram because it does not
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// have overflow buckets.
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BucketRanges ranges2(3);
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ranges2.set_range(0, 1);
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ranges2.set_range(1, 5);
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ranges2.set_range(2, 10);
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SampleVector samples2(&ranges2);
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// Normal case.
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samples2.Accumulate(1, 1);
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samples2.Accumulate(4, 1);
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samples2.Accumulate(5, 2);
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samples2.Accumulate(9, 2);
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EXPECT_EQ(2, samples2.GetCount(1));
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EXPECT_EQ(4, samples2.GetCount(5));
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// Extreme case.
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EXPECT_DEATH(samples2.Accumulate(0, 100), "");
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EXPECT_DEATH(samples2.Accumulate(10, 100), "");
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}
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TEST(SampleVectorDeathTest, AddSubtractBucketNotMatchTest) {
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// Custom buckets 1: [1, 3) [3, 5)
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BucketRanges ranges1(3);
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ranges1.set_range(0, 1);
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ranges1.set_range(1, 3);
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ranges1.set_range(2, 5);
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SampleVector samples1(&ranges1);
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// Custom buckets 2: [0, 1) [1, 3) [3, 6) [6, 7)
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BucketRanges ranges2(5);
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ranges2.set_range(0, 0);
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ranges2.set_range(1, 1);
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ranges2.set_range(2, 3);
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ranges2.set_range(3, 6);
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ranges2.set_range(4, 7);
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SampleVector samples2(&ranges2);
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samples2.Accumulate(1, 100);
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samples1.Add(samples2);
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EXPECT_EQ(100, samples1.GetCountAtIndex(0));
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// Extra bucket in the beginning.
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samples2.Accumulate(0, 100);
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EXPECT_DEATH(samples1.Add(samples2), "");
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EXPECT_DEATH(samples1.Subtract(samples2), "");
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// Extra bucket in the end.
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samples2.Accumulate(0, -100);
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samples2.Accumulate(6, 100);
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EXPECT_DEATH(samples1.Add(samples2), "");
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EXPECT_DEATH(samples1.Subtract(samples2), "");
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// Bucket not match: [3, 5) VS [3, 6)
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samples2.Accumulate(6, -100);
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samples2.Accumulate(3, 100);
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EXPECT_DEATH(samples1.Add(samples2), "");
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EXPECT_DEATH(samples1.Subtract(samples2), "");
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}
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#endif
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// (!defined(NDEBUG) || defined(DCHECK_ALWAYS_ON)) && GTEST_HAS_DEATH_TEST
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TEST(SampleVectorIteratorTest, IterateTest) {
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BucketRanges ranges(5);
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ranges.set_range(0, 0);
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ranges.set_range(1, 1);
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ranges.set_range(2, 2);
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ranges.set_range(3, 3);
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ranges.set_range(4, 4);
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vector<HistogramBase::Count> counts(3);
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counts[0] = 1;
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counts[1] = 0; // Iterator will bypass this empty bucket.
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counts[2] = 2;
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// BucketRanges can have larger size than counts.
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SampleVectorIterator it(&counts, &ranges);
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size_t index;
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HistogramBase::Sample min;
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HistogramBase::Sample max;
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HistogramBase::Count count;
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it.Get(&min, &max, &count);
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EXPECT_EQ(0, min);
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EXPECT_EQ(1, max);
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EXPECT_EQ(1, count);
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EXPECT_TRUE(it.GetBucketIndex(&index));
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EXPECT_EQ(0u, index);
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it.Next();
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it.Get(&min, &max, &count);
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EXPECT_EQ(2, min);
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EXPECT_EQ(3, max);
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EXPECT_EQ(2, count);
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EXPECT_TRUE(it.GetBucketIndex(&index));
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EXPECT_EQ(2u, index);
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it.Next();
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EXPECT_TRUE(it.Done());
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// Create iterator from SampleVector.
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SampleVector samples(&ranges);
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samples.Accumulate(0, 0);
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samples.Accumulate(1, 1);
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samples.Accumulate(2, 2);
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samples.Accumulate(3, 3);
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scoped_ptr<SampleCountIterator> it2 = samples.Iterator();
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int i;
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for (i = 1; !it2->Done(); i++, it2->Next()) {
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it2->Get(&min, &max, &count);
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EXPECT_EQ(i, min);
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EXPECT_EQ(i + 1, max);
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EXPECT_EQ(i, count);
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size_t index;
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EXPECT_TRUE(it2->GetBucketIndex(&index));
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EXPECT_EQ(static_cast<size_t>(i), index);
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}
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EXPECT_EQ(4, i);
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}
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#if (!defined(NDEBUG) || defined(DCHECK_ALWAYS_ON)) && GTEST_HAS_DEATH_TEST
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TEST(SampleVectorIteratorDeathTest, IterateDoneTest) {
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BucketRanges ranges(5);
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ranges.set_range(0, 0);
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ranges.set_range(1, 1);
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ranges.set_range(2, 2);
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ranges.set_range(3, 3);
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ranges.set_range(4, INT_MAX);
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SampleVector samples(&ranges);
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scoped_ptr<SampleCountIterator> it = samples.Iterator();
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EXPECT_TRUE(it->Done());
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HistogramBase::Sample min;
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HistogramBase::Sample max;
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HistogramBase::Count count;
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EXPECT_DEATH(it->Get(&min, &max, &count), "");
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EXPECT_DEATH(it->Next(), "");
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samples.Accumulate(2, 100);
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it = samples.Iterator();
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EXPECT_FALSE(it->Done());
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}
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#endif
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// (!defined(NDEBUG) || defined(DCHECK_ALWAYS_ON)) && GTEST_HAS_DEATH_TEST
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} // namespace
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} // namespace base
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