base/metrics/sample_map_unittest.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "base/metrics/sample_map.h"
   6
   7 #include "base/memory/scoped_ptr.h"
   8 #include "testing/gtest/include/gtest/gtest.h"
   9
  10 namespace base {
  11 namespace {
  12
  13 TEST(SampleMapTest, AccumulateTest) {
  14   SampleMap samples;
  15
  16   samples.Accumulate(1, 100);
  17   samples.Accumulate(2, 200);
  18   samples.Accumulate(1, -200);
  19   EXPECT_EQ(-100, samples.GetCount(1));
  20   EXPECT_EQ(200, samples.GetCount(2));
  21
  22   EXPECT_EQ(300, samples.sum());
  23   EXPECT_EQ(100, samples.TotalCount());
  24   EXPECT_EQ(samples.redundant_count(), samples.TotalCount());
  25 }
  26
  27 TEST(SampleMapTest, AddSubtractTest) {
  28   SampleMap samples1;
  29   SampleMap samples2;
  30
  31   samples1.Accumulate(1, 100);
  32   samples1.Accumulate(2, 100);
  33   samples1.Accumulate(3, 100);
  34
  35   samples2.Accumulate(1, 200);
  36   samples2.Accumulate(2, 200);
  37   samples2.Accumulate(4, 200);
  38
  39   samples1.Add(samples2);
  40   EXPECT_EQ(300, samples1.GetCount(1));
  41   EXPECT_EQ(300, samples1.GetCount(2));
  42   EXPECT_EQ(100, samples1.GetCount(3));
  43   EXPECT_EQ(200, samples1.GetCount(4));
  44   EXPECT_EQ(2000, samples1.sum());
  45   EXPECT_EQ(900, samples1.TotalCount());
  46   EXPECT_EQ(samples1.redundant_count(), samples1.TotalCount());
  47
  48   samples1.Subtract(samples2);
  49   EXPECT_EQ(100, samples1.GetCount(1));
  50   EXPECT_EQ(100, samples1.GetCount(2));
  51   EXPECT_EQ(100, samples1.GetCount(3));
  52   EXPECT_EQ(0, samples1.GetCount(4));
  53   EXPECT_EQ(600, samples1.sum());
  54   EXPECT_EQ(300, samples1.TotalCount());
  55   EXPECT_EQ(samples1.redundant_count(), samples1.TotalCount());
  56 }
  57
  58 TEST(SampleMapIteratorTest, IterateTest) {
  59   SampleMap samples;
  60   samples.Accumulate(1, 100);
  61   samples.Accumulate(2, 200);
  62   samples.Accumulate(4, -300);
  63   samples.Accumulate(5, 0);
  64
  65   scoped_ptr<SampleCountIterator> it = samples.Iterator();
  66
  67   HistogramBase::Sample min;
  68   HistogramBase::Sample max;
  69   HistogramBase::Count count;
  70
  71   it->Get(&min, &max, &count);
  72   EXPECT_EQ(1, min);
  73   EXPECT_EQ(2, max);
  74   EXPECT_EQ(100, count);
  75   EXPECT_FALSE(it->GetBucketIndex(NULL));
  76
  77   it->Next();
  78   it->Get(&min, &max, &count);
  79   EXPECT_EQ(2, min);
  80   EXPECT_EQ(3, max);
  81   EXPECT_EQ(200, count);
  82
  83   it->Next();
  84   it->Get(&min, &max, &count);
  85   EXPECT_EQ(4, min);
  86   EXPECT_EQ(5, max);
  87   EXPECT_EQ(-300, count);
  88
  89   it->Next();
  90   EXPECT_TRUE(it->Done());
  91 }
  92
  93 TEST(SampleMapIteratorTest, SkipEmptyRanges) {
  94   SampleMap samples;
  95   samples.Accumulate(5, 1);
  96   samples.Accumulate(10, 2);
  97   samples.Accumulate(15, 3);
  98   samples.Accumulate(20, 4);
  99   samples.Accumulate(25, 5);
 100
 101   SampleMap samples2;
 102   samples2.Accumulate(5, 1);
 103   samples2.Accumulate(20, 4);
 104   samples2.Accumulate(25, 5);
 105
 106   samples.Subtract(samples2);
 107
 108   scoped_ptr<SampleCountIterator> it = samples.Iterator();
 109   EXPECT_FALSE(it->Done());
 110
 111   HistogramBase::Sample min;
 112   HistogramBase::Sample max;
 113   HistogramBase::Count count;
 114
 115   it->Get(&min, &max, &count);
 116   EXPECT_EQ(10, min);
 117   EXPECT_EQ(11, max);
 118   EXPECT_EQ(2, count);
 119
 120   it->Next();
 121   EXPECT_FALSE(it->Done());
 122
 123   it->Get(&min, &max, &count);
 124   EXPECT_EQ(15, min);
 125   EXPECT_EQ(16, max);
 126   EXPECT_EQ(3, count);
 127
 128   it->Next();
 129   EXPECT_TRUE(it->Done());
 130 }
 131
 132 #if (!defined(NDEBUG) || defined(DCHECK_ALWAYS_ON)) && GTEST_HAS_DEATH_TEST
 133
 134 TEST(SampleMapIteratorDeathTest, IterateDoneTest) {
 135   SampleMap samples;
 136
 137   scoped_ptr<SampleCountIterator> it = samples.Iterator();
 138
 139   EXPECT_TRUE(it->Done());
 140
 141   HistogramBase::Sample min;
 142   HistogramBase::Sample max;
 143   HistogramBase::Count count;
 144   EXPECT_DEATH(it->Get(&min, &max, &count), "");
 145
 146   EXPECT_DEATH(it->Next(), "");
 147
 148   samples.Accumulate(1, 100);
 149   it = samples.Iterator();
 150   EXPECT_FALSE(it->Done());
 151 }
 152
 153 #endif
 154 // (!defined(NDEBUG) || defined(DCHECK_ALWAYS_ON)) && GTEST_HAS_DEATH_TEST
 155
 156 }  // namespace
 157 }  // namespace base