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/memory/scoped_ptr.h"
   6 #include "base/metrics/sample_map.h"
   7 #include "testing/gtest/include/gtest/gtest.h"
   8
   9 namespace base {
  10 namespace {
  11
  12 TEST(SampleMapTest, AccumulateTest) {
  13   SampleMap samples;
  14
  15   samples.Accumulate(1, 100);
  16   samples.Accumulate(2, 200);
  17   samples.Accumulate(1, -200);
  18   EXPECT_EQ(-100, samples.GetCount(1));
  19   EXPECT_EQ(200, samples.GetCount(2));
  20
  21   EXPECT_EQ(300, samples.sum());
  22   EXPECT_EQ(100, samples.TotalCount());
  23   EXPECT_EQ(samples.redundant_count(), samples.TotalCount());
  24 }
  25
  26 TEST(SampleMapTest, AddSubtractTest) {
  27   SampleMap samples1;
  28   SampleMap samples2;
  29
  30   samples1.Accumulate(1, 100);
  31   samples1.Accumulate(2, 100);
  32   samples1.Accumulate(3, 100);
  33
  34   samples2.Accumulate(1, 200);
  35   samples2.Accumulate(2, 200);
  36   samples2.Accumulate(4, 200);
  37
  38   samples1.Add(samples2);
  39   EXPECT_EQ(300, samples1.GetCount(1));
  40   EXPECT_EQ(300, samples1.GetCount(2));
  41   EXPECT_EQ(100, samples1.GetCount(3));
  42   EXPECT_EQ(200, samples1.GetCount(4));
  43   EXPECT_EQ(2000, samples1.sum());
  44   EXPECT_EQ(900, samples1.TotalCount());
  45   EXPECT_EQ(samples1.redundant_count(), samples1.TotalCount());
  46
  47   samples1.Subtract(samples2);
  48   EXPECT_EQ(100, samples1.GetCount(1));
  49   EXPECT_EQ(100, samples1.GetCount(2));
  50   EXPECT_EQ(100, samples1.GetCount(3));
  51   EXPECT_EQ(0, samples1.GetCount(4));
  52   EXPECT_EQ(600, samples1.sum());
  53   EXPECT_EQ(300, samples1.TotalCount());
  54   EXPECT_EQ(samples1.redundant_count(), samples1.TotalCount());
  55 }
  56
  57 TEST(SampleMapIteratorTest, IterateTest) {
  58   SampleMap samples;
  59   samples.Accumulate(1, 100);
  60   samples.Accumulate(2, 200);
  61   samples.Accumulate(4, -300);
  62   samples.Accumulate(5, 0);
  63
  64   scoped_ptr<SampleCountIterator> it = samples.Iterator();
  65
  66   HistogramBase::Sample min;
  67   HistogramBase::Sample max;
  68   HistogramBase::Count count;
  69
  70   it->Get(&min, &max, &count);
  71   EXPECT_EQ(1, min);
  72   EXPECT_EQ(2, max);
  73   EXPECT_EQ(100, count);
  74   EXPECT_FALSE(it->GetBucketIndex(NULL));
  75
  76   it->Next();
  77   it->Get(&min, &max, &count);
  78   EXPECT_EQ(2, min);
  79   EXPECT_EQ(3, max);
  80   EXPECT_EQ(200, count);
  81
  82   it->Next();
  83   it->Get(&min, &max, &count);
  84   EXPECT_EQ(4, min);
  85   EXPECT_EQ(5, max);
  86   EXPECT_EQ(-300, count);
  87
  88   it->Next();
  89   it->Get(&min, &max, &count);
  90   EXPECT_EQ(5, min);
  91   EXPECT_EQ(6, max);
  92   EXPECT_EQ(0, count);
  93
  94   it->Next();
  95   EXPECT_TRUE(it->Done());
  96 }
  97
  98 #if (!defined(NDEBUG) || defined(DCHECK_ALWAYS_ON)) && GTEST_HAS_DEATH_TEST
  99
 100 TEST(SampleMapIteratorDeathTest, IterateDoneTest) {
 101   SampleMap samples;
 102
 103   scoped_ptr<SampleCountIterator> it = samples.Iterator();
 104
 105   EXPECT_TRUE(it->Done());
 106
 107   HistogramBase::Sample min;
 108   HistogramBase::Sample max;
 109   HistogramBase::Count count;
 110   EXPECT_DEATH(it->Get(&min, &max, &count), "");
 111
 112   EXPECT_DEATH(it->Next(), "");
 113
 114   samples.Accumulate(1, 100);
 115   it = samples.Iterator();
 116   EXPECT_FALSE(it->Done());
 117 }
 118
 119 #endif
 120 // (!defined(NDEBUG) || defined(DCHECK_ALWAYS_ON)) && GTEST_HAS_DEATH_TEST
 121
 122 }  // namespace
 123 }  // namespace base