src/components/metrics/serialization/serialization_utils_unittest.cc

   1 // Copyright 2014 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 "components/metrics/serialization/serialization_utils.h"
   6
   7 #include "base/files/file_util.h"
   8 #include "base/files/scoped_temp_dir.h"
   9 #include "base/logging.h"
  10 #include "base/strings/stringprintf.h"
  11 #include "components/metrics/serialization/metric_sample.h"
  12 #include "testing/gtest/include/gtest/gtest.h"
  13
  14 namespace metrics {
  15 namespace {
  16
  17 class SerializationUtilsTest : public testing::Test {
  18  protected:
  19   SerializationUtilsTest() {
  20     bool success = temporary_dir.CreateUniqueTempDir();
  21     if (success) {
  22       base::FilePath dir_path = temporary_dir.path();
  23       filename = dir_path.value() + "chromeossampletest";
  24       filepath = base::FilePath(filename);
  25     }
  26   }
  27
  28   void SetUp() override { base::DeleteFile(filepath, false); }
  29
  30   void TestSerialization(MetricSample* sample) {
  31     std::string serialized(sample->ToString());
  32     ASSERT_EQ('\0', serialized[serialized.length() - 1]);
  33     scoped_ptr<MetricSample> deserialized =
  34         SerializationUtils::ParseSample(serialized);
  35     ASSERT_TRUE(deserialized);
  36     EXPECT_TRUE(sample->IsEqual(*deserialized.get()));
  37   }
  38
  39   std::string filename;
  40   base::ScopedTempDir temporary_dir;
  41   base::FilePath filepath;
  42 };
  43
  44 TEST_F(SerializationUtilsTest, CrashSerializeTest) {
  45   TestSerialization(MetricSample::CrashSample("test").get());
  46 }
  47
  48 TEST_F(SerializationUtilsTest, HistogramSerializeTest) {
  49   TestSerialization(
  50       MetricSample::HistogramSample("myhist", 13, 1, 100, 10).get());
  51 }
  52
  53 TEST_F(SerializationUtilsTest, LinearSerializeTest) {
  54   TestSerialization(
  55       MetricSample::LinearHistogramSample("linearhist", 12, 30).get());
  56 }
  57
  58 TEST_F(SerializationUtilsTest, SparseSerializeTest) {
  59   TestSerialization(MetricSample::SparseHistogramSample("mysparse", 30).get());
  60 }
  61
  62 TEST_F(SerializationUtilsTest, UserActionSerializeTest) {
  63   TestSerialization(MetricSample::UserActionSample("myaction").get());
  64 }
  65
  66 TEST_F(SerializationUtilsTest, IllegalNameAreFilteredTest) {
  67   scoped_ptr<MetricSample> sample1 =
  68       MetricSample::SparseHistogramSample("no space", 10);
  69   scoped_ptr<MetricSample> sample2 = MetricSample::LinearHistogramSample(
  70       base::StringPrintf("here%cbhe", '\0'), 1, 3);
  71
  72   EXPECT_FALSE(SerializationUtils::WriteMetricToFile(*sample1.get(), filename));
  73   EXPECT_FALSE(SerializationUtils::WriteMetricToFile(*sample2.get(), filename));
  74   int64 size = 0;
  75
  76   ASSERT_TRUE(!PathExists(filepath) || base::GetFileSize(filepath, &size));
  77
  78   EXPECT_EQ(0, size);
  79 }
  80
  81 TEST_F(SerializationUtilsTest, BadInputIsCaughtTest) {
  82   std::string input(
  83       base::StringPrintf("sparsehistogram%cname foo%c", '\0', '\0'));
  84   EXPECT_EQ(NULL, MetricSample::ParseSparseHistogram(input).get());
  85 }
  86
  87 TEST_F(SerializationUtilsTest, MessageSeparatedByZero) {
  88   scoped_ptr<MetricSample> crash = MetricSample::CrashSample("mycrash");
  89
  90   SerializationUtils::WriteMetricToFile(*crash.get(), filename);
  91   int64 size = 0;
  92   ASSERT_TRUE(base::GetFileSize(filepath, &size));
  93   // 4 bytes for the size
  94   // 5 bytes for crash
  95   // 7 bytes for mycrash
  96   // 2 bytes for the \0
  97   // -> total of 18
  98   EXPECT_EQ(size, 18);
  99 }
 100
 101 TEST_F(SerializationUtilsTest, MessagesTooLongAreDiscardedTest) {
 102   // Creates a message that is bigger than the maximum allowed size.
 103   // As we are adding extra character (crash, \0s, etc), if the name is
 104   // kMessageMaxLength long, it will be too long.
 105   std::string name(SerializationUtils::kMessageMaxLength, 'c');
 106
 107   scoped_ptr<MetricSample> crash = MetricSample::CrashSample(name);
 108   EXPECT_FALSE(SerializationUtils::WriteMetricToFile(*crash.get(), filename));
 109   int64 size = 0;
 110   ASSERT_TRUE(base::GetFileSize(filepath, &size));
 111   EXPECT_EQ(0, size);
 112 }
 113
 114 TEST_F(SerializationUtilsTest, ReadLongMessageTest) {
 115   base::File test_file(filepath,
 116                        base::File::FLAG_OPEN_ALWAYS | base::File::FLAG_APPEND);
 117   std::string message(SerializationUtils::kMessageMaxLength + 1, 'c');
 118
 119   int32 message_size = message.length() + sizeof(int32);
 120   test_file.WriteAtCurrentPos(reinterpret_cast<const char*>(&message_size),
 121                               sizeof(message_size));
 122   test_file.WriteAtCurrentPos(message.c_str(), message.length());
 123   test_file.Close();
 124
 125   scoped_ptr<MetricSample> crash = MetricSample::CrashSample("test");
 126   SerializationUtils::WriteMetricToFile(*crash.get(), filename);
 127
 128   ScopedVector<MetricSample> samples;
 129   SerializationUtils::ReadAndTruncateMetricsFromFile(filename, &samples);
 130   ASSERT_EQ(size_t(1), samples.size());
 131   ASSERT_TRUE(samples[0] != NULL);
 132   EXPECT_TRUE(crash->IsEqual(*samples[0]));
 133 }
 134
 135 TEST_F(SerializationUtilsTest, WriteReadTest) {
 136   scoped_ptr<MetricSample> hist =
 137       MetricSample::HistogramSample("myhist", 1, 2, 3, 4);
 138   scoped_ptr<MetricSample> crash = MetricSample::CrashSample("mycrash");
 139   scoped_ptr<MetricSample> lhist =
 140       MetricSample::LinearHistogramSample("linear", 1, 10);
 141   scoped_ptr<MetricSample> shist =
 142       MetricSample::SparseHistogramSample("mysparse", 30);
 143   scoped_ptr<MetricSample> action = MetricSample::UserActionSample("myaction");
 144
 145   SerializationUtils::WriteMetricToFile(*hist.get(), filename);
 146   SerializationUtils::WriteMetricToFile(*crash.get(), filename);
 147   SerializationUtils::WriteMetricToFile(*lhist.get(), filename);
 148   SerializationUtils::WriteMetricToFile(*shist.get(), filename);
 149   SerializationUtils::WriteMetricToFile(*action.get(), filename);
 150   ScopedVector<MetricSample> vect;
 151   SerializationUtils::ReadAndTruncateMetricsFromFile(filename, &vect);
 152   ASSERT_EQ(vect.size(), size_t(5));
 153   for (int i = 0; i < 5; i++) {
 154     ASSERT_TRUE(vect[0] != NULL);
 155   }
 156   EXPECT_TRUE(hist->IsEqual(*vect[0]));
 157   EXPECT_TRUE(crash->IsEqual(*vect[1]));
 158   EXPECT_TRUE(lhist->IsEqual(*vect[2]));
 159   EXPECT_TRUE(shist->IsEqual(*vect[3]));
 160   EXPECT_TRUE(action->IsEqual(*vect[4]));
 161
 162   int64 size = 0;
 163   ASSERT_TRUE(base::GetFileSize(filepath, &size));
 164   ASSERT_EQ(0, size);
 165 }
 166
 167 }  // namespace
 168 }  // namespace metrics