components/rappor/rappor_service_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/rappor/rappor_service.h"
   6
   7 #include "base/base64.h"
   8 #include "base/prefs/testing_pref_service.h"
   9 #include "components/rappor/byte_vector_utils.h"
  10 #include "components/rappor/proto/rappor_metric.pb.h"
  11 #include "components/rappor/rappor_parameters.h"
  12 #include "components/rappor/rappor_pref_names.h"
  13 #include "testing/gtest/include/gtest/gtest.h"
  14
  15 namespace rappor {
  16
  17 namespace {
  18
  19 bool MockIsIncognito(bool is_incognito) {
  20   return is_incognito;
  21 }
  22
  23 }  // namespace
  24
  25 class TestRapporService : public RapporService {
  26  public:
  27   TestRapporService(ReportingLevel reporting_level, bool is_incognito)
  28       : RapporService(&prefs, base::Bind(&MockIsIncognito, is_incognito)) {
  29     RegisterPrefs(prefs.registry());
  30     Initialize(0,
  31                HmacByteVectorGenerator::GenerateEntropyInput(),
  32                reporting_level);
  33   }
  34
  35   void GetReports(RapporReports* reports) {
  36     ExportMetrics(reports);
  37   }
  38
  39   int32_t TestLoadCohort() {
  40     return LoadCohort();
  41   }
  42
  43   std::string TestLoadSecret() {
  44     return LoadSecret();
  45   }
  46
  47   void TestRecordSample(const std::string& metric_name,
  48                         const RapporParameters& parameters,
  49                         const std::string& sample) {
  50     RecordSampleInternal(metric_name, parameters, sample);
  51   }
  52
  53   TestingPrefServiceSimple prefs;
  54
  55  private:
  56   DISALLOW_COPY_AND_ASSIGN(TestRapporService);
  57 };
  58
  59 TEST(RapporServiceTest, LoadCohort) {
  60   TestRapporService rappor_service(REPORTING_DISABLED, false);
  61   rappor_service.prefs.SetInteger(prefs::kRapporCohortSeed, 1);
  62   EXPECT_EQ(1, rappor_service.TestLoadCohort());
  63 }
  64
  65 TEST(RapporServiceTest, LoadSecret) {
  66   TestRapporService rappor_service(REPORTING_DISABLED, false);
  67   std::string secret = HmacByteVectorGenerator::GenerateEntropyInput();
  68   std::string secret_base64;
  69   base::Base64Encode(secret, &secret_base64);
  70   rappor_service.prefs.SetString(prefs::kRapporSecret, secret_base64);
  71   EXPECT_EQ(secret, rappor_service.TestLoadSecret());
  72 }
  73
  74 // Check that samples can be recorded and exported.
  75 TEST(RapporServiceTest, RecordAndExportMetrics) {
  76   const RapporParameters kTestRapporParameters = {
  77       1 /* Num cohorts */,
  78       16 /* Bloom filter size bytes */,
  79       4 /* Bloom filter hash count */,
  80       PROBABILITY_75 /* Fake data probability */,
  81       PROBABILITY_50 /* Fake one probability */,
  82       PROBABILITY_75 /* One coin probability */,
  83       PROBABILITY_50 /* Zero coin probability */,
  84       COARSE_LEVEL};
  85
  86   TestRapporService rappor_service(COARSE_LEVEL, false);
  87
  88   // Multiple samples for the same metric should only generate one report.
  89   rappor_service.TestRecordSample("MyMetric", kTestRapporParameters, "foo");
  90   rappor_service.TestRecordSample("MyMetric", kTestRapporParameters, "bar");
  91
  92   RapporReports reports;
  93   rappor_service.GetReports(&reports);
  94   EXPECT_EQ(1, reports.report_size());
  95
  96   const RapporReports::Report& report = reports.report(0);
  97   EXPECT_TRUE(report.name_hash());
  98   EXPECT_EQ(16u, report.bits().size());
  99 }
 100
 101 // Check that the reporting level is respected.
 102 TEST(RapporServiceTest, ReportingLevel) {
 103   const RapporParameters kFineRapporParameters = {
 104       1 /* Num cohorts */,
 105       16 /* Bloom filter size bytes */,
 106       4 /* Bloom filter hash count */,
 107       PROBABILITY_75 /* Fake data probability */,
 108       PROBABILITY_50 /* Fake one probability */,
 109       PROBABILITY_75 /* One coin probability */,
 110       PROBABILITY_50 /* Zero coin probability */,
 111       FINE_LEVEL};
 112
 113   TestRapporService rappor_service(COARSE_LEVEL, false);
 114
 115   rappor_service.TestRecordSample("FineMetric", kFineRapporParameters, "foo");
 116
 117   RapporReports reports;
 118   rappor_service.GetReports(&reports);
 119   EXPECT_EQ(0, reports.report_size());
 120 }
 121
 122 // Check that the incognito is respected.
 123 TEST(RapporServiceTest, Incognito) {
 124   const RapporParameters kFineRapporParameters = {
 125       1 /* Num cohorts */,
 126       16 /* Bloom filter size bytes */,
 127       4 /* Bloom filter hash count */,
 128       PROBABILITY_75 /* Fake data probability */,
 129       PROBABILITY_50 /* Fake one probability */,
 130       PROBABILITY_75 /* One coin probability */,
 131       PROBABILITY_50 /* Zero coin probability */,
 132       COARSE_LEVEL};
 133
 134   TestRapporService rappor_service(COARSE_LEVEL, true);
 135
 136   rappor_service.TestRecordSample("MyMetric", kFineRapporParameters, "foo");
 137
 138   RapporReports reports;
 139   rappor_service.GetReports(&reports);
 140   EXPECT_EQ(0, reports.report_size());
 141 }
 142
 143 }  // namespace rappor