src/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 class TestRapporService : public RapporService {
  18  public:
  19   TestRapporService(ReportingLevel reporting_level) : RapporService(&prefs) {
  20     RegisterPrefs(prefs.registry());
  21     Initialize(0,
  22                HmacByteVectorGenerator::GenerateEntropyInput(),
  23                reporting_level);
  24   }
  25
  26   void GetReports(RapporReports* reports) {
  27     ExportMetrics(reports);
  28   }
  29
  30   int32_t TestLoadCohort() {
  31     return LoadCohort();
  32   }
  33
  34   std::string TestLoadSecret() {
  35     return LoadSecret();
  36   }
  37
  38   void TestRecordSample(const std::string& metric_name,
  39                         const RapporParameters& parameters,
  40                         const std::string& sample) {
  41     RecordSampleInternal(metric_name, parameters, sample);
  42   }
  43
  44   TestingPrefServiceSimple prefs;
  45
  46  private:
  47   DISALLOW_COPY_AND_ASSIGN(TestRapporService);
  48 };
  49
  50 TEST(RapporServiceTest, LoadCohort) {
  51   TestRapporService rappor_service(REPORTING_DISABLED);
  52   rappor_service.prefs.SetInteger(prefs::kRapporCohortSeed, 1);
  53   EXPECT_EQ(1, rappor_service.TestLoadCohort());
  54 }
  55
  56 TEST(RapporServiceTest, LoadSecret) {
  57   TestRapporService rappor_service(REPORTING_DISABLED);
  58   std::string secret = HmacByteVectorGenerator::GenerateEntropyInput();
  59   std::string secret_base64;
  60   base::Base64Encode(secret, &secret_base64);
  61   rappor_service.prefs.SetString(prefs::kRapporSecret, secret_base64);
  62   EXPECT_EQ(secret, rappor_service.TestLoadSecret());
  63 }
  64
  65 // Check that samples can be recorded and exported.
  66 TEST(RapporServiceTest, RecordAndExportMetrics) {
  67   const RapporParameters kTestRapporParameters = {
  68       1 /* Num cohorts */,
  69       16 /* Bloom filter size bytes */,
  70       4 /* Bloom filter hash count */,
  71       PROBABILITY_75 /* Fake data probability */,
  72       PROBABILITY_50 /* Fake one probability */,
  73       PROBABILITY_75 /* One coin probability */,
  74       PROBABILITY_50 /* Zero coin probability */,
  75       COARSE_LEVEL};
  76
  77   TestRapporService rappor_service(COARSE_LEVEL);
  78
  79   // Multiple samples for the same metric should only generate one report.
  80   rappor_service.TestRecordSample("MyMetric", kTestRapporParameters, "foo");
  81   rappor_service.TestRecordSample("MyMetric", kTestRapporParameters, "bar");
  82
  83   RapporReports reports;
  84   rappor_service.GetReports(&reports);
  85   EXPECT_EQ(1, reports.report_size());
  86
  87   const RapporReports::Report& report = reports.report(0);
  88   EXPECT_TRUE(report.name_hash());
  89   EXPECT_EQ(16u, report.bits().size());
  90 }
  91
  92 // Check that the reporting level is respected.
  93 TEST(RapporServiceTest, ReportingLevel) {
  94   const RapporParameters kFineRapporParameters = {
  95       1 /* Num cohorts */,
  96       16 /* Bloom filter size bytes */,
  97       4 /* Bloom filter hash count */,
  98       PROBABILITY_75 /* Fake data probability */,
  99       PROBABILITY_50 /* Fake one probability */,
 100       PROBABILITY_75 /* One coin probability */,
 101       PROBABILITY_50 /* Zero coin probability */,
 102       FINE_LEVEL};
 103
 104   TestRapporService rappor_service(COARSE_LEVEL);
 105
 106   rappor_service.TestRecordSample("FineMetric", kFineRapporParameters, "foo");
 107
 108   RapporReports reports;
 109   rappor_service.GetReports(&reports);
 110   EXPECT_EQ(0, reports.report_size());
 111 }
 112
 113 }  // namespace rappor