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() : RapporService(&prefs_) {
  20     RegisterPrefs(prefs_.registry());
  21     prefs_.SetInteger(prefs::kRapporCohortSeed, 0);
  22     std::string secret = HmacByteVectorGenerator::GenerateEntropyInput();
  23     std::string secret_base64;
  24     base::Base64Encode(secret, &secret_base64);
  25     prefs_.SetString(prefs::kRapporSecret, secret_base64);
  26     LoadCohort();
  27     LoadSecret();
  28   }
  29
  30   void GetReports(RapporReports* reports) {
  31     ExportMetrics(reports);
  32   }
  33
  34   void TestRecordSample(const std::string& metric_name,
  35                         const RapporParameters& parameters,
  36                         const std::string& sample) {
  37     RecordSampleInternal(metric_name, parameters, sample);
  38   }
  39
  40  protected:
  41   TestingPrefServiceSimple prefs_;
  42
  43  private:
  44   DISALLOW_COPY_AND_ASSIGN(TestRapporService);
  45 };
  46
  47 TEST(RapporServiceTest, RecordAndExportMetrics) {
  48   const RapporParameters kTestRapporParameters = {
  49       1 /* Num cohorts */,
  50       16 /* Bloom filter size bytes */,
  51       4 /* Bloom filter hash count */,
  52       PROBABILITY_75 /* Fake data probability */,
  53       PROBABILITY_50 /* Fake one probability */,
  54       PROBABILITY_75 /* One coin probability */,
  55       PROBABILITY_50 /* Zero coin probability */};
  56
  57   TestRapporService rappor_service;
  58
  59   rappor_service.TestRecordSample("MyMetric", kTestRapporParameters, "foo");
  60   rappor_service.TestRecordSample("MyMetric", kTestRapporParameters, "bar");
  61
  62   RapporReports reports;
  63   rappor_service.GetReports(&reports);
  64   EXPECT_EQ(1, reports.report_size());
  65
  66   const RapporReports::Report& report = reports.report(0);
  67   EXPECT_TRUE(report.name_hash());
  68   EXPECT_EQ(16u, report.bits().size());
  69 }
  70
  71 }  // namespace rappor