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 "components/rappor/byte_vector_utils.h"
   8 #include "components/rappor/proto/rappor_metric.pb.h"
   9 #include "components/rappor/rappor_parameters.h"
  10 #include "testing/gtest/include/gtest/gtest.h"
  11
  12 namespace rappor {
  13
  14 class TestRapporService : public RapporService {
  15  public:
  16   void GetReports(RapporReports* reports) {
  17     ExportMetrics(reports);
  18   }
  19   void TestRecordSample(const std::string& metric_name,
  20                         const RapporParameters& parameters,
  21                         const std::string& sample) {
  22     RecordSampleInternal(metric_name, parameters, sample);
  23   }
  24 };
  25
  26 TEST(RapporServiceTest, RecordAndExportMetrics) {
  27   const RapporParameters kTestRapporParameters = {
  28       1 /* Num cohorts */,
  29       16 /* Bloom filter size bytes */,
  30       4 /* Bloom filter hash count */,
  31       PROBABILITY_75 /* Fake data probability */,
  32       PROBABILITY_50 /* Fake one probability */,
  33       PROBABILITY_75 /* One coin probability */,
  34       PROBABILITY_50 /* Zero coin probability */};
  35
  36   TestRapporService rappor_service;
  37   rappor_service.SetCohortForTesting(0);
  38   rappor_service.SetSecretForTesting(
  39       HmacByteVectorGenerator::GenerateEntropyInput());
  40
  41   rappor_service.TestRecordSample("MyMetric", kTestRapporParameters, "foo");
  42   rappor_service.TestRecordSample("MyMetric", kTestRapporParameters, "bar");
  43
  44   RapporReports reports;
  45   rappor_service.GetReports(&reports);
  46   EXPECT_EQ(1, reports.report_size());
  47
  48   const RapporReports::Report& report = reports.report(0);
  49   EXPECT_TRUE(report.name_hash());
  50   EXPECT_EQ(16u, report.bits().size());
  51 }
  52
  53 }  // namespace rappor