components/scheduling_metrics/total_duration_metric_reporter_unittest.cc

   1 // Copyright 2018 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/scheduling_metrics/total_duration_metric_reporter.h"
   6 #include "base/test/metrics/histogram_tester.h"
   7 #include "testing/gmock/include/gmock/gmock.h"
   8 #include "testing/gtest/include/gtest/gtest.h"
   9
  10 namespace scheduling_metrics {
  11
  12 TEST(TotalDurationMetricReporterTest, Test) {
  13   base::HistogramTester histogram_tester;
  14
  15   TotalDurationMetricReporter metric_reporter("TestHistogram.Positive",
  16                                               "TestHistogram.Negative");
  17
  18   metric_reporter.RecordAdditionalDuration(base::TimeDelta::FromSeconds(1));
  19   metric_reporter.RecordAdditionalDuration(base::TimeDelta::FromSeconds(2));
  20   metric_reporter.RecordAdditionalDuration(base::TimeDelta::FromSeconds(5));
  21
  22   metric_reporter.Reset();
  23
  24   metric_reporter.RecordAdditionalDuration(base::TimeDelta::FromSeconds(10));
  25
  26   std::map<base::Histogram::Sample, base::HistogramBase::Count> result;
  27
  28   for (const base::Bucket& bucket :
  29        histogram_tester.GetAllSamples("TestHistogram.Positive")) {
  30     result[bucket.min] += bucket.count;
  31   }
  32   for (const base::Bucket& bucket :
  33        histogram_tester.GetAllSamples("TestHistogram.Negative")) {
  34     result[bucket.min] -= bucket.count;
  35   }
  36
  37   // 1 and 3 correspond to "reverted" values.
  38   EXPECT_THAT(result, testing::UnorderedElementsAre(
  39                           std::make_pair(1, 0), std::make_pair(3, 0),
  40                           std::make_pair(8, 1), std::make_pair(10, 1)));
  41 }
  42
  43 }  // namespace scheduling_metrics