components/metrics/histogram_manager_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/metrics/histogram_manager.h"
   6
   7 #include <string>
   8
   9 #include "base/basictypes.h"
  10 #include "testing/gtest/include/gtest/gtest.h"
  11
  12 namespace metrics {
  13
  14 // TODO(mef): crbug.com/441441. Move components/metrics/histogram_manager.*
  15 // files into components/android/cronet.
  16 // TODO(rtenneti): enable flaky HistogramBucketFields unit test.
  17 TEST(HistogramManager, DISABLED_HistogramBucketFields) {
  18   // Capture histograms at the start of the test to avoid later GetDeltas()
  19   // calls picking them up.
  20   std::vector<uint8> data_init;
  21   HistogramManager::GetInstance()->GetDeltas(&data_init);
  22
  23   // kNoFlags filter should record all histograms.
  24   UMA_HISTOGRAM_ENUMERATION("UmaHistogramManager", 1, 2);
  25
  26   std::vector<uint8> data;
  27   EXPECT_TRUE(HistogramManager::GetInstance()->GetDeltas(&data));
  28   EXPECT_FALSE(data.empty());
  29   ChromeUserMetricsExtension uma_proto;
  30   EXPECT_TRUE(uma_proto.ParseFromArray(
  31       reinterpret_cast<const char*>(&data[0]), data.size()));
  32   EXPECT_FALSE(data.empty());
  33
  34   const HistogramEventProto& histogram_proto =
  35       uma_proto.histogram_event(uma_proto.histogram_event_size() - 1);
  36   ASSERT_EQ(1, histogram_proto.bucket_size());
  37   EXPECT_LE(0, histogram_proto.bucket(0).min());
  38   EXPECT_LE(2, histogram_proto.bucket(0).max());
  39   EXPECT_EQ(1, histogram_proto.bucket(0).count());
  40
  41   UMA_HISTOGRAM_ENUMERATION("UmaHistogramManager2", 2, 3);
  42   std::vector<uint8> data2;
  43   EXPECT_TRUE(HistogramManager::GetInstance()->GetDeltas(&data2));
  44   EXPECT_FALSE(data2.empty());
  45   ChromeUserMetricsExtension uma_proto2;
  46   EXPECT_TRUE(uma_proto2.ParseFromArray(
  47       reinterpret_cast<const char*>(&data2[0]), data2.size()));
  48   EXPECT_FALSE(data2.empty());
  49
  50   const HistogramEventProto& histogram_proto2 =
  51       uma_proto2.histogram_event(uma_proto2.histogram_event_size() - 1);
  52   ASSERT_EQ(1, histogram_proto2.bucket_size());
  53   EXPECT_LE(0, histogram_proto2.bucket(0).min());
  54   EXPECT_LE(3, histogram_proto2.bucket(0).max());
  55   EXPECT_EQ(1, histogram_proto2.bucket(0).count());
  56 }
  57
  58 }  // namespace metrics