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      1 /*
      2  *  Copyright (c) 2015 The WebRTC project authors. All Rights Reserved.
      3  *
      4  *  Use of this source code is governed by a BSD-style license
      5  *  that can be found in the LICENSE file in the root of the source
      6  *  tree. An additional intellectual property rights grant can be found
      7  *  in the file PATENTS.  All contributing project authors may
      8  *  be found in the AUTHORS file in the root of the source tree.
      9  */
     10 
     11 #include "testing/gtest/include/gtest/gtest.h"
     12 
     13 #include "webrtc/system_wrappers/include/metrics.h"
     14 #include "webrtc/test/histogram.h"
     15 
     16 namespace webrtc {
     17 namespace {
     18 const int kSample = 22;
     19 const std::string kName = "Name";
     20 
     21 void AddSparseSample(const std::string& name, int sample) {
     22   RTC_HISTOGRAM_COUNTS_SPARSE_100(name, sample);
     23 }
     24 #if GTEST_HAS_DEATH_TEST && !defined(WEBRTC_ANDROID)
     25 void AddSample(const std::string& name, int sample) {
     26   RTC_HISTOGRAM_COUNTS_100(name, sample);
     27 }
     28 #endif  // GTEST_HAS_DEATH_TEST && !defined(WEBRTC_ANDROID)
     29 }  // namespace
     30 
     31 TEST(MetricsTest, InitiallyNoSamples) {
     32   test::ClearHistograms();
     33   EXPECT_EQ(0, test::NumHistogramSamples(kName));
     34   EXPECT_EQ(-1, test::LastHistogramSample(kName));
     35 }
     36 
     37 TEST(MetricsTest, RtcHistogramPercent_AddSample) {
     38   test::ClearHistograms();
     39   RTC_HISTOGRAM_PERCENTAGE(kName, kSample);
     40   EXPECT_EQ(1, test::NumHistogramSamples(kName));
     41   EXPECT_EQ(kSample, test::LastHistogramSample(kName));
     42 }
     43 
     44 TEST(MetricsTest, RtcHistogramEnumeration_AddSample) {
     45   test::ClearHistograms();
     46   RTC_HISTOGRAM_ENUMERATION(kName, kSample, kSample + 1);
     47   EXPECT_EQ(1, test::NumHistogramSamples(kName));
     48   EXPECT_EQ(kSample, test::LastHistogramSample(kName));
     49 }
     50 
     51 TEST(MetricsTest, RtcHistogramCountsSparse_AddSample) {
     52   test::ClearHistograms();
     53   RTC_HISTOGRAM_COUNTS_SPARSE_100(kName, kSample);
     54   EXPECT_EQ(1, test::NumHistogramSamples(kName));
     55   EXPECT_EQ(kSample, test::LastHistogramSample(kName));
     56 }
     57 
     58 TEST(MetricsTest, RtcHistogramCounts_AddSample) {
     59   test::ClearHistograms();
     60   RTC_HISTOGRAM_COUNTS_100(kName, kSample);
     61   EXPECT_EQ(1, test::NumHistogramSamples(kName));
     62   EXPECT_EQ(kSample, test::LastHistogramSample(kName));
     63 }
     64 
     65 TEST(MetricsTest, RtcHistogramCounts_AddMultipleSamples) {
     66   test::ClearHistograms();
     67   const int kNumSamples = 10;
     68   for (int i = 0; i < kNumSamples; ++i) {
     69     RTC_HISTOGRAM_COUNTS_100(kName, i);
     70   }
     71   EXPECT_EQ(kNumSamples, test::NumHistogramSamples(kName));
     72   EXPECT_EQ(kNumSamples - 1, test::LastHistogramSample(kName));
     73 }
     74 
     75 TEST(MetricsTest, RtcHistogramSparse_NonConstantNameWorks) {
     76   test::ClearHistograms();
     77   AddSparseSample("Name1", kSample);
     78   AddSparseSample("Name2", kSample);
     79   EXPECT_EQ(1, test::NumHistogramSamples("Name1"));
     80   EXPECT_EQ(1, test::NumHistogramSamples("Name2"));
     81 }
     82 
     83 #if GTEST_HAS_DEATH_TEST && !defined(WEBRTC_ANDROID)
     84 TEST(MetricsTest, RtcHistogram_FailsForNonConstantName) {
     85   test::ClearHistograms();
     86   AddSample("Name1", kSample);
     87   EXPECT_DEATH(AddSample("Name2", kSample), "");
     88 }
     89 #endif  // GTEST_HAS_DEATH_TEST && !defined(WEBRTC_ANDROID)
     90 
     91 }  // namespace webrtc
     92