1 files changed, 136 insertions, 0 deletions
diff --git a/third_party/libwebrtc/system_wrappers/source/metrics_unittest.cc b/third_party/libwebrtc/system_wrappers/source/metrics_unittest.cc
new file mode 100644
index 0000000000..cd3807748c
--- /dev/null
+++ b/third_party/libwebrtc/system_wrappers/source/metrics_unittest.cc
@@ -0,0 +1,136 @@
+/*
+ *  Copyright (c) 2015 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "system_wrappers/include/metrics.h"
+
+#include "absl/strings/string_view.h"
+#include "test/gmock.h"
+#include "test/gtest.h"
+
+using ::testing::ElementsAre;
+using ::testing::IsEmpty;
+using ::testing::Pair;
+
+#if RTC_METRICS_ENABLED
+namespace webrtc {
+namespace {
+const int kSample = 22;
+
+void AddSparseSample(absl::string_view name, int sample) {
+  RTC_HISTOGRAM_COUNTS_SPARSE_100(name, sample);
+}
+void AddSampleWithVaryingName(int index, absl::string_view name, int sample) {
+  RTC_HISTOGRAMS_COUNTS_100(index, name, sample);
+}
+}  // namespace
+
+class MetricsTest : public ::testing::Test {
+ public:
+  MetricsTest() {}
+
+ protected:
+  void SetUp() override { metrics::Reset(); }
+};
+
+TEST_F(MetricsTest, InitiallyNoSamples) {
+  EXPECT_EQ(0, metrics::NumSamples("NonExisting"));
+  EXPECT_EQ(0, metrics::NumEvents("NonExisting", kSample));
+  EXPECT_THAT(metrics::Samples("NonExisting"), IsEmpty());
+}
+
+TEST_F(MetricsTest, RtcHistogramPercent_AddSample) {
+  const std::string kName = "Percentage";
+  RTC_HISTOGRAM_PERCENTAGE(kName, kSample);
+  EXPECT_EQ(1, metrics::NumSamples(kName));
+  EXPECT_EQ(1, metrics::NumEvents(kName, kSample));
+  EXPECT_THAT(metrics::Samples(kName), ElementsAre(Pair(kSample, 1)));
+}
+
+TEST_F(MetricsTest, RtcHistogramEnumeration_AddSample) {
+  const std::string kName = "Enumeration";
+  RTC_HISTOGRAM_ENUMERATION(kName, kSample, kSample + 1);
+  EXPECT_EQ(1, metrics::NumSamples(kName));
+  EXPECT_EQ(1, metrics::NumEvents(kName, kSample));
+  EXPECT_THAT(metrics::Samples(kName), ElementsAre(Pair(kSample, 1)));
+}
+
+TEST_F(MetricsTest, RtcHistogramBoolean_AddSample) {
+  const std::string kName = "Boolean";
+  const int kSample = 0;
+  RTC_HISTOGRAM_BOOLEAN(kName, kSample);
+  EXPECT_EQ(1, metrics::NumSamples(kName));
+  EXPECT_EQ(1, metrics::NumEvents(kName, kSample));
+  EXPECT_THAT(metrics::Samples(kName), ElementsAre(Pair(kSample, 1)));
+}
+
+TEST_F(MetricsTest, RtcHistogramCountsSparse_AddSample) {
+  const std::string kName = "CountsSparse100";
+  RTC_HISTOGRAM_COUNTS_SPARSE_100(kName, kSample);
+  EXPECT_EQ(1, metrics::NumSamples(kName));
+  EXPECT_EQ(1, metrics::NumEvents(kName, kSample));
+  EXPECT_THAT(metrics::Samples(kName), ElementsAre(Pair(kSample, 1)));
+}
+
+TEST_F(MetricsTest, RtcHistogramCounts_AddSample) {
+  const std::string kName = "Counts100";
+  RTC_HISTOGRAM_COUNTS_100(kName, kSample);
+  EXPECT_EQ(1, metrics::NumSamples(kName));
+  EXPECT_EQ(1, metrics::NumEvents(kName, kSample));
+  EXPECT_THAT(metrics::Samples(kName), ElementsAre(Pair(kSample, 1)));
+}
+
+TEST_F(MetricsTest, RtcHistogramCounts_AddMultipleSamples) {
+  const std::string kName = "Counts200";
+  const int kNumSamples = 10;
+  std::map<int, int> samples;
+  for (int i = 1; i <= kNumSamples; ++i) {
+    RTC_HISTOGRAM_COUNTS_200(kName, i);
+    EXPECT_EQ(1, metrics::NumEvents(kName, i));
+    EXPECT_EQ(i, metrics::NumSamples(kName));
+    samples[i] = 1;
+  }
+  EXPECT_EQ(samples, metrics::Samples(kName));
+}
+
+TEST_F(MetricsTest, RtcHistogramsCounts_AddSample) {
+  AddSampleWithVaryingName(0, "Name1", kSample);
+  AddSampleWithVaryingName(1, "Name2", kSample + 1);
+  AddSampleWithVaryingName(2, "Name3", kSample + 2);
+  EXPECT_EQ(1, metrics::NumSamples("Name1"));
+  EXPECT_EQ(1, metrics::NumSamples("Name2"));
+  EXPECT_EQ(1, metrics::NumSamples("Name3"));
+  EXPECT_EQ(1, metrics::NumEvents("Name1", kSample + 0));
+  EXPECT_EQ(1, metrics::NumEvents("Name2", kSample + 1));
+  EXPECT_EQ(1, metrics::NumEvents("Name3", kSample + 2));
+  EXPECT_THAT(metrics::Samples("Name1"), ElementsAre(Pair(kSample + 0, 1)));
+  EXPECT_THAT(metrics::Samples("Name2"), ElementsAre(Pair(kSample + 1, 1)));
+  EXPECT_THAT(metrics::Samples("Name3"), ElementsAre(Pair(kSample + 2, 1)));
+}
+
+#if RTC_DCHECK_IS_ON && GTEST_HAS_DEATH_TEST && !defined(WEBRTC_ANDROID)
+using MetricsDeathTest = MetricsTest;
+TEST_F(MetricsDeathTest, RtcHistogramsCounts_InvalidIndex) {
+  EXPECT_DEATH(RTC_HISTOGRAMS_COUNTS_1000(-1, "Name", kSample), "");
+  EXPECT_DEATH(RTC_HISTOGRAMS_COUNTS_1000(3, "Name", kSample), "");
+  EXPECT_DEATH(RTC_HISTOGRAMS_COUNTS_1000(3u, "Name", kSample), "");
+}
+#endif
+
+TEST_F(MetricsTest, RtcHistogramSparse_NonConstantNameWorks) {
+  AddSparseSample("Sparse1", kSample);
+  AddSparseSample("Sparse2", kSample);
+  EXPECT_EQ(1, metrics::NumSamples("Sparse1"));
+  EXPECT_EQ(1, metrics::NumSamples("Sparse2"));
+  EXPECT_THAT(metrics::Samples("Sparse1"), ElementsAre(Pair(kSample, 1)));
+  EXPECT_THAT(metrics::Samples("Sparse2"), ElementsAre(Pair(kSample, 1)));
+}
+
+}  // namespace webrtc
+#endif