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// Copyright 2016 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "base/metrics/histogram_functions.h"
#include "base/metrics/histogram_macros.h"
#include "base/test/histogram_tester.h"
#include "base/time/time.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace base {
enum UmaHistogramTestingEnum {
UMA_HISTOGRAM_TESTING_ENUM_FIRST,
UMA_HISTOGRAM_TESTING_ENUM_SECOND,
UMA_HISTOGRAM_TESTING_ENUM_THIRD
};
TEST(HistogramFunctionsTest, HistogramExactLinear) {
std::string histogram("Testing.UMA.HistogramExactLinear");
HistogramTester tester;
UmaHistogramExactLinear(histogram, 10, 100);
tester.ExpectUniqueSample(histogram, 10, 1);
UmaHistogramExactLinear(histogram, 20, 100);
UmaHistogramExactLinear(histogram, 10, 100);
tester.ExpectBucketCount(histogram, 10, 2);
tester.ExpectBucketCount(histogram, 20, 1);
tester.ExpectTotalCount(histogram, 3);
// Test linear buckets overflow.
UmaHistogramExactLinear(histogram, 200, 100);
tester.ExpectBucketCount(histogram, 101, 1);
tester.ExpectTotalCount(histogram, 4);
// Test linear buckets underflow.
UmaHistogramExactLinear(histogram, 0, 100);
tester.ExpectBucketCount(histogram, 0, 1);
tester.ExpectTotalCount(histogram, 5);
}
TEST(HistogramFunctionsTest, HistogramEnumeration) {
std::string histogram("Testing.UMA.HistogramEnumeration");
HistogramTester tester;
UmaHistogramEnumeration(histogram, UMA_HISTOGRAM_TESTING_ENUM_FIRST,
UMA_HISTOGRAM_TESTING_ENUM_THIRD);
tester.ExpectUniqueSample(histogram, UMA_HISTOGRAM_TESTING_ENUM_FIRST, 1);
// Verify the overflow & underflow bucket exists.
UMA_HISTOGRAM_ENUMERATION(
histogram, static_cast<int>(UMA_HISTOGRAM_TESTING_ENUM_THIRD) + 10,
UMA_HISTOGRAM_TESTING_ENUM_THIRD);
tester.ExpectBucketCount(
histogram, static_cast<int>(UMA_HISTOGRAM_TESTING_ENUM_THIRD) + 1, 1);
tester.ExpectTotalCount(histogram, 2);
}
TEST(HistogramFunctionsTest, HistogramBoolean) {
std::string histogram("Testing.UMA.HistogramBoolean");
HistogramTester tester;
UmaHistogramBoolean(histogram, true);
tester.ExpectUniqueSample(histogram, 1, 1);
UmaHistogramBoolean(histogram, false);
tester.ExpectBucketCount(histogram, 0, 1);
tester.ExpectTotalCount(histogram, 2);
}
TEST(HistogramFunctionsTest, HistogramPercentage) {
std::string histogram("Testing.UMA.HistogramPercentage");
HistogramTester tester;
UmaHistogramPercentage(histogram, 50);
tester.ExpectUniqueSample(histogram, 50, 1);
// Test overflows.
UmaHistogramPercentage(histogram, 110);
tester.ExpectBucketCount(histogram, 101, 1);
tester.ExpectTotalCount(histogram, 2);
}
TEST(HistogramFunctionsTest, HistogramCounts) {
std::string histogram("Testing.UMA.HistogramCount.Custom");
HistogramTester tester;
UmaHistogramCustomCounts(histogram, 10, 1, 100, 10);
tester.ExpectUniqueSample(histogram, 10, 1);
UmaHistogramCustomCounts(histogram, 20, 1, 100, 10);
UmaHistogramCustomCounts(histogram, 20, 1, 100, 10);
UmaHistogramCustomCounts(histogram, 20, 1, 100, 10);
tester.ExpectBucketCount(histogram, 20, 3);
tester.ExpectTotalCount(histogram, 4);
UmaHistogramCustomCounts(histogram, 110, 1, 100, 10);
tester.ExpectBucketCount(histogram, 101, 1);
tester.ExpectTotalCount(histogram, 5);
}
TEST(HistogramFunctionsTest, HistogramTimes) {
std::string histogram("Testing.UMA.HistogramTimes");
HistogramTester tester;
UmaHistogramTimes(histogram, TimeDelta::FromSeconds(1));
tester.ExpectTimeBucketCount(histogram, TimeDelta::FromSeconds(1), 1);
tester.ExpectTotalCount(histogram, 1);
UmaHistogramTimes(histogram, TimeDelta::FromSeconds(9));
tester.ExpectTimeBucketCount(histogram, TimeDelta::FromSeconds(9), 1);
tester.ExpectTotalCount(histogram, 2);
UmaHistogramTimes(histogram, TimeDelta::FromSeconds(10)); // Overflows
tester.ExpectTimeBucketCount(histogram, TimeDelta::FromSeconds(10), 1);
UmaHistogramTimes(histogram, TimeDelta::FromSeconds(20)); // Overflows.
// Check the value by picking any overflow time.
tester.ExpectTimeBucketCount(histogram, TimeDelta::FromSeconds(11), 2);
tester.ExpectTotalCount(histogram, 4);
}
} // namespace base.
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