125 lines
4.2 KiB
C++
125 lines
4.2 KiB
C++
// Copyright 2017 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "base/metrics/single_sample_metrics.h"
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#include "base/memory/ptr_util.h"
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#include "base/metrics/dummy_histogram.h"
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#include "base/test/gtest_util.h"
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#include "base/test/metrics/histogram_tester.h"
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#include "testing/gtest/include/gtest/gtest.h"
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namespace base {
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namespace {
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const HistogramBase::Sample kMin = 1;
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const HistogramBase::Sample kMax = 10;
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const uint32_t kBucketCount = 10;
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const char kMetricName[] = "Single.Sample.Metric";
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class SingleSampleMetricsTest : public testing::Test {
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public:
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SingleSampleMetricsTest() = default;
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~SingleSampleMetricsTest() override {
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// Ensure we cleanup after ourselves.
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SingleSampleMetricsFactory::DeleteFactoryForTesting();
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}
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private:
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DISALLOW_COPY_AND_ASSIGN(SingleSampleMetricsTest);
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};
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} // namespace
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TEST_F(SingleSampleMetricsTest, DefaultFactoryGetSet) {
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SingleSampleMetricsFactory* factory = SingleSampleMetricsFactory::Get();
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ASSERT_TRUE(factory);
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// Same factory should be returned evermore.
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EXPECT_EQ(factory, SingleSampleMetricsFactory::Get());
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// Setting a factory after the default has been instantiated should fail.
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EXPECT_DCHECK_DEATH(SingleSampleMetricsFactory::SetFactory(
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WrapUnique<SingleSampleMetricsFactory>(nullptr)));
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}
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TEST_F(SingleSampleMetricsTest, CustomFactoryGetSet) {
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SingleSampleMetricsFactory* factory = new DefaultSingleSampleMetricsFactory();
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SingleSampleMetricsFactory::SetFactory(WrapUnique(factory));
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EXPECT_EQ(factory, SingleSampleMetricsFactory::Get());
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}
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TEST_F(SingleSampleMetricsTest, DefaultSingleSampleMetricNoValue) {
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SingleSampleMetricsFactory* factory = SingleSampleMetricsFactory::Get();
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HistogramTester tester;
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std::unique_ptr<SingleSampleMetric> metric =
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factory->CreateCustomCountsMetric(kMetricName, kMin, kMax, kBucketCount);
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metric.reset();
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// Verify that no sample is recorded if SetSample() is never called.
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tester.ExpectTotalCount(kMetricName, 0);
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}
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TEST_F(SingleSampleMetricsTest, DefaultSingleSampleMetricWithValue) {
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SingleSampleMetricsFactory* factory = SingleSampleMetricsFactory::Get();
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HistogramTester tester;
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std::unique_ptr<SingleSampleMetric> metric =
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factory->CreateCustomCountsMetric(kMetricName, kMin, kMax, kBucketCount);
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const HistogramBase::Sample kLastSample = 9;
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metric->SetSample(1);
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metric->SetSample(3);
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metric->SetSample(5);
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metric->SetSample(kLastSample);
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metric.reset();
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// Verify only the last sample sent to SetSample() is recorded.
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tester.ExpectUniqueSample(kMetricName, kLastSample, 1);
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// Verify construction implicitly by requesting a histogram with the same
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// parameters; this test relies on the fact that histogram objects are unique
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// per name. Different parameters will result in a Dummy histogram returned.
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EXPECT_EQ(
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DummyHistogram::GetInstance(),
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Histogram::FactoryGet(kMetricName, 1, 3, 3, HistogramBase::kNoFlags));
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EXPECT_NE(DummyHistogram::GetInstance(),
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Histogram::FactoryGet(kMetricName, kMin, kMax, kBucketCount,
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HistogramBase::kUmaTargetedHistogramFlag));
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}
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TEST_F(SingleSampleMetricsTest, MultipleMetricsAreDistinct) {
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SingleSampleMetricsFactory* factory = SingleSampleMetricsFactory::Get();
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HistogramTester tester;
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std::unique_ptr<SingleSampleMetric> metric =
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factory->CreateCustomCountsMetric(kMetricName, kMin, kMax, kBucketCount);
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std::unique_ptr<SingleSampleMetric> metric2 =
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factory->CreateCustomCountsMetric(kMetricName, kMin, kMax, kBucketCount);
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const char kMetricName2[] = "Single.Sample.Metric.2";
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std::unique_ptr<SingleSampleMetric> metric3 =
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factory->CreateCustomCountsMetric(kMetricName2, kMin, kMax, kBucketCount);
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const HistogramBase::Sample kSample1 = 5;
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metric->SetSample(kSample1);
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metric2->SetSample(kSample1);
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const HistogramBase::Sample kSample2 = 7;
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metric3->SetSample(kSample2);
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metric.reset();
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tester.ExpectUniqueSample(kMetricName, kSample1, 1);
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metric2.reset();
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tester.ExpectUniqueSample(kMetricName, kSample1, 2);
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metric3.reset();
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tester.ExpectUniqueSample(kMetricName2, kSample2, 1);
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}
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} // namespace base
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