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/*
* Copyright (C) 2020 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef ART_LIBARTBASE_BASE_METRICS_METRICS_TEST_H_
#define ART_LIBARTBASE_BASE_METRICS_METRICS_TEST_H_
#include "metrics.h"
#pragma clang diagnostic push
#pragma clang diagnostic error "-Wconversion"
namespace art {
namespace metrics {
namespace test {
// This namespace contains functions that are helpful for testing metrics but should not be used in
// production code.
// A trivial MetricsBackend that does nothing for all of the members. This can be overridden by
// test cases to test specific behaviors.
class TestBackendBase : public MetricsBackend {
public:
void BeginOrUpdateSession([[maybe_unused]] const SessionData& session_data) override {}
void BeginReport([[maybe_unused]] uint64_t timestamp_since_start_ms) override {}
void ReportCounter([[maybe_unused]] DatumId counter_type,
[[maybe_unused]] uint64_t value) override {}
void ReportHistogram([[maybe_unused]] DatumId histogram_type,
[[maybe_unused]] int64_t low_value_,
[[maybe_unused]] int64_t high_value,
[[maybe_unused]] const std::vector<uint32_t>& buckets) override {}
void EndReport() override {}
};
template <typename MetricType>
uint64_t CounterValue(const MetricType& counter) {
uint64_t counter_value{0};
struct CounterBackend : public TestBackendBase {
explicit CounterBackend(uint64_t* counter_value) : counter_value_{counter_value} {}
void ReportCounter(DatumId, uint64_t value) override { *counter_value_ = value; }
uint64_t* counter_value_;
} backend{&counter_value};
counter.Report({&backend});
return counter_value;
}
template <DatumId histogram_type, size_t num_buckets, int64_t low_value, int64_t high_value>
std::vector<uint32_t> GetBuckets(
const MetricsHistogram<histogram_type, num_buckets, low_value, high_value>& histogram) {
std::vector<uint32_t> buckets;
struct HistogramBackend : public TestBackendBase {
explicit HistogramBackend(std::vector<uint32_t>* buckets) : buckets_{buckets} {}
void ReportHistogram(DatumId, int64_t, int64_t, const std::vector<uint32_t>& buckets) override {
*buckets_ = buckets;
}
std::vector<uint32_t>* buckets_;
} backend{&buckets};
histogram.Report({&backend});
return buckets;
}
} // namespace test
} // namespace metrics
} // namespace art
#pragma clang diagnostic pop // -Wconversion
#endif // ART_LIBARTBASE_BASE_METRICS_METRICS_TEST_H_
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