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catch2/tests/SelfTest/IntrospectiveTests/InternalBenchmark.tests.cpp
Martin Hořeňovský e1e6872c4c
Standardize header names and file locations 
This is both a really big and a really small commit. It is small in
that it only contains renaming, moving and modification of include
directives caused by this.

It is really big in the obvious way of touching something like 200
files.

The new rules for naming files is simple: headers use the `.hpp`
extension. The rules for physical file layout is still kinda in
progress, but the basics are also simple:
 * Significant parts of functionality get their own subfolder
   * Benchmarking is in `catch2/benchmark`
   * Matchers are in `catch2/matchers`
   * Generators are in `catch2/generators`
   * Reporters are in `catch2/reporters`
   * Baseline testing facilities are in `catch2/`
 * Various top level folders also contain `internal` subfolder,
   with files that users probably do not want to include directly,
   at least not until they have to write something like their own
   reporter.
    * The exact files in these subfolders is likely to change later
      on

Note that while some includes were cleaned up in this commit, it
is only the low hanging fruit and further cleanup using automatic
tooling will happen later.

Also note that various include guards, copyright notices and file
headers will also be standardized later, rather than in this commit.
2020-04-24 18:58:44 +02:00

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/*
* Created by Joachim on 16/04/2019.
* Adapted from donated nonius code.
*
* Distributed under the Boost Software License, Version 1.0. (See accompanying
* file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
*/
#include <catch2/catch_test_macros.hpp>
#include <catch2/catch_approx.hpp>
#include <catch2/catch_config.hpp>
#include <catch2/benchmark/catch_benchmark.hpp>
#include <catch2/benchmark/catch_chronometer.hpp>
#include <catch2/benchmark/detail/catch_analyse.hpp>
#include <catch2/benchmark/detail/catch_benchmark_function.hpp>
#include <catch2/benchmark/detail/catch_estimate_clock.hpp>
namespace {
struct manual_clock {
public:
using duration = std::chrono::nanoseconds;
using time_point = std::chrono::time_point<manual_clock, duration>;
using rep = duration::rep;
using period = duration::period;
enum { is_steady = true };
static time_point now() {
return time_point(duration(tick()));
}
static void advance(int ticks = 1) {
tick() += ticks;
}
private:
static rep& tick() {
static rep the_tick = 0;
return the_tick;
}
};
struct counting_clock {
public:
using duration = std::chrono::nanoseconds;
using time_point = std::chrono::time_point<counting_clock, duration>;
using rep = duration::rep;
using period = duration::period;
enum { is_steady = true };
static time_point now() {
static rep ticks = 0;
return time_point(duration(ticks += rate()));
}
static void set_rate(rep new_rate) { rate() = new_rate; }
private:
static rep& rate() {
static rep the_rate = 1;
return the_rate;
}
};
struct TestChronometerModel : Catch::Benchmark::Detail::ChronometerConcept {
int started = 0;
int finished = 0;
void start() override { ++started; }
void finish() override { ++finished; }
};
} // namespace
TEST_CASE("warmup", "[benchmark]") {
auto rate = 1000;
counting_clock::set_rate(rate);
auto start = counting_clock::now();
auto iterations = Catch::Benchmark::Detail::warmup<counting_clock>();
auto end = counting_clock::now();
REQUIRE((iterations * rate) > Catch::Benchmark::Detail::warmup_time.count());
REQUIRE((end - start) > Catch::Benchmark::Detail::warmup_time);
}
TEST_CASE("resolution", "[benchmark]") {
auto rate = 1000;
counting_clock::set_rate(rate);
size_t count = 10;
auto res = Catch::Benchmark::Detail::resolution<counting_clock>(static_cast<int>(count));
REQUIRE(res.size() == count);
for (size_t i = 1; i < count; ++i) {
REQUIRE(res[i] == rate);
}
}
TEST_CASE("estimate_clock_resolution", "[benchmark]") {
auto rate = 2'000;
counting_clock::set_rate(rate);
int iters = 160'000;
auto res = Catch::Benchmark::Detail::estimate_clock_resolution<counting_clock>(iters);
REQUIRE(res.mean.count() == rate);
REQUIRE(res.outliers.total() == 0);
}
TEST_CASE("benchmark function call", "[benchmark]") {
SECTION("without chronometer") {
auto called = 0;
auto model = TestChronometerModel{};
auto meter = Catch::Benchmark::Chronometer{ model, 1 };
auto fn = Catch::Benchmark::Detail::BenchmarkFunction{ [&] {
CHECK(model.started == 1);
CHECK(model.finished == 0);
++called;
} };
fn(meter);
CHECK(model.started == 1);
CHECK(model.finished == 1);
CHECK(called == 1);
}
SECTION("with chronometer") {
auto called = 0;
auto model = TestChronometerModel{};
auto meter = Catch::Benchmark::Chronometer{ model, 1 };
auto fn = Catch::Benchmark::Detail::BenchmarkFunction{ [&](Catch::Benchmark::Chronometer) {
CHECK(model.started == 0);
CHECK(model.finished == 0);
++called;
} };
fn(meter);
CHECK(model.started == 0);
CHECK(model.finished == 0);
CHECK(called == 1);
}
}
TEST_CASE("uniform samples", "[benchmark]") {
std::vector<double> samples(100);
std::fill(samples.begin(), samples.end(), 23);
using it = std::vector<double>::iterator;
auto e = Catch::Benchmark::Detail::bootstrap(0.95, samples.begin(), samples.end(), samples, [](it a, it b) {
auto sum = std::accumulate(a, b, 0.);
return sum / (b - a);
});
CHECK(e.point == 23);
CHECK(e.upper_bound == 23);
CHECK(e.lower_bound == 23);
CHECK(e.confidence_interval == 0.95);
}
TEST_CASE("normal_cdf", "[benchmark]") {
using Catch::Benchmark::Detail::normal_cdf;
using Catch::Approx;
CHECK(normal_cdf(0.000000) == Approx(0.50000000000000000));
CHECK(normal_cdf(1.000000) == Approx(0.84134474606854293));
CHECK(normal_cdf(-1.000000) == Approx(0.15865525393145705));
CHECK(normal_cdf(2.809729) == Approx(0.99752083845315409));
CHECK(normal_cdf(-1.352570) == Approx(0.08809652095066035));
}
TEST_CASE("erfc_inv", "[benchmark]") {
using Catch::Benchmark::Detail::erfc_inv;
using Catch::Approx;
CHECK(erfc_inv(1.103560) == Approx(-0.09203687623843015));
CHECK(erfc_inv(1.067400) == Approx(-0.05980291115763361));
CHECK(erfc_inv(0.050000) == Approx(1.38590382434967796));
}
TEST_CASE("normal_quantile", "[benchmark]") {
using Catch::Benchmark::Detail::normal_quantile;
using Catch::Approx;
CHECK(normal_quantile(0.551780) == Approx(0.13015979861484198));
CHECK(normal_quantile(0.533700) == Approx(0.08457408802851875));
CHECK(normal_quantile(0.025000) == Approx(-1.95996398454005449));
}
TEST_CASE("mean", "[benchmark]") {
std::vector<double> x{ 10., 20., 14., 16., 30., 24. };
auto m = Catch::Benchmark::Detail::mean(x.begin(), x.end());
REQUIRE(m == 19.);
}
TEST_CASE("weighted_average_quantile", "[benchmark]") {
std::vector<double> x{ 10., 20., 14., 16., 30., 24. };
auto q1 = Catch::Benchmark::Detail::weighted_average_quantile(1, 4, x.begin(), x.end());
auto med = Catch::Benchmark::Detail::weighted_average_quantile(1, 2, x.begin(), x.end());
auto q3 = Catch::Benchmark::Detail::weighted_average_quantile(3, 4, x.begin(), x.end());
REQUIRE(q1 == 14.5);
REQUIRE(med == 18.);
REQUIRE(q3 == 23.);
}
TEST_CASE("classify_outliers", "[benchmark]") {
auto require_outliers = [](Catch::Benchmark::OutlierClassification o, int los, int lom, int him, int his) {
REQUIRE(o.low_severe == los);
REQUIRE(o.low_mild == lom);
REQUIRE(o.high_mild == him);
REQUIRE(o.high_severe == his);
REQUIRE(o.total() == los + lom + him + his);
};
SECTION("none") {
std::vector<double> x{ 10., 20., 14., 16., 30., 24. };
auto o = Catch::Benchmark::Detail::classify_outliers(x.begin(), x.end());
REQUIRE(o.samples_seen == static_cast<int>(x.size()));
require_outliers(o, 0, 0, 0, 0);
}
SECTION("low severe") {
std::vector<double> x{ -12., 20., 14., 16., 30., 24. };
auto o = Catch::Benchmark::Detail::classify_outliers(x.begin(), x.end());
REQUIRE(o.samples_seen == static_cast<int>(x.size()));
require_outliers(o, 1, 0, 0, 0);
}
SECTION("low mild") {
std::vector<double> x{ 1., 20., 14., 16., 30., 24. };
auto o = Catch::Benchmark::Detail::classify_outliers(x.begin(), x.end());
REQUIRE(o.samples_seen == static_cast<int>(x.size()));
require_outliers(o, 0, 1, 0, 0);
}
SECTION("high mild") {
std::vector<double> x{ 10., 20., 14., 16., 36., 24. };
auto o = Catch::Benchmark::Detail::classify_outliers(x.begin(), x.end());
REQUIRE(o.samples_seen == static_cast<int>(x.size()));
require_outliers(o, 0, 0, 1, 0);
}
SECTION("high severe") {
std::vector<double> x{ 10., 20., 14., 16., 49., 24. };
auto o = Catch::Benchmark::Detail::classify_outliers(x.begin(), x.end());
REQUIRE(o.samples_seen == static_cast<int>(x.size()));
require_outliers(o, 0, 0, 0, 1);
}
SECTION("mixed") {
std::vector<double> x{ -20., 20., 14., 16., 39., 24. };
auto o = Catch::Benchmark::Detail::classify_outliers(x.begin(), x.end());
REQUIRE(o.samples_seen == static_cast<int>(x.size()));
require_outliers(o, 1, 0, 1, 0);
}
}
TEST_CASE("analyse", "[approvals][benchmark]") {
Catch::ConfigData data{};
data.benchmarkConfidenceInterval = 0.95;
data.benchmarkNoAnalysis = false;
data.benchmarkResamples = 1000;
data.benchmarkSamples = 99;
Catch::Config config{data};
using Duration = Catch::Benchmark::FloatDuration<Catch::Benchmark::default_clock>;
Catch::Benchmark::Environment<Duration> env;
std::vector<Duration> samples(99);
for (size_t i = 0; i < samples.size(); ++i) {
samples[i] = Duration(23 + (i % 3 - 1));
}
auto analysis = Catch::Benchmark::Detail::analyse(config, env, samples.begin(), samples.end());
CHECK(analysis.mean.point.count() == 23);
CHECK(analysis.mean.lower_bound.count() < 23);
CHECK(analysis.mean.lower_bound.count() > 22);
CHECK(analysis.mean.upper_bound.count() > 23);
CHECK(analysis.mean.upper_bound.count() < 24);
CHECK(analysis.standard_deviation.point.count() > 0.5);
CHECK(analysis.standard_deviation.point.count() < 1);
CHECK(analysis.standard_deviation.lower_bound.count() > 0.5);
CHECK(analysis.standard_deviation.lower_bound.count() < 1);
CHECK(analysis.standard_deviation.upper_bound.count() > 0.5);
CHECK(analysis.standard_deviation.upper_bound.count() < 1);
CHECK(analysis.outliers.total() == 0);
CHECK(analysis.outliers.low_mild == 0);
CHECK(analysis.outliers.low_severe == 0);
CHECK(analysis.outliers.high_mild == 0);
CHECK(analysis.outliers.high_severe == 0);
CHECK(analysis.outliers.samples_seen == samples.size());
CHECK(analysis.outlier_variance < 0.5);
CHECK(analysis.outlier_variance > 0);
}
TEST_CASE("analyse no analysis", "[benchmark]") {
Catch::ConfigData data{};
data.benchmarkConfidenceInterval = 0.95;
data.benchmarkNoAnalysis = true;
data.benchmarkResamples = 1000;
data.benchmarkSamples = 99;
Catch::Config config{ data };
using Duration = Catch::Benchmark::FloatDuration<Catch::Benchmark::default_clock>;
Catch::Benchmark::Environment<Duration> env;
std::vector<Duration> samples(99);
for (size_t i = 0; i < samples.size(); ++i) {
samples[i] = Duration(23 + (i % 3 - 1));
}
auto analysis = Catch::Benchmark::Detail::analyse(config, env, samples.begin(), samples.end());
CHECK(analysis.mean.point.count() == 23);
CHECK(analysis.mean.lower_bound.count() == 23);
CHECK(analysis.mean.upper_bound.count() == 23);
CHECK(analysis.standard_deviation.point.count() == 0);
CHECK(analysis.standard_deviation.lower_bound.count() == 0);
CHECK(analysis.standard_deviation.upper_bound.count() == 0);
CHECK(analysis.outliers.total() == 0);
CHECK(analysis.outliers.low_mild == 0);
CHECK(analysis.outliers.low_severe == 0);
CHECK(analysis.outliers.high_mild == 0);
CHECK(analysis.outliers.high_severe == 0);
CHECK(analysis.outliers.samples_seen == 0);
CHECK(analysis.outlier_variance == 0);
}
TEST_CASE("run_for_at_least, int", "[benchmark]") {
manual_clock::duration time(100);
int old_x = 1;
auto Timing = Catch::Benchmark::Detail::run_for_at_least<manual_clock>(time, 1, [&old_x](int x) -> int {
CHECK(x >= old_x);
manual_clock::advance(x);
old_x = x;
return x + 17;
});
REQUIRE(Timing.elapsed >= time);
REQUIRE(Timing.result == Timing.iterations + 17);
REQUIRE(Timing.iterations >= time.count());
}
TEST_CASE("run_for_at_least, chronometer", "[benchmark]") {
manual_clock::duration time(100);
int old_runs = 1;
auto Timing = Catch::Benchmark::Detail::run_for_at_least<manual_clock>(time, 1, [&old_runs](Catch::Benchmark::Chronometer meter) -> int {
CHECK(meter.runs() >= old_runs);
manual_clock::advance(100);
meter.measure([] {
manual_clock::advance(1);
});
old_runs = meter.runs();
return meter.runs() + 17;
});
REQUIRE(Timing.elapsed >= time);
REQUIRE(Timing.result == Timing.iterations + 17);
REQUIRE(Timing.iterations >= time.count());
}
TEST_CASE("measure", "[benchmark]") {
auto r = Catch::Benchmark::Detail::measure<manual_clock>([](int x) -> int {
CHECK(x == 17);
manual_clock::advance(42);
return 23;
}, 17);
auto s = Catch::Benchmark::Detail::measure<manual_clock>([](int x) -> int {
CHECK(x == 23);
manual_clock::advance(69);
return 17;
}, 23);
CHECK(r.elapsed.count() == 42);
CHECK(r.result == 23);
CHECK(r.iterations == 1);
CHECK(s.elapsed.count() == 69);
CHECK(s.result == 17);
CHECK(s.iterations == 1);
}
TEST_CASE("run benchmark", "[benchmark][approvals]") {
counting_clock::set_rate(1000);
auto start = counting_clock::now();
Catch::Benchmark::Benchmark bench{ "Test Benchmark", [](Catch::Benchmark::Chronometer meter) {
counting_clock::set_rate(100000);
meter.measure([] { return counting_clock::now(); });
} };
bench.run<counting_clock>();
auto end = counting_clock::now();
CHECK((end - start).count() == 2867251000);
}
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