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catch2/tests/SelfTest/IntrospectiveTests/InternalBenchmark.tests.cpp
Martin Hořeňovský fc3d11b1d1
Add Wfloat-equal to default-enabled warnings 
This is kinda messy, because there is no good way to signal to
the compiler that some code uses direct comparison of floating
point numbers intentionally, so instead we have to use diagnostic
pragmas.

We also have to over-suppress the test files, because Clang (and
possibly GCC) still issue warnings from template instantiation
even if the instantion site is under warning suppression, so the
template definition has to be under warning suppression as well.

Closes #2406
2022-05-14 15:47:20 +02:00

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// Copyright Catch2 Authors
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE_1_0.txt or copy at
// https://www.boost.org/LICENSE_1_0.txt)
// SPDX-License-Identifier: BSL-1.0
// Adapted from donated nonius code.
#if defined( __GNUC__ ) || defined( __clang__ )
# pragma GCC diagnostic ignored "-Wfloat-equal"
#endif
#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 == static_cast<int>(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);
}
TEST_CASE("Failing benchmarks", "[!benchmark][.approvals]") {
SECTION("empty", "Benchmark that has been optimized away (because it is empty)") {
BENCHMARK("Empty benchmark") {};
}
SECTION("throw", "Benchmark that throws an exception") {
BENCHMARK("Throwing benchmark") {
throw "just a plain literal, bleh";
};
}
SECTION("assert", "Benchmark that asserts inside") {
BENCHMARK("Asserting benchmark") {
REQUIRE(1 == 2);
};
}
SECTION("fail", "Benchmark that fails inside") {
BENCHMARK("FAIL'd benchmark") {
FAIL("This benchmark only fails, nothing else");
};
}
}
TEST_CASE( "Failing benchmark respects should-fail",
"[!shouldfail][!benchmark][.approvals]" ) {
BENCHMARK( "Asserting benchmark" ) { REQUIRE( 1 == 2 ); };
}
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