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25acf220a4
Recently the library added a new ranged-for variant of the KeepRunning loop that is much faster. For this reason it should be preferred in all new code. Because a library, its documentation, and its tests should all embody the best practices of using the library, this patch changes all but a few usages of KeepRunning() into for (auto _ : state). The remaining usages in the tests and documentation persist only to document and test behavior that is different between the two formulations. Also note that because the range-for loop requires C++11, the KeepRunning variant has not been deprecated at this time.
105 lines
2.2 KiB
C++
105 lines
2.2 KiB
C++
#include "benchmark/benchmark.h"
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#include <cassert>
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#include <cmath>
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#include <cstdint>
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#include <cstdlib>
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#include <iostream>
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#include <limits>
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#include <sstream>
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#include <string>
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namespace {
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class TestReporter : public benchmark::ConsoleReporter {
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public:
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virtual bool ReportContext(const Context& context) {
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return ConsoleReporter::ReportContext(context);
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};
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virtual void ReportRuns(const std::vector<Run>& report) {
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++count_;
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ConsoleReporter::ReportRuns(report);
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};
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TestReporter() : count_(0) {}
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virtual ~TestReporter() {}
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size_t GetCount() const { return count_; }
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private:
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mutable size_t count_;
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};
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} // end namespace
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static void NoPrefix(benchmark::State& state) {
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for (auto _ : state) {
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}
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}
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BENCHMARK(NoPrefix);
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static void BM_Foo(benchmark::State& state) {
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for (auto _ : state) {
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}
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}
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BENCHMARK(BM_Foo);
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static void BM_Bar(benchmark::State& state) {
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for (auto _ : state) {
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}
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}
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BENCHMARK(BM_Bar);
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static void BM_FooBar(benchmark::State& state) {
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for (auto _ : state) {
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}
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}
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BENCHMARK(BM_FooBar);
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static void BM_FooBa(benchmark::State& state) {
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for (auto _ : state) {
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}
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}
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BENCHMARK(BM_FooBa);
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int main(int argc, char **argv) {
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bool list_only = false;
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for (int i = 0; i < argc; ++i)
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list_only |= std::string(argv[i]).find("--benchmark_list_tests") !=
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std::string::npos;
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benchmark::Initialize(&argc, argv);
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TestReporter test_reporter;
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const size_t returned_count =
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benchmark::RunSpecifiedBenchmarks(&test_reporter);
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if (argc == 2) {
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// Make sure we ran all of the tests
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std::stringstream ss(argv[1]);
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size_t expected_return;
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ss >> expected_return;
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if (returned_count != expected_return) {
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std::cerr << "ERROR: Expected " << expected_return
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<< " tests to match the filter but returned_count = "
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<< returned_count << std::endl;
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return -1;
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}
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const size_t expected_reports = list_only ? 0 : expected_return;
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const size_t reports_count = test_reporter.GetCount();
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if (reports_count != expected_reports) {
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std::cerr << "ERROR: Expected " << expected_reports
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<< " tests to be run but reported_count = " << reports_count
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<< std::endl;
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return -1;
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}
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}
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return 0;
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}
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