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#include <cassert>
#include <climits>
#include <cmath>
#include <cstdlib>
#include <cstring>
#include <iostream>
#include <string>
#include <vector>
#include "benchmark/benchmark.h"
// Tests that we can specify the min time with
// --benchmark_min_time=<NUM> (no suffix needed) OR
// --benchmark_min_time=<NUM>s
namespace {
// This is from benchmark.h
typedef int64_t IterationCount;
class TestReporter : public benchmark::ConsoleReporter {
public:
virtual bool ReportContext(const Context& context) BENCHMARK_OVERRIDE {
return ConsoleReporter::ReportContext(context);
};
virtual void ReportRuns(const std::vector<Run>& report) BENCHMARK_OVERRIDE {
assert(report.size() == 1);
ConsoleReporter::ReportRuns(report);
};
virtual void ReportRunsConfig(double min_time, bool /* has_explicit_iters */,
IterationCount /* iters */) BENCHMARK_OVERRIDE {
min_times_.push_back(min_time);
}
TestReporter() {}
virtual ~TestReporter() {}
const std::vector<double>& GetMinTimes() const { return min_times_; }
private:
std::vector<double> min_times_;
};
bool AlmostEqual(double a, double b) {
return std::fabs(a - b) < std::numeric_limits<double>::epsilon();
}
void DoTestHelper(int* argc, const char** argv, double expected) {
benchmark::Initialize(argc, const_cast<char**>(argv));
TestReporter test_reporter;
const size_t returned_count =
benchmark::RunSpecifiedBenchmarks(&test_reporter, "BM_MyBench");
assert(returned_count == 1);
// Check the min_time
const std::vector<double>& min_times = test_reporter.GetMinTimes();
assert(!min_times.empty() && AlmostEqual(min_times[0], expected));
}
} // end namespace
static void BM_MyBench(benchmark::State& state) {
for (auto s : state) {
}
}
BENCHMARK(BM_MyBench);
int main(int argc, char** argv) {
// Make a fake argv and append the new --benchmark_min_time=<foo> to it.
int fake_argc = argc + 1;
const char** fake_argv = new const char*[static_cast<size_t>(fake_argc)];
for (int i = 0; i < argc; ++i) fake_argv[i] = argv[i];
const char* no_suffix = "--benchmark_min_time=4";
const char* with_suffix = "--benchmark_min_time=4.0s";
double expected = 4.0;
fake_argv[argc] = no_suffix;
DoTestHelper(&fake_argc, fake_argv, expected);
fake_argv[argc] = with_suffix;
DoTestHelper(&fake_argc, fake_argv, expected);
delete[] fake_argv;
return 0;
}
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