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spec_arg_test.cc
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Wed, May 8, 19:00

spec_arg_test.cc
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#include <algorithm>
#include <cassert>
#include <cstdint>
#include <cstdlib>
#include <cstring>
#include <iostream>
#include <limits>
#include <string>
#include <vector>
#include "benchmark/benchmark.h"
// Tests that we can override benchmark-spec value from FLAGS_benchmark_filter
// with argument to RunSpecifiedBenchmarks(...).
namespace {
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);
matched_functions.push_back(report[0].run_name.function_name);
ConsoleReporter::ReportRuns(report);
};
TestReporter() {}
virtual ~TestReporter() {}
const std::vector<std::string>& GetMatchedFunctions() const {
return matched_functions;
}
private:
std::vector<std::string> matched_functions;
};
} // end namespace
static void BM_NotChosen(benchmark::State& state) {
assert(false && "SHOULD NOT BE CALLED");
for (auto _ : state) {
}
}
BENCHMARK(BM_NotChosen);
static void BM_Chosen(benchmark::State& state) {
for (auto _ : state) {
}
}
BENCHMARK(BM_Chosen);
int main(int argc, char** argv) {
const std::string flag = "BM_NotChosen";
// Verify that argv specify --benchmark_filter=BM_NotChosen.
bool found = false;
for (int i = 0; i < argc; ++i) {
if (strcmp("--benchmark_filter=BM_NotChosen", argv[i]) == 0) {
found = true;
break;
}
}
assert(found);
benchmark::Initialize(&argc, argv);
// Check that the current flag value is reported accurately via the
// GetBenchmarkFilter() function.
if (flag != benchmark::GetBenchmarkFilter()) {
std::cerr
<< "Seeing different value for flags. GetBenchmarkFilter() returns ["
<< benchmark::GetBenchmarkFilter() << "] expected flag=[" << flag
<< "]\n";
return 1;
}
TestReporter test_reporter;
const char* const spec = "BM_Chosen";
const size_t returned_count =
benchmark::RunSpecifiedBenchmarks(&test_reporter, spec);
assert(returned_count == 1);
const std::vector<std::string> matched_functions =
test_reporter.GetMatchedFunctions();
assert(matched_functions.size() == 1);
if (strcmp(spec, matched_functions.front().c_str()) != 0) {
std::cerr << "Expected benchmark [" << spec << "] to run, but got ["
<< matched_functions.front() << "]\n";
return 2;
}
// Test that SetBenchmarkFilter works.
const std::string golden_value = "golden_value";
benchmark::SetBenchmarkFilter(golden_value);
std::string current_value = benchmark::GetBenchmarkFilter();
if (golden_value != current_value) {
std::cerr << "Expected [" << golden_value
<< "] for --benchmark_filter but got [" << current_value << "]\n";
return 3;
}
return 0;
}

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