xref: /third_party/benchmark/test/reporter_output_test.cc

#undef NDEBUG
#include <numeric>
#include <utility>

#include "benchmark/benchmark.h"
#include "output_test.h"

// ========================================================================= //
// ---------------------- Testing Prologue Output -------------------------- //
// ========================================================================= //

ADD_CASES(TC_ConsoleOut, {{"^[-]+$", MR_Next},
                          {"^Benchmark %s Time %s CPU %s Iterations$", MR_Next},
                          {"^[-]+$", MR_Next}});
static int AddContextCases() {
  AddCases(TC_ConsoleErr,
           {
               {"^%int-%int-%intT%int:%int:%int[-+]%int:%int$", MR_Default},
               {"Running .*(/|\\\\)reporter_output_test(\\.exe)?$", MR_Next},
               {"Run on \\(%int X %float MHz CPU s?\\)", MR_Next},
           });
  AddCases(TC_JSONOut,
           {{"^\\{", MR_Default},
            {"\"context\":", MR_Next},
            {"\"date\": \"", MR_Next},
            {"\"host_name\":", MR_Next},
            {"\"executable\": \".*(/|\\\\)reporter_output_test(\\.exe)?\",",
             MR_Next},
            {"\"num_cpus\": %int,$", MR_Next},
            {"\"mhz_per_cpu\": %float,$", MR_Next},
            {"\"caches\": \\[$", MR_Default}});
  auto const& Info = benchmark::CPUInfo::Get();
  auto const& Caches = Info.caches;
  if (!Caches.empty()) {
    AddCases(TC_ConsoleErr, {{"CPU Caches:$", MR_Next}});
  }
  for (size_t I = 0; I < Caches.size(); ++I) {
    std::string num_caches_str =
        Caches[I].num_sharing != 0 ? " \\(x%int\\)$" : "$";
    AddCases(TC_ConsoleErr,
             {{"L%int (Data|Instruction|Unified) %int KiB" + num_caches_str,
               MR_Next}});
    AddCases(TC_JSONOut, {{"\\{$", MR_Next},
                          {"\"type\": \"", MR_Next},
                          {"\"level\": %int,$", MR_Next},
                          {"\"size\": %int,$", MR_Next},
                          {"\"num_sharing\": %int$", MR_Next},
                          {"}[,]{0,1}$", MR_Next}});
  }
  AddCases(TC_JSONOut, {{"],$"}});
  auto const& LoadAvg = Info.load_avg;
  if (!LoadAvg.empty()) {
    AddCases(TC_ConsoleErr,
             {{"Load Average: (%float, ){0,2}%float$", MR_Next}});
  }
  AddCases(TC_JSONOut, {{"\"load_avg\": \\[(%float,?){0,3}],$", MR_Next}});
  return 0;
}
int dummy_register = AddContextCases();
ADD_CASES(TC_CSVOut, {{"%csv_header"}});

// ========================================================================= //
// ------------------------ Testing Basic Output --------------------------- //
// ========================================================================= //

void BM_basic(benchmark::State& state) {
  for (auto _ : state) {
  }
}
BENCHMARK(BM_basic);

ADD_CASES(TC_ConsoleOut, {{"^BM_basic %console_report$"}});
ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_basic\",$"},
                       {"\"family_index\": 0,$", MR_Next},
                       {"\"per_family_instance_index\": 0,$", MR_Next},
                       {"\"run_name\": \"BM_basic\",$", MR_Next},
                       {"\"run_type\": \"iteration\",$", MR_Next},
                       {"\"repetitions\": 1,$", MR_Next},
                       {"\"repetition_index\": 0,$", MR_Next},
                       {"\"threads\": 1,$", MR_Next},
                       {"\"iterations\": %int,$", MR_Next},
                       {"\"real_time\": %float,$", MR_Next},
                       {"\"cpu_time\": %float,$", MR_Next},
                       {"\"time_unit\": \"ns\"$", MR_Next},
                       {"}", MR_Next}});
ADD_CASES(TC_CSVOut, {{"^\"BM_basic\",%csv_report$"}});

// ========================================================================= //
// ------------------------ Testing Bytes per Second Output ---------------- //
// ========================================================================= //

void BM_bytes_per_second(benchmark::State& state) {
  for (auto _ : state) {
    // This test requires a non-zero CPU time to avoid divide-by-zero
    auto iterations = state.iterations();
    benchmark::DoNotOptimize(iterations);
  }
  state.SetBytesProcessed(1);
}
BENCHMARK(BM_bytes_per_second);

ADD_CASES(TC_ConsoleOut, {{"^BM_bytes_per_second %console_report "
                           "bytes_per_second=%float[kM]{0,1}/s$"}});
ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_bytes_per_second\",$"},
                       {"\"family_index\": 1,$", MR_Next},
                       {"\"per_family_instance_index\": 0,$", MR_Next},
                       {"\"run_name\": \"BM_bytes_per_second\",$", MR_Next},
                       {"\"run_type\": \"iteration\",$", MR_Next},
                       {"\"repetitions\": 1,$", MR_Next},
                       {"\"repetition_index\": 0,$", MR_Next},
                       {"\"threads\": 1,$", MR_Next},
                       {"\"iterations\": %int,$", MR_Next},
                       {"\"real_time\": %float,$", MR_Next},
                       {"\"cpu_time\": %float,$", MR_Next},
                       {"\"time_unit\": \"ns\",$", MR_Next},
                       {"\"bytes_per_second\": %float$", MR_Next},
                       {"}", MR_Next}});
ADD_CASES(TC_CSVOut, {{"^\"BM_bytes_per_second\",%csv_bytes_report$"}});

// ========================================================================= //
// ------------------------ Testing Items per Second Output ---------------- //
// ========================================================================= //

void BM_items_per_second(benchmark::State& state) {
  for (auto _ : state) {
    // This test requires a non-zero CPU time to avoid divide-by-zero
    auto iterations = state.iterations();
    benchmark::DoNotOptimize(iterations);
  }
  state.SetItemsProcessed(1);
}
BENCHMARK(BM_items_per_second);

ADD_CASES(TC_ConsoleOut, {{"^BM_items_per_second %console_report "
                           "items_per_second=%float[kM]{0,1}/s$"}});
ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_items_per_second\",$"},
                       {"\"family_index\": 2,$", MR_Next},
                       {"\"per_family_instance_index\": 0,$", MR_Next},
                       {"\"run_name\": \"BM_items_per_second\",$", MR_Next},
                       {"\"run_type\": \"iteration\",$", MR_Next},
                       {"\"repetitions\": 1,$", MR_Next},
                       {"\"repetition_index\": 0,$", MR_Next},
                       {"\"threads\": 1,$", MR_Next},
                       {"\"iterations\": %int,$", MR_Next},
                       {"\"real_time\": %float,$", MR_Next},
                       {"\"cpu_time\": %float,$", MR_Next},
                       {"\"time_unit\": \"ns\",$", MR_Next},
                       {"\"items_per_second\": %float$", MR_Next},
                       {"}", MR_Next}});
ADD_CASES(TC_CSVOut, {{"^\"BM_items_per_second\",%csv_items_report$"}});

// ========================================================================= //
// ------------------------ Testing Label Output --------------------------- //
// ========================================================================= //

void BM_label(benchmark::State& state) {
  for (auto _ : state) {
  }
  state.SetLabel("some label");
}
BENCHMARK(BM_label);

ADD_CASES(TC_ConsoleOut, {{"^BM_label %console_report some label$"}});
ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_label\",$"},
                       {"\"family_index\": 3,$", MR_Next},
                       {"\"per_family_instance_index\": 0,$", MR_Next},
                       {"\"run_name\": \"BM_label\",$", MR_Next},
                       {"\"run_type\": \"iteration\",$", MR_Next},
                       {"\"repetitions\": 1,$", MR_Next},
                       {"\"repetition_index\": 0,$", MR_Next},
                       {"\"threads\": 1,$", MR_Next},
                       {"\"iterations\": %int,$", MR_Next},
                       {"\"real_time\": %float,$", MR_Next},
                       {"\"cpu_time\": %float,$", MR_Next},
                       {"\"time_unit\": \"ns\",$", MR_Next},
                       {"\"label\": \"some label\"$", MR_Next},
                       {"}", MR_Next}});
ADD_CASES(TC_CSVOut, {{"^\"BM_label\",%csv_label_report_begin\"some "
                       "label\"%csv_label_report_end$"}});

// ========================================================================= //
// ------------------------ Testing Time Label Output ---------------------- //
// ========================================================================= //

void BM_time_label_nanosecond(benchmark::State& state) {
  for (auto _ : state) {
  }
}
BENCHMARK(BM_time_label_nanosecond)->Unit(benchmark::kNanosecond);

ADD_CASES(TC_ConsoleOut, {{"^BM_time_label_nanosecond %console_report$"}});
ADD_CASES(TC_JSONOut,
          {{"\"name\": \"BM_time_label_nanosecond\",$"},
           {"\"family_index\": 4,$", MR_Next},
           {"\"per_family_instance_index\": 0,$", MR_Next},
           {"\"run_name\": \"BM_time_label_nanosecond\",$", MR_Next},
           {"\"run_type\": \"iteration\",$", MR_Next},
           {"\"repetitions\": 1,$", MR_Next},
           {"\"repetition_index\": 0,$", MR_Next},
           {"\"threads\": 1,$", MR_Next},
           {"\"iterations\": %int,$", MR_Next},
           {"\"real_time\": %float,$", MR_Next},
           {"\"cpu_time\": %float,$", MR_Next},
           {"\"time_unit\": \"ns\"$", MR_Next},
           {"}", MR_Next}});
ADD_CASES(TC_CSVOut, {{"^\"BM_time_label_nanosecond\",%csv_report$"}});

void BM_time_label_microsecond(benchmark::State& state) {
  for (auto _ : state) {
  }
}
BENCHMARK(BM_time_label_microsecond)->Unit(benchmark::kMicrosecond);

ADD_CASES(TC_ConsoleOut, {{"^BM_time_label_microsecond %console_us_report$"}});
ADD_CASES(TC_JSONOut,
          {{"\"name\": \"BM_time_label_microsecond\",$"},
           {"\"family_index\": 5,$", MR_Next},
           {"\"per_family_instance_index\": 0,$", MR_Next},
           {"\"run_name\": \"BM_time_label_microsecond\",$", MR_Next},
           {"\"run_type\": \"iteration\",$", MR_Next},
           {"\"repetitions\": 1,$", MR_Next},
           {"\"repetition_index\": 0,$", MR_Next},
           {"\"threads\": 1,$", MR_Next},
           {"\"iterations\": %int,$", MR_Next},
           {"\"real_time\": %float,$", MR_Next},
           {"\"cpu_time\": %float,$", MR_Next},
           {"\"time_unit\": \"us\"$", MR_Next},
           {"}", MR_Next}});
ADD_CASES(TC_CSVOut, {{"^\"BM_time_label_microsecond\",%csv_us_report$"}});

void BM_time_label_millisecond(benchmark::State& state) {
  for (auto _ : state) {
  }
}
BENCHMARK(BM_time_label_millisecond)->Unit(benchmark::kMillisecond);

ADD_CASES(TC_ConsoleOut, {{"^BM_time_label_millisecond %console_ms_report$"}});
ADD_CASES(TC_JSONOut,
          {{"\"name\": \"BM_time_label_millisecond\",$"},
           {"\"family_index\": 6,$", MR_Next},
           {"\"per_family_instance_index\": 0,$", MR_Next},
           {"\"run_name\": \"BM_time_label_millisecond\",$", MR_Next},
           {"\"run_type\": \"iteration\",$", MR_Next},
           {"\"repetitions\": 1,$", MR_Next},
           {"\"repetition_index\": 0,$", MR_Next},
           {"\"threads\": 1,$", MR_Next},
           {"\"iterations\": %int,$", MR_Next},
           {"\"real_time\": %float,$", MR_Next},
           {"\"cpu_time\": %float,$", MR_Next},
           {"\"time_unit\": \"ms\"$", MR_Next},
           {"}", MR_Next}});
ADD_CASES(TC_CSVOut, {{"^\"BM_time_label_millisecond\",%csv_ms_report$"}});

void BM_time_label_second(benchmark::State& state) {
  for (auto _ : state) {
  }
}
BENCHMARK(BM_time_label_second)->Unit(benchmark::kSecond);

ADD_CASES(TC_ConsoleOut, {{"^BM_time_label_second %console_s_report$"}});
ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_time_label_second\",$"},
                       {"\"family_index\": 7,$", MR_Next},
                       {"\"per_family_instance_index\": 0,$", MR_Next},
                       {"\"run_name\": \"BM_time_label_second\",$", MR_Next},
                       {"\"run_type\": \"iteration\",$", MR_Next},
                       {"\"repetitions\": 1,$", MR_Next},
                       {"\"repetition_index\": 0,$", MR_Next},
                       {"\"threads\": 1,$", MR_Next},
                       {"\"iterations\": %int,$", MR_Next},
                       {"\"real_time\": %float,$", MR_Next},
                       {"\"cpu_time\": %float,$", MR_Next},
                       {"\"time_unit\": \"s\"$", MR_Next},
                       {"}", MR_Next}});
ADD_CASES(TC_CSVOut, {{"^\"BM_time_label_second\",%csv_s_report$"}});

// ========================================================================= //
// ------------------------ Testing Error Output --------------------------- //
// ========================================================================= //

void BM_error(benchmark::State& state) {
  state.SkipWithError("message");
  for (auto _ : state) {
  }
}
BENCHMARK(BM_error);
ADD_CASES(TC_ConsoleOut, {{"^BM_error[ ]+ERROR OCCURRED: 'message'$"}});
ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_error\",$"},
                       {"\"family_index\": 8,$", MR_Next},
                       {"\"per_family_instance_index\": 0,$", MR_Next},
                       {"\"run_name\": \"BM_error\",$", MR_Next},
                       {"\"run_type\": \"iteration\",$", MR_Next},
                       {"\"repetitions\": 1,$", MR_Next},
                       {"\"repetition_index\": 0,$", MR_Next},
                       {"\"threads\": 1,$", MR_Next},
                       {"\"error_occurred\": true,$", MR_Next},
                       {"\"error_message\": \"message\",$", MR_Next}});

ADD_CASES(TC_CSVOut, {{"^\"BM_error\",,,,,,,,true,\"message\"$"}});

// ========================================================================= //
// ------------------------ Testing No Arg Name Output -----------------------
// //
// ========================================================================= //

void BM_no_arg_name(benchmark::State& state) {
  for (auto _ : state) {
  }
}
BENCHMARK(BM_no_arg_name)->Arg(3);
ADD_CASES(TC_ConsoleOut, {{"^BM_no_arg_name/3 %console_report$"}});
ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_no_arg_name/3\",$"},
                       {"\"family_index\": 9,$", MR_Next},
                       {"\"per_family_instance_index\": 0,$", MR_Next},
                       {"\"run_name\": \"BM_no_arg_name/3\",$", MR_Next},
                       {"\"run_type\": \"iteration\",$", MR_Next},
                       {"\"repetitions\": 1,$", MR_Next},
                       {"\"repetition_index\": 0,$", MR_Next},
                       {"\"threads\": 1,$", MR_Next}});
ADD_CASES(TC_CSVOut, {{"^\"BM_no_arg_name/3\",%csv_report$"}});

// ========================================================================= //
// ------------------------ Testing Arg Name Output ------------------------ //
// ========================================================================= //

void BM_arg_name(benchmark::State& state) {
  for (auto _ : state) {
  }
}
BENCHMARK(BM_arg_name)->ArgName("first")->Arg(3);
ADD_CASES(TC_ConsoleOut, {{"^BM_arg_name/first:3 %console_report$"}});
ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_arg_name/first:3\",$"},
                       {"\"family_index\": 10,$", MR_Next},
                       {"\"per_family_instance_index\": 0,$", MR_Next},
                       {"\"run_name\": \"BM_arg_name/first:3\",$", MR_Next},
                       {"\"run_type\": \"iteration\",$", MR_Next},
                       {"\"repetitions\": 1,$", MR_Next},
                       {"\"repetition_index\": 0,$", MR_Next},
                       {"\"threads\": 1,$", MR_Next}});
ADD_CASES(TC_CSVOut, {{"^\"BM_arg_name/first:3\",%csv_report$"}});

// ========================================================================= //
// ------------------------ Testing Arg Names Output ----------------------- //
// ========================================================================= //

void BM_arg_names(benchmark::State& state) {
  for (auto _ : state) {
  }
}
BENCHMARK(BM_arg_names)->Args({2, 5, 4})->ArgNames({"first", "", "third"});
ADD_CASES(TC_ConsoleOut,
          {{"^BM_arg_names/first:2/5/third:4 %console_report$"}});
ADD_CASES(TC_JSONOut,
          {{"\"name\": \"BM_arg_names/first:2/5/third:4\",$"},
           {"\"family_index\": 11,$", MR_Next},
           {"\"per_family_instance_index\": 0,$", MR_Next},
           {"\"run_name\": \"BM_arg_names/first:2/5/third:4\",$", MR_Next},
           {"\"run_type\": \"iteration\",$", MR_Next},
           {"\"repetitions\": 1,$", MR_Next},
           {"\"repetition_index\": 0,$", MR_Next},
           {"\"threads\": 1,$", MR_Next}});
ADD_CASES(TC_CSVOut, {{"^\"BM_arg_names/first:2/5/third:4\",%csv_report$"}});

// ========================================================================= //
// ------------------------ Testing Name Output ---------------------------- //
// ========================================================================= //

void BM_name(benchmark::State& state) {
  for (auto _ : state) {
  }
}
BENCHMARK(BM_name)->Name("BM_custom_name");

ADD_CASES(TC_ConsoleOut, {{"^BM_custom_name %console_report$"}});
ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_custom_name\",$"},
                       {"\"family_index\": 12,$", MR_Next},
                       {"\"per_family_instance_index\": 0,$", MR_Next},
                       {"\"run_name\": \"BM_custom_name\",$", MR_Next},
                       {"\"run_type\": \"iteration\",$", MR_Next},
                       {"\"repetitions\": 1,$", MR_Next},
                       {"\"repetition_index\": 0,$", MR_Next},
                       {"\"threads\": 1,$", MR_Next},
                       {"\"iterations\": %int,$", MR_Next},
                       {"\"real_time\": %float,$", MR_Next},
                       {"\"cpu_time\": %float,$", MR_Next},
                       {"\"time_unit\": \"ns\"$", MR_Next},
                       {"}", MR_Next}});
ADD_CASES(TC_CSVOut, {{"^\"BM_custom_name\",%csv_report$"}});

// ========================================================================= //
// ------------------------ Testing Big Args Output ------------------------ //
// ========================================================================= //

void BM_BigArgs(benchmark::State& state) {
  for (auto _ : state) {
  }
}
BENCHMARK(BM_BigArgs)->RangeMultiplier(2)->Range(1U << 30U, 1U << 31U);
ADD_CASES(TC_ConsoleOut, {{"^BM_BigArgs/1073741824 %console_report$"},
                          {"^BM_BigArgs/2147483648 %console_report$"}});

// ========================================================================= //
// ----------------------- Testing Complexity Output ----------------------- //
// ========================================================================= //

void BM_Complexity_O1(benchmark::State& state) {
  for (auto _ : state) {
    // This test requires a non-zero CPU time to avoid divide-by-zero
    auto iterations = state.iterations();
    benchmark::DoNotOptimize(iterations);
  }
  state.SetComplexityN(state.range(0));
}
BENCHMARK(BM_Complexity_O1)->Range(1, 1 << 18)->Complexity(benchmark::o1);
SET_SUBSTITUTIONS({{"%bigOStr", "[ ]* %float \\([0-9]+\\)"},
                   {"%RMS", "[ ]*[0-9]+ %"}});
ADD_CASES(TC_ConsoleOut, {{"^BM_Complexity_O1_BigO %bigOStr %bigOStr[ ]*$"},
                          {"^BM_Complexity_O1_RMS %RMS %RMS[ ]*$"}});

// ========================================================================= //
// ----------------------- Testing Aggregate Output ------------------------ //
// ========================================================================= //

// Test that non-aggregate data is printed by default
void BM_Repeat(benchmark::State& state) {
  for (auto _ : state) {
  }
}
// need two repetitions min to be able to output any aggregate output
BENCHMARK(BM_Repeat)->Repetitions(2);
ADD_CASES(TC_ConsoleOut,
          {{"^BM_Repeat/repeats:2 %console_report$"},
           {"^BM_Repeat/repeats:2 %console_report$"},
           {"^BM_Repeat/repeats:2_mean %console_time_only_report [ ]*2$"},
           {"^BM_Repeat/repeats:2_median %console_time_only_report [ ]*2$"},
           {"^BM_Repeat/repeats:2_stddev %console_time_only_report [ ]*2$"}});
ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_Repeat/repeats:2\",$"},
                       {"\"family_index\": 15,$", MR_Next},
                       {"\"per_family_instance_index\": 0,$", MR_Next},
                       {"\"run_name\": \"BM_Repeat/repeats:2\"", MR_Next},
                       {"\"run_type\": \"iteration\",$", MR_Next},
                       {"\"repetitions\": 2,$", MR_Next},
                       {"\"repetition_index\": 0,$", MR_Next},
                       {"\"threads\": 1,$", MR_Next},
                       {"\"name\": \"BM_Repeat/repeats:2\",$"},
                       {"\"family_index\": 15,$", MR_Next},
                       {"\"per_family_instance_index\": 0,$", MR_Next},
                       {"\"run_name\": \"BM_Repeat/repeats:2\",$", MR_Next},
                       {"\"run_type\": \"iteration\",$", MR_Next},
                       {"\"repetitions\": 2,$", MR_Next},
                       {"\"repetition_index\": 1,$", MR_Next},
                       {"\"threads\": 1,$", MR_Next},
                       {"\"name\": \"BM_Repeat/repeats:2_mean\",$"},
                       {"\"family_index\": 15,$", MR_Next},
                       {"\"per_family_instance_index\": 0,$", MR_Next},
                       {"\"run_name\": \"BM_Repeat/repeats:2\",$", MR_Next},
                       {"\"run_type\": \"aggregate\",$", MR_Next},
                       {"\"repetitions\": 2,$", MR_Next},
                       {"\"threads\": 1,$", MR_Next},
                       {"\"aggregate_name\": \"mean\",$", MR_Next},
                       {"\"aggregate_unit\": \"time\",$", MR_Next},
                       {"\"iterations\": 2,$", MR_Next},
                       {"\"name\": \"BM_Repeat/repeats:2_median\",$"},
                       {"\"family_index\": 15,$", MR_Next},
                       {"\"per_family_instance_index\": 0,$", MR_Next},
                       {"\"run_name\": \"BM_Repeat/repeats:2\",$", MR_Next},
                       {"\"run_type\": \"aggregate\",$", MR_Next},
                       {"\"repetitions\": 2,$", MR_Next},
                       {"\"threads\": 1,$", MR_Next},
                       {"\"aggregate_name\": \"median\",$", MR_Next},
                       {"\"aggregate_unit\": \"time\",$", MR_Next},
                       {"\"iterations\": 2,$", MR_Next},
                       {"\"name\": \"BM_Repeat/repeats:2_stddev\",$"},
                       {"\"family_index\": 15,$", MR_Next},
                       {"\"per_family_instance_index\": 0,$", MR_Next},
                       {"\"run_name\": \"BM_Repeat/repeats:2\",$", MR_Next},
                       {"\"run_type\": \"aggregate\",$", MR_Next},
                       {"\"repetitions\": 2,$", MR_Next},
                       {"\"threads\": 1,$", MR_Next},
                       {"\"aggregate_name\": \"stddev\",$", MR_Next},
                       {"\"aggregate_unit\": \"time\",$", MR_Next},
                       {"\"iterations\": 2,$", MR_Next}});
ADD_CASES(TC_CSVOut, {{"^\"BM_Repeat/repeats:2\",%csv_report$"},
                      {"^\"BM_Repeat/repeats:2\",%csv_report$"},
                      {"^\"BM_Repeat/repeats:2_mean\",%csv_report$"},
                      {"^\"BM_Repeat/repeats:2_median\",%csv_report$"},
                      {"^\"BM_Repeat/repeats:2_stddev\",%csv_report$"}});
// but for two repetitions, mean and median is the same, so let's repeat..
BENCHMARK(BM_Repeat)->Repetitions(3);
ADD_CASES(TC_ConsoleOut,
          {{"^BM_Repeat/repeats:3 %console_report$"},
           {"^BM_Repeat/repeats:3 %console_report$"},
           {"^BM_Repeat/repeats:3 %console_report$"},
           {"^BM_Repeat/repeats:3_mean %console_time_only_report [ ]*3$"},
           {"^BM_Repeat/repeats:3_median %console_time_only_report [ ]*3$"},
           {"^BM_Repeat/repeats:3_stddev %console_time_only_report [ ]*3$"}});
ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_Repeat/repeats:3\",$"},
                       {"\"family_index\": 16,$", MR_Next},
                       {"\"per_family_instance_index\": 0,$", MR_Next},
                       {"\"run_name\": \"BM_Repeat/repeats:3\",$", MR_Next},
                       {"\"run_type\": \"iteration\",$", MR_Next},
                       {"\"repetitions\": 3,$", MR_Next},
                       {"\"repetition_index\": 0,$", MR_Next},
                       {"\"threads\": 1,$", MR_Next},
                       {"\"name\": \"BM_Repeat/repeats:3\",$"},
                       {"\"family_index\": 16,$", MR_Next},
                       {"\"per_family_instance_index\": 0,$", MR_Next},
                       {"\"run_name\": \"BM_Repeat/repeats:3\",$", MR_Next},
                       {"\"run_type\": \"iteration\",$", MR_Next},
                       {"\"repetitions\": 3,$", MR_Next},
                       {"\"repetition_index\": 1,$", MR_Next},
                       {"\"threads\": 1,$", MR_Next},
                       {"\"name\": \"BM_Repeat/repeats:3\",$"},
                       {"\"family_index\": 16,$", MR_Next},
                       {"\"per_family_instance_index\": 0,$", MR_Next},
                       {"\"run_name\": \"BM_Repeat/repeats:3\",$", MR_Next},
                       {"\"run_type\": \"iteration\",$", MR_Next},
                       {"\"repetitions\": 3,$", MR_Next},
                       {"\"repetition_index\": 2,$", MR_Next},
                       {"\"threads\": 1,$", MR_Next},
                       {"\"name\": \"BM_Repeat/repeats:3_mean\",$"},
                       {"\"family_index\": 16,$", MR_Next},
                       {"\"per_family_instance_index\": 0,$", MR_Next},
                       {"\"run_name\": \"BM_Repeat/repeats:3\",$", MR_Next},
                       {"\"run_type\": \"aggregate\",$", MR_Next},
                       {"\"repetitions\": 3,$", MR_Next},
                       {"\"threads\": 1,$", MR_Next},
                       {"\"aggregate_name\": \"mean\",$", MR_Next},
                       {"\"aggregate_unit\": \"time\",$", MR_Next},
                       {"\"iterations\": 3,$", MR_Next},
                       {"\"name\": \"BM_Repeat/repeats:3_median\",$"},
                       {"\"family_index\": 16,$", MR_Next},
                       {"\"per_family_instance_index\": 0,$", MR_Next},
                       {"\"run_name\": \"BM_Repeat/repeats:3\",$", MR_Next},
                       {"\"run_type\": \"aggregate\",$", MR_Next},
                       {"\"repetitions\": 3,$", MR_Next},
                       {"\"threads\": 1,$", MR_Next},
                       {"\"aggregate_name\": \"median\",$", MR_Next},
                       {"\"aggregate_unit\": \"time\",$", MR_Next},
                       {"\"iterations\": 3,$", MR_Next},
                       {"\"name\": \"BM_Repeat/repeats:3_stddev\",$"},
                       {"\"family_index\": 16,$", MR_Next},
                       {"\"per_family_instance_index\": 0,$", MR_Next},
                       {"\"run_name\": \"BM_Repeat/repeats:3\",$", MR_Next},
                       {"\"run_type\": \"aggregate\",$", MR_Next},
                       {"\"repetitions\": 3,$", MR_Next},
                       {"\"threads\": 1,$", MR_Next},
                       {"\"aggregate_name\": \"stddev\",$", MR_Next},
                       {"\"aggregate_unit\": \"time\",$", MR_Next},
                       {"\"iterations\": 3,$", MR_Next}});
ADD_CASES(TC_CSVOut, {{"^\"BM_Repeat/repeats:3\",%csv_report$"},
                      {"^\"BM_Repeat/repeats:3\",%csv_report$"},
                      {"^\"BM_Repeat/repeats:3\",%csv_report$"},
                      {"^\"BM_Repeat/repeats:3_mean\",%csv_report$"},
                      {"^\"BM_Repeat/repeats:3_median\",%csv_report$"},
                      {"^\"BM_Repeat/repeats:3_stddev\",%csv_report$"}});
// median differs between even/odd number of repetitions, so just to be sure
BENCHMARK(BM_Repeat)->Repetitions(4);
ADD_CASES(TC_ConsoleOut,
          {{"^BM_Repeat/repeats:4 %console_report$"},
           {"^BM_Repeat/repeats:4 %console_report$"},
           {"^BM_Repeat/repeats:4 %console_report$"},
           {"^BM_Repeat/repeats:4 %console_report$"},
           {"^BM_Repeat/repeats:4_mean %console_time_only_report [ ]*4$"},
           {"^BM_Repeat/repeats:4_median %console_time_only_report [ ]*4$"},
           {"^BM_Repeat/repeats:4_stddev %console_time_only_report [ ]*4$"}});
ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_Repeat/repeats:4\",$"},
                       {"\"family_index\": 17,$", MR_Next},
                       {"\"per_family_instance_index\": 0,$", MR_Next},
                       {"\"run_name\": \"BM_Repeat/repeats:4\",$", MR_Next},
                       {"\"run_type\": \"iteration\",$", MR_Next},
                       {"\"repetitions\": 4,$", MR_Next},
                       {"\"repetition_index\": 0,$", MR_Next},
                       {"\"threads\": 1,$", MR_Next},
                       {"\"name\": \"BM_Repeat/repeats:4\",$"},
                       {"\"family_index\": 17,$", MR_Next},
                       {"\"per_family_instance_index\": 0,$", MR_Next},
                       {"\"run_name\": \"BM_Repeat/repeats:4\",$", MR_Next},
                       {"\"run_type\": \"iteration\",$", MR_Next},
                       {"\"repetitions\": 4,$", MR_Next},
                       {"\"repetition_index\": 1,$", MR_Next},
                       {"\"threads\": 1,$", MR_Next},
                       {"\"name\": \"BM_Repeat/repeats:4\",$"},
                       {"\"family_index\": 17,$", MR_Next},
                       {"\"per_family_instance_index\": 0,$", MR_Next},
                       {"\"run_name\": \"BM_Repeat/repeats:4\",$", MR_Next},
                       {"\"run_type\": \"iteration\",$", MR_Next},
                       {"\"repetitions\": 4,$", MR_Next},
                       {"\"repetition_index\": 2,$", MR_Next},
                       {"\"threads\": 1,$", MR_Next},
                       {"\"name\": \"BM_Repeat/repeats:4\",$"},
                       {"\"family_index\": 17,$", MR_Next},
                       {"\"per_family_instance_index\": 0,$", MR_Next},
                       {"\"run_name\": \"BM_Repeat/repeats:4\",$", MR_Next},
                       {"\"run_type\": \"iteration\",$", MR_Next},
                       {"\"repetitions\": 4,$", MR_Next},
                       {"\"repetition_index\": 3,$", MR_Next},
                       {"\"threads\": 1,$", MR_Next},
                       {"\"name\": \"BM_Repeat/repeats:4_mean\",$"},
                       {"\"family_index\": 17,$", MR_Next},
                       {"\"per_family_instance_index\": 0,$", MR_Next},
                       {"\"run_name\": \"BM_Repeat/repeats:4\",$", MR_Next},
                       {"\"run_type\": \"aggregate\",$", MR_Next},
                       {"\"repetitions\": 4,$", MR_Next},
                       {"\"threads\": 1,$", MR_Next},
                       {"\"aggregate_name\": \"mean\",$", MR_Next},
                       {"\"aggregate_unit\": \"time\",$", MR_Next},
                       {"\"iterations\": 4,$", MR_Next},
                       {"\"name\": \"BM_Repeat/repeats:4_median\",$"},
                       {"\"family_index\": 17,$", MR_Next},
                       {"\"per_family_instance_index\": 0,$", MR_Next},
                       {"\"run_name\": \"BM_Repeat/repeats:4\",$", MR_Next},
                       {"\"run_type\": \"aggregate\",$", MR_Next},
                       {"\"repetitions\": 4,$", MR_Next},
                       {"\"threads\": 1,$", MR_Next},
                       {"\"aggregate_name\": \"median\",$", MR_Next},
                       {"\"aggregate_unit\": \"time\",$", MR_Next},
                       {"\"iterations\": 4,$", MR_Next},
                       {"\"name\": \"BM_Repeat/repeats:4_stddev\",$"},
                       {"\"family_index\": 17,$", MR_Next},
                       {"\"per_family_instance_index\": 0,$", MR_Next},
                       {"\"run_name\": \"BM_Repeat/repeats:4\",$", MR_Next},
                       {"\"run_type\": \"aggregate\",$", MR_Next},
                       {"\"repetitions\": 4,$", MR_Next},
                       {"\"threads\": 1,$", MR_Next},
                       {"\"aggregate_name\": \"stddev\",$", MR_Next},
                       {"\"aggregate_unit\": \"time\",$", MR_Next},
                       {"\"iterations\": 4,$", MR_Next}});
ADD_CASES(TC_CSVOut, {{"^\"BM_Repeat/repeats:4\",%csv_report$"},
                      {"^\"BM_Repeat/repeats:4\",%csv_report$"},
                      {"^\"BM_Repeat/repeats:4\",%csv_report$"},
                      {"^\"BM_Repeat/repeats:4\",%csv_report$"},
                      {"^\"BM_Repeat/repeats:4_mean\",%csv_report$"},
                      {"^\"BM_Repeat/repeats:4_median\",%csv_report$"},
                      {"^\"BM_Repeat/repeats:4_stddev\",%csv_report$"}});

// Test that a non-repeated test still prints non-aggregate results even when
// only-aggregate reports have been requested
void BM_RepeatOnce(benchmark::State& state) {
  for (auto _ : state) {
  }
}
BENCHMARK(BM_RepeatOnce)->Repetitions(1)->ReportAggregatesOnly();
ADD_CASES(TC_ConsoleOut, {{"^BM_RepeatOnce/repeats:1 %console_report$"}});
ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_RepeatOnce/repeats:1\",$"},
                       {"\"family_index\": 18,$", MR_Next},
                       {"\"per_family_instance_index\": 0,$", MR_Next},
                       {"\"run_name\": \"BM_RepeatOnce/repeats:1\",$", MR_Next},
                       {"\"run_type\": \"iteration\",$", MR_Next},
                       {"\"repetitions\": 1,$", MR_Next},
                       {"\"repetition_index\": 0,$", MR_Next},
                       {"\"threads\": 1,$", MR_Next}});
ADD_CASES(TC_CSVOut, {{"^\"BM_RepeatOnce/repeats:1\",%csv_report$"}});

// Test that non-aggregate data is not reported
void BM_SummaryRepeat(benchmark::State& state) {
  for (auto _ : state) {
  }
}
BENCHMARK(BM_SummaryRepeat)->Repetitions(3)->ReportAggregatesOnly();
ADD_CASES(
    TC_ConsoleOut,
    {{".*BM_SummaryRepeat/repeats:3 ", MR_Not},
     {"^BM_SummaryRepeat/repeats:3_mean %console_time_only_report [ ]*3$"},
     {"^BM_SummaryRepeat/repeats:3_median %console_time_only_report [ ]*3$"},
     {"^BM_SummaryRepeat/repeats:3_stddev %console_time_only_report [ ]*3$"}});
ADD_CASES(TC_JSONOut,
          {{".*BM_SummaryRepeat/repeats:3 ", MR_Not},
           {"\"name\": \"BM_SummaryRepeat/repeats:3_mean\",$"},
           {"\"family_index\": 19,$", MR_Next},
           {"\"per_family_instance_index\": 0,$", MR_Next},
           {"\"run_name\": \"BM_SummaryRepeat/repeats:3\",$", MR_Next},
           {"\"run_type\": \"aggregate\",$", MR_Next},
           {"\"repetitions\": 3,$", MR_Next},
           {"\"threads\": 1,$", MR_Next},
           {"\"aggregate_name\": \"mean\",$", MR_Next},
           {"\"aggregate_unit\": \"time\",$", MR_Next},
           {"\"iterations\": 3,$", MR_Next},
           {"\"name\": \"BM_SummaryRepeat/repeats:3_median\",$"},
           {"\"family_index\": 19,$", MR_Next},
           {"\"per_family_instance_index\": 0,$", MR_Next},
           {"\"run_name\": \"BM_SummaryRepeat/repeats:3\",$", MR_Next},
           {"\"run_type\": \"aggregate\",$", MR_Next},
           {"\"repetitions\": 3,$", MR_Next},
           {"\"threads\": 1,$", MR_Next},
           {"\"aggregate_name\": \"median\",$", MR_Next},
           {"\"aggregate_unit\": \"time\",$", MR_Next},
           {"\"iterations\": 3,$", MR_Next},
           {"\"name\": \"BM_SummaryRepeat/repeats:3_stddev\",$"},
           {"\"family_index\": 19,$", MR_Next},
           {"\"per_family_instance_index\": 0,$", MR_Next},
           {"\"run_name\": \"BM_SummaryRepeat/repeats:3\",$", MR_Next},
           {"\"run_type\": \"aggregate\",$", MR_Next},
           {"\"repetitions\": 3,$", MR_Next},
           {"\"threads\": 1,$", MR_Next},
           {"\"aggregate_name\": \"stddev\",$", MR_Next},
           {"\"aggregate_unit\": \"time\",$", MR_Next},
           {"\"iterations\": 3,$", MR_Next}});
ADD_CASES(TC_CSVOut, {{".*BM_SummaryRepeat/repeats:3 ", MR_Not},
                      {"^\"BM_SummaryRepeat/repeats:3_mean\",%csv_report$"},
                      {"^\"BM_SummaryRepeat/repeats:3_median\",%csv_report$"},
                      {"^\"BM_SummaryRepeat/repeats:3_stddev\",%csv_report$"}});

// Test that non-aggregate data is not displayed.
// NOTE: this test is kinda bad. we are only testing the display output.
//       But we don't check that the file output still contains everything...
void BM_SummaryDisplay(benchmark::State& state) {
  for (auto _ : state) {
  }
}
BENCHMARK(BM_SummaryDisplay)->Repetitions(2)->DisplayAggregatesOnly();
ADD_CASES(
    TC_ConsoleOut,
    {{".*BM_SummaryDisplay/repeats:2 ", MR_Not},
     {"^BM_SummaryDisplay/repeats:2_mean %console_time_only_report [ ]*2$"},
     {"^BM_SummaryDisplay/repeats:2_median %console_time_only_report [ ]*2$"},
     {"^BM_SummaryDisplay/repeats:2_stddev %console_time_only_report [ ]*2$"}});
ADD_CASES(TC_JSONOut,
          {{".*BM_SummaryDisplay/repeats:2 ", MR_Not},
           {"\"name\": \"BM_SummaryDisplay/repeats:2_mean\",$"},
           {"\"family_index\": 20,$", MR_Next},
           {"\"per_family_instance_index\": 0,$", MR_Next},
           {"\"run_name\": \"BM_SummaryDisplay/repeats:2\",$", MR_Next},
           {"\"run_type\": \"aggregate\",$", MR_Next},
           {"\"repetitions\": 2,$", MR_Next},
           {"\"threads\": 1,$", MR_Next},
           {"\"aggregate_name\": \"mean\",$", MR_Next},
           {"\"aggregate_unit\": \"time\",$", MR_Next},
           {"\"iterations\": 2,$", MR_Next},
           {"\"name\": \"BM_SummaryDisplay/repeats:2_median\",$"},
           {"\"family_index\": 20,$", MR_Next},
           {"\"per_family_instance_index\": 0,$", MR_Next},
           {"\"run_name\": \"BM_SummaryDisplay/repeats:2\",$", MR_Next},
           {"\"run_type\": \"aggregate\",$", MR_Next},
           {"\"repetitions\": 2,$", MR_Next},
           {"\"threads\": 1,$", MR_Next},
           {"\"aggregate_name\": \"median\",$", MR_Next},
           {"\"aggregate_unit\": \"time\",$", MR_Next},
           {"\"iterations\": 2,$", MR_Next},
           {"\"name\": \"BM_SummaryDisplay/repeats:2_stddev\",$"},
           {"\"family_index\": 20,$", MR_Next},
           {"\"per_family_instance_index\": 0,$", MR_Next},
           {"\"run_name\": \"BM_SummaryDisplay/repeats:2\",$", MR_Next},
           {"\"run_type\": \"aggregate\",$", MR_Next},
           {"\"repetitions\": 2,$", MR_Next},
           {"\"threads\": 1,$", MR_Next},
           {"\"aggregate_name\": \"stddev\",$", MR_Next},
           {"\"aggregate_unit\": \"time\",$", MR_Next},
           {"\"iterations\": 2,$", MR_Next}});
ADD_CASES(TC_CSVOut,
          {{".*BM_SummaryDisplay/repeats:2 ", MR_Not},
           {"^\"BM_SummaryDisplay/repeats:2_mean\",%csv_report$"},
           {"^\"BM_SummaryDisplay/repeats:2_median\",%csv_report$"},
           {"^\"BM_SummaryDisplay/repeats:2_stddev\",%csv_report$"}});

// Test repeats with custom time unit.
void BM_RepeatTimeUnit(benchmark::State& state) {
  for (auto _ : state) {
  }
}
BENCHMARK(BM_RepeatTimeUnit)
    ->Repetitions(3)
    ->ReportAggregatesOnly()
    ->Unit(benchmark::kMicrosecond);
ADD_CASES(
    TC_ConsoleOut,
    {{".*BM_RepeatTimeUnit/repeats:3 ", MR_Not},
     {"^BM_RepeatTimeUnit/repeats:3_mean %console_us_time_only_report [ ]*3$"},
     {"^BM_RepeatTimeUnit/repeats:3_median %console_us_time_only_report [ "
      "]*3$"},
     {"^BM_RepeatTimeUnit/repeats:3_stddev %console_us_time_only_report [ "
      "]*3$"}});
ADD_CASES(TC_JSONOut,
          {{".*BM_RepeatTimeUnit/repeats:3 ", MR_Not},
           {"\"name\": \"BM_RepeatTimeUnit/repeats:3_mean\",$"},
           {"\"family_index\": 21,$", MR_Next},
           {"\"per_family_instance_index\": 0,$", MR_Next},
           {"\"run_name\": \"BM_RepeatTimeUnit/repeats:3\",$", MR_Next},
           {"\"run_type\": \"aggregate\",$", MR_Next},
           {"\"repetitions\": 3,$", MR_Next},
           {"\"threads\": 1,$", MR_Next},
           {"\"aggregate_name\": \"mean\",$", MR_Next},
           {"\"aggregate_unit\": \"time\",$", MR_Next},
           {"\"iterations\": 3,$", MR_Next},
           {"\"time_unit\": \"us\",?$"},
           {"\"name\": \"BM_RepeatTimeUnit/repeats:3_median\",$"},
           {"\"family_index\": 21,$", MR_Next},
           {"\"per_family_instance_index\": 0,$", MR_Next},
           {"\"run_name\": \"BM_RepeatTimeUnit/repeats:3\",$", MR_Next},
           {"\"run_type\": \"aggregate\",$", MR_Next},
           {"\"repetitions\": 3,$", MR_Next},
           {"\"threads\": 1,$", MR_Next},
           {"\"aggregate_name\": \"median\",$", MR_Next},
           {"\"aggregate_unit\": \"time\",$", MR_Next},
           {"\"iterations\": 3,$", MR_Next},
           {"\"time_unit\": \"us\",?$"},
           {"\"name\": \"BM_RepeatTimeUnit/repeats:3_stddev\",$"},
           {"\"family_index\": 21,$", MR_Next},
           {"\"per_family_instance_index\": 0,$", MR_Next},
           {"\"run_name\": \"BM_RepeatTimeUnit/repeats:3\",$", MR_Next},
           {"\"run_type\": \"aggregate\",$", MR_Next},
           {"\"repetitions\": 3,$", MR_Next},
           {"\"threads\": 1,$", MR_Next},
           {"\"aggregate_name\": \"stddev\",$", MR_Next},
           {"\"aggregate_unit\": \"time\",$", MR_Next},
           {"\"iterations\": 3,$", MR_Next},
           {"\"time_unit\": \"us\",?$"}});
ADD_CASES(TC_CSVOut,
          {{".*BM_RepeatTimeUnit/repeats:3 ", MR_Not},
           {"^\"BM_RepeatTimeUnit/repeats:3_mean\",%csv_us_report$"},
           {"^\"BM_RepeatTimeUnit/repeats:3_median\",%csv_us_report$"},
           {"^\"BM_RepeatTimeUnit/repeats:3_stddev\",%csv_us_report$"}});

// ========================================================================= //
// -------------------- Testing user-provided statistics ------------------- //
// ========================================================================= //

const auto UserStatistics = [](const std::vector<double>& v) {
  return v.back();
};
void BM_UserStats(benchmark::State& state) {
  for (auto _ : state) {
    state.SetIterationTime(150 / 10e8);
  }
}
// clang-format off
BENCHMARK(BM_UserStats)
  ->Repetitions(3)
  ->Iterations(5)
  ->UseManualTime()
  ->ComputeStatistics("", UserStatistics);
// clang-format on

// check that user-provided stats is calculated, and is after the default-ones
// empty string as name is intentional, it would sort before anything else
ADD_CASES(TC_ConsoleOut, {{"^BM_UserStats/iterations:5/repeats:3/manual_time [ "
                           "]* 150 ns %time [ ]*5$"},
                          {"^BM_UserStats/iterations:5/repeats:3/manual_time [ "
                           "]* 150 ns %time [ ]*5$"},
                          {"^BM_UserStats/iterations:5/repeats:3/manual_time [ "
                           "]* 150 ns %time [ ]*5$"},
                          {"^BM_UserStats/iterations:5/repeats:3/"
                           "manual_time_mean [ ]* 150 ns %time [ ]*3$"},
                          {"^BM_UserStats/iterations:5/repeats:3/"
                           "manual_time_median [ ]* 150 ns %time [ ]*3$"},
                          {"^BM_UserStats/iterations:5/repeats:3/"
                           "manual_time_stddev [ ]* 0.000 ns %time [ ]*3$"},
                          {"^BM_UserStats/iterations:5/repeats:3/manual_time_ "
                           "[ ]* 150 ns %time [ ]*3$"}});
ADD_CASES(
    TC_JSONOut,
    {{"\"name\": \"BM_UserStats/iterations:5/repeats:3/manual_time\",$"},
     {"\"family_index\": 22,$", MR_Next},
     {"\"per_family_instance_index\": 0,$", MR_Next},
     {"\"run_name\": \"BM_UserStats/iterations:5/repeats:3/manual_time\",$",
      MR_Next},
     {"\"run_type\": \"iteration\",$", MR_Next},
     {"\"repetitions\": 3,$", MR_Next},
     {"\"repetition_index\": 0,$", MR_Next},
     {"\"threads\": 1,$", MR_Next},
     {"\"iterations\": 5,$", MR_Next},
     {"\"real_time\": 1\\.5(0)*e\\+(0)*2,$", MR_Next},
     {"\"name\": \"BM_UserStats/iterations:5/repeats:3/manual_time\",$"},
     {"\"family_index\": 22,$", MR_Next},
     {"\"per_family_instance_index\": 0,$", MR_Next},
     {"\"run_name\": \"BM_UserStats/iterations:5/repeats:3/manual_time\",$",
      MR_Next},
     {"\"run_type\": \"iteration\",$", MR_Next},
     {"\"repetitions\": 3,$", MR_Next},
     {"\"repetition_index\": 1,$", MR_Next},
     {"\"threads\": 1,$", MR_Next},
     {"\"iterations\": 5,$", MR_Next},
     {"\"real_time\": 1\\.5(0)*e\\+(0)*2,$", MR_Next},
     {"\"name\": \"BM_UserStats/iterations:5/repeats:3/manual_time\",$"},
     {"\"family_index\": 22,$", MR_Next},
     {"\"per_family_instance_index\": 0,$", MR_Next},
     {"\"run_name\": \"BM_UserStats/iterations:5/repeats:3/manual_time\",$",
      MR_Next},
     {"\"run_type\": \"iteration\",$", MR_Next},
     {"\"repetitions\": 3,$", MR_Next},
     {"\"repetition_index\": 2,$", MR_Next},
     {"\"threads\": 1,$", MR_Next},
     {"\"iterations\": 5,$", MR_Next},
     {"\"real_time\": 1\\.5(0)*e\\+(0)*2,$", MR_Next},
     {"\"name\": \"BM_UserStats/iterations:5/repeats:3/manual_time_mean\",$"},
     {"\"family_index\": 22,$", MR_Next},
     {"\"per_family_instance_index\": 0,$", MR_Next},
     {"\"run_name\": \"BM_UserStats/iterations:5/repeats:3/manual_time\",$",
      MR_Next},
     {"\"run_type\": \"aggregate\",$", MR_Next},
     {"\"repetitions\": 3,$", MR_Next},
     {"\"threads\": 1,$", MR_Next},
     {"\"aggregate_name\": \"mean\",$", MR_Next},
     {"\"aggregate_unit\": \"time\",$", MR_Next},
     {"\"iterations\": 3,$", MR_Next},
     {"\"real_time\": 1\\.5(0)*e\\+(0)*2,$", MR_Next},
     {"\"name\": \"BM_UserStats/iterations:5/repeats:3/manual_time_median\",$"},
     {"\"family_index\": 22,$", MR_Next},
     {"\"per_family_instance_index\": 0,$", MR_Next},
     {"\"run_name\": \"BM_UserStats/iterations:5/repeats:3/manual_time\",$",
      MR_Next},
     {"\"run_type\": \"aggregate\",$", MR_Next},
     {"\"repetitions\": 3,$", MR_Next},
     {"\"threads\": 1,$", MR_Next},
     {"\"aggregate_name\": \"median\",$", MR_Next},
     {"\"aggregate_unit\": \"time\",$", MR_Next},
     {"\"iterations\": 3,$", MR_Next},
     {"\"real_time\": 1\\.5(0)*e\\+(0)*2,$", MR_Next},
     {"\"name\": \"BM_UserStats/iterations:5/repeats:3/manual_time_stddev\",$"},
     {"\"family_index\": 22,$", MR_Next},
     {"\"per_family_instance_index\": 0,$", MR_Next},
     {"\"run_name\": \"BM_UserStats/iterations:5/repeats:3/manual_time\",$",
      MR_Next},
     {"\"run_type\": \"aggregate\",$", MR_Next},
     {"\"repetitions\": 3,$", MR_Next},
     {"\"threads\": 1,$", MR_Next},
     {"\"aggregate_name\": \"stddev\",$", MR_Next},
     {"\"aggregate_unit\": \"time\",$", MR_Next},
     {"\"iterations\": 3,$", MR_Next},
     {"\"real_time\": %float,$", MR_Next},
     {"\"name\": \"BM_UserStats/iterations:5/repeats:3/manual_time_\",$"},
     {"\"family_index\": 22,$", MR_Next},
     {"\"per_family_instance_index\": 0,$", MR_Next},
     {"\"run_name\": \"BM_UserStats/iterations:5/repeats:3/manual_time\",$",
      MR_Next},
     {"\"run_type\": \"aggregate\",$", MR_Next},
     {"\"repetitions\": 3,$", MR_Next},
     {"\"threads\": 1,$", MR_Next},
     {"\"aggregate_name\": \"\",$", MR_Next},
     {"\"aggregate_unit\": \"time\",$", MR_Next},
     {"\"iterations\": 3,$", MR_Next},
     {"\"real_time\": 1\\.5(0)*e\\+(0)*2,$", MR_Next}});
ADD_CASES(
    TC_CSVOut,
    {{"^\"BM_UserStats/iterations:5/repeats:3/manual_time\",%csv_report$"},
     {"^\"BM_UserStats/iterations:5/repeats:3/manual_time\",%csv_report$"},
     {"^\"BM_UserStats/iterations:5/repeats:3/manual_time\",%csv_report$"},
     {"^\"BM_UserStats/iterations:5/repeats:3/manual_time_mean\",%csv_report$"},
     {"^\"BM_UserStats/iterations:5/repeats:3/"
      "manual_time_median\",%csv_report$"},
     {"^\"BM_UserStats/iterations:5/repeats:3/"
      "manual_time_stddev\",%csv_report$"},
     {"^\"BM_UserStats/iterations:5/repeats:3/manual_time_\",%csv_report$"}});

// ========================================================================= //
// ------------- Testing relative standard deviation statistics ------------ //
// ========================================================================= //

const auto UserPercentStatistics = [](const std::vector<double>&) {
  return 1. / 100.;
};
void BM_UserPercentStats(benchmark::State& state) {
  for (auto _ : state) {
    state.SetIterationTime(150 / 10e8);
  }
}
// clang-format off
BENCHMARK(BM_UserPercentStats)
  ->Repetitions(3)
  ->Iterations(5)
  ->UseManualTime()
  ->Unit(benchmark::TimeUnit::kNanosecond)
  ->ComputeStatistics("", UserPercentStatistics, benchmark::StatisticUnit::kPercentage);
// clang-format on

// check that UserPercent-provided stats is calculated, and is after the
// default-ones empty string as name is intentional, it would sort before
// anything else
ADD_CASES(TC_ConsoleOut,
          {{"^BM_UserPercentStats/iterations:5/repeats:3/manual_time [ "
            "]* 150 ns %time [ ]*5$"},
           {"^BM_UserPercentStats/iterations:5/repeats:3/manual_time [ "
            "]* 150 ns %time [ ]*5$"},
           {"^BM_UserPercentStats/iterations:5/repeats:3/manual_time [ "
            "]* 150 ns %time [ ]*5$"},
           {"^BM_UserPercentStats/iterations:5/repeats:3/"
            "manual_time_mean [ ]* 150 ns %time [ ]*3$"},
           {"^BM_UserPercentStats/iterations:5/repeats:3/"
            "manual_time_median [ ]* 150 ns %time [ ]*3$"},
           {"^BM_UserPercentStats/iterations:5/repeats:3/"
            "manual_time_stddev [ ]* 0.000 ns %time [ ]*3$"},
           {"^BM_UserPercentStats/iterations:5/repeats:3/manual_time_ "
            "[ ]* 1.00 % [ ]* 1.00 %[ ]*3$"}});
ADD_CASES(
    TC_JSONOut,
    {{"\"name\": \"BM_UserPercentStats/iterations:5/repeats:3/manual_time\",$"},
     {"\"family_index\": 23,$", MR_Next},
     {"\"per_family_instance_index\": 0,$", MR_Next},
     {"\"run_name\": "
      "\"BM_UserPercentStats/iterations:5/repeats:3/manual_time\",$",
      MR_Next},
     {"\"run_type\": \"iteration\",$", MR_Next},
     {"\"repetitions\": 3,$", MR_Next},
     {"\"repetition_index\": 0,$", MR_Next},
     {"\"threads\": 1,$", MR_Next},
     {"\"iterations\": 5,$", MR_Next},
     {"\"real_time\": 1\\.5(0)*e\\+(0)*2,$", MR_Next},
     {"\"name\": \"BM_UserPercentStats/iterations:5/repeats:3/manual_time\",$"},
     {"\"family_index\": 23,$", MR_Next},
     {"\"per_family_instance_index\": 0,$", MR_Next},
     {"\"run_name\": "
      "\"BM_UserPercentStats/iterations:5/repeats:3/manual_time\",$",
      MR_Next},
     {"\"run_type\": \"iteration\",$", MR_Next},
     {"\"repetitions\": 3,$", MR_Next},
     {"\"repetition_index\": 1,$", MR_Next},
     {"\"threads\": 1,$", MR_Next},
     {"\"iterations\": 5,$", MR_Next},
     {"\"real_time\": 1\\.5(0)*e\\+(0)*2,$", MR_Next},
     {"\"name\": \"BM_UserPercentStats/iterations:5/repeats:3/manual_time\",$"},
     {"\"family_index\": 23,$", MR_Next},
     {"\"per_family_instance_index\": 0,$", MR_Next},
     {"\"run_name\": "
      "\"BM_UserPercentStats/iterations:5/repeats:3/manual_time\",$",
      MR_Next},
     {"\"run_type\": \"iteration\",$", MR_Next},
     {"\"repetitions\": 3,$", MR_Next},
     {"\"repetition_index\": 2,$", MR_Next},
     {"\"threads\": 1,$", MR_Next},
     {"\"iterations\": 5,$", MR_Next},
     {"\"real_time\": 1\\.5(0)*e\\+(0)*2,$", MR_Next},
     {"\"name\": "
      "\"BM_UserPercentStats/iterations:5/repeats:3/manual_time_mean\",$"},
     {"\"family_index\": 23,$", MR_Next},
     {"\"per_family_instance_index\": 0,$", MR_Next},
     {"\"run_name\": "
      "\"BM_UserPercentStats/iterations:5/repeats:3/manual_time\",$",
      MR_Next},
     {"\"run_type\": \"aggregate\",$", MR_Next},
     {"\"repetitions\": 3,$", MR_Next},
     {"\"threads\": 1,$", MR_Next},
     {"\"aggregate_name\": \"mean\",$", MR_Next},
     {"\"aggregate_unit\": \"time\",$", MR_Next},
     {"\"iterations\": 3,$", MR_Next},
     {"\"real_time\": 1\\.5(0)*e\\+(0)*2,$", MR_Next},
     {"\"name\": "
      "\"BM_UserPercentStats/iterations:5/repeats:3/manual_time_median\",$"},
     {"\"family_index\": 23,$", MR_Next},
     {"\"per_family_instance_index\": 0,$", MR_Next},
     {"\"run_name\": "
      "\"BM_UserPercentStats/iterations:5/repeats:3/manual_time\",$",
      MR_Next},
     {"\"run_type\": \"aggregate\",$", MR_Next},
     {"\"repetitions\": 3,$", MR_Next},
     {"\"threads\": 1,$", MR_Next},
     {"\"aggregate_name\": \"median\",$", MR_Next},
     {"\"aggregate_unit\": \"time\",$", MR_Next},
     {"\"iterations\": 3,$", MR_Next},
     {"\"real_time\": 1\\.5(0)*e\\+(0)*2,$", MR_Next},
     {"\"name\": "
      "\"BM_UserPercentStats/iterations:5/repeats:3/manual_time_stddev\",$"},
     {"\"family_index\": 23,$", MR_Next},
     {"\"per_family_instance_index\": 0,$", MR_Next},
     {"\"run_name\": "
      "\"BM_UserPercentStats/iterations:5/repeats:3/manual_time\",$",
      MR_Next},
     {"\"run_type\": \"aggregate\",$", MR_Next},
     {"\"repetitions\": 3,$", MR_Next},
     {"\"threads\": 1,$", MR_Next},
     {"\"aggregate_name\": \"stddev\",$", MR_Next},
     {"\"aggregate_unit\": \"time\",$", MR_Next},
     {"\"iterations\": 3,$", MR_Next},
     {"\"real_time\": %float,$", MR_Next},
     {"\"name\": "
      "\"BM_UserPercentStats/iterations:5/repeats:3/manual_time_\",$"},
     {"\"family_index\": 23,$", MR_Next},
     {"\"per_family_instance_index\": 0,$", MR_Next},
     {"\"run_name\": "
      "\"BM_UserPercentStats/iterations:5/repeats:3/manual_time\",$",
      MR_Next},
     {"\"run_type\": \"aggregate\",$", MR_Next},
     {"\"repetitions\": 3,$", MR_Next},
     {"\"threads\": 1,$", MR_Next},
     {"\"aggregate_name\": \"\",$", MR_Next},
     {"\"aggregate_unit\": \"percentage\",$", MR_Next},
     {"\"iterations\": 3,$", MR_Next},
     {"\"real_time\": 1\\.(0)*e-(0)*2,$", MR_Next}});
ADD_CASES(TC_CSVOut, {{"^\"BM_UserPercentStats/iterations:5/repeats:3/"
                       "manual_time\",%csv_report$"},
                      {"^\"BM_UserPercentStats/iterations:5/repeats:3/"
                       "manual_time\",%csv_report$"},
                      {"^\"BM_UserPercentStats/iterations:5/repeats:3/"
                       "manual_time\",%csv_report$"},
                      {"^\"BM_UserPercentStats/iterations:5/repeats:3/"
                       "manual_time_mean\",%csv_report$"},
                      {"^\"BM_UserPercentStats/iterations:5/repeats:3/"
                       "manual_time_median\",%csv_report$"},
                      {"^\"BM_UserPercentStats/iterations:5/repeats:3/"
                       "manual_time_stddev\",%csv_report$"},
                      {"^\"BM_UserPercentStats/iterations:5/repeats:3/"
                       "manual_time_\",%csv_report$"}});

// ========================================================================= //
// ------------------------- Testing StrEscape JSON ------------------------ //
// ========================================================================= //
#if 0  // enable when csv testing code correctly handles multi-line fields
void BM_JSON_Format(benchmark::State& state) {
  state.SkipWithError("val\b\f\n\r\t\\\"with\"es,capes");
  for (auto _ : state) {
  }
}
BENCHMARK(BM_JSON_Format);
ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_JSON_Format\",$"},
                                              {"\"family_index\": 23,$", MR_Next},
{"\"per_family_instance_index\": 0,$", MR_Next},
                       {"\"run_name\": \"BM_JSON_Format\",$", MR_Next},
                       {"\"run_type\": \"iteration\",$", MR_Next},
                       {"\"repetitions\": 1,$", MR_Next},
                       {"\"repetition_index\": 0,$", MR_Next},
                       {"\"threads\": 1,$", MR_Next},
                       {"\"error_occurred\": true,$", MR_Next},
                       {R"("error_message": "val\\b\\f\\n\\r\\t\\\\\\"with\\"es,capes",$)", MR_Next}});
#endif
// ========================================================================= //
// -------------------------- Testing CsvEscape ---------------------------- //
// ========================================================================= //

void BM_CSV_Format(benchmark::State& state) {
  state.SkipWithError("\"freedom\"");
  for (auto _ : state) {
  }
}
BENCHMARK(BM_CSV_Format);
ADD_CASES(TC_CSVOut, {{"^\"BM_CSV_Format\",,,,,,,,true,\"\"\"freedom\"\"\"$"}});

// ========================================================================= //
// --------------------------- TEST CASES END ------------------------------ //
// ========================================================================= //

int main(int argc, char* argv[]) { RunOutputTests(argc, argv); }