daggy/libdaggy/tests/unit_threadpool.cpp

#include <catch2/catch.hpp>
#include <future>
#include <iostream>

#include "daggy/ThreadPool.hpp"

using namespace daggy;

TEST_CASE("threadpool", "[threadpool]")
{
  std::atomic<uint32_t> cnt(0);
  ThreadPool tp(10);

  std::vector<std::future<uint32_t>> rets;

  SECTION("Adding large tasks queues with return values")
  {
    auto tq = std::make_shared<daggy::TaskQueue>();
    std::vector<std::future<uint32_t>> res;
    for (size_t i = 0; i < 100; ++i)
      res.emplace_back(tq->addTask([&cnt]() {
        cnt++;
        return cnt.load();
      }));
    tp.addTasks(tq);
    for (auto &r : res)
      r.get();
    REQUIRE(cnt == 100);
  }

  SECTION("Slow runs")
  {
    std::vector<std::future<void>> res;
    using namespace std::chrono_literals;
    for (size_t i = 0; i < 100; ++i)
      res.push_back(tp.addTask([&cnt]() {
        std::this_thread::sleep_for(20ms);
        cnt++;
        return;
      }));
    for (auto &r : res)
      r.get();
    REQUIRE(cnt == 100);
  }
}