text: // Copyright (c) 2018-2020 The Zenacoin Core developers
  // Distributed under the MIT software license, see the accompanying
  // file COPYING or http://www.opensource.org/licenses/mit-license.php.
  
  #include <test/util/setup_common.h>
  #include <util/string.h>
  #include <util/threadnames.h>
  
  #include <mutex>
  #include <set>
  #include <thread>
  #include <vector>
  
  #if defined(HAVE_CONFIG_H)
  #include <config/zenacoin-config.h>
  #endif
  
  #include <boost/test/unit_test.hpp>
  
  BOOST_FIXTURE_TEST_SUITE(util_threadnames_tests, BasicTestingSetup)
  
  const std::string TEST_THREAD_NAME_BASE = "test_thread.";
  
  /**
   * Run a bunch of threads to all call util::ThreadRename.
   *
   * @return the set of name each thread has after attempted renaming.
   */
  std::set<std::string> RenameEnMasse(int num_threads)
  {
      std::vector<std::thread> threads;
      std::set<std::string> names;
      std::mutex lock;
  
      auto RenameThisThread = [&](int i) {
          util::ThreadRename(TEST_THREAD_NAME_BASE + ToString(i));
          std::lock_guard<std::mutex> guard(lock);
          names.insert(util::ThreadGetInternalName());
      };
  
      for (int i = 0; i < num_threads; ++i) {
          threads.push_back(std::thread(RenameThisThread, i));
      }
  
      for (std::thread& thread : threads) thread.join();
  
      return names;
  }
  
  /**
   * Rename a bunch of threads with the same basename (expect_multiple=true), ensuring suffixes are
   * applied properly.
   */
  BOOST_AUTO_TEST_CASE(util_threadnames_test_rename_threaded)
  {
  #if !defined(HAVE_THREAD_LOCAL)
      // This test doesn't apply to platforms where we don't have thread_local.
      return;
  #endif
  
      std::set<std::string> names = RenameEnMasse(100);
  
      BOOST_CHECK_EQUAL(names.size(), 100U);
  
      // Names "test_thread.[n]" should exist for n = [0, 99]
      for (int i = 0; i < 100; ++i) {
          BOOST_CHECK(names.find(TEST_THREAD_NAME_BASE + ToString(i)) != names.end());
      }
  
  }
  
  BOOST_AUTO_TEST_SUITE_END()
  