Boost C++ Libraries

...one of the most highly regarded and expertly designed C++ library projects in the world. — Herb Sutter and Andrei Alexandrescu, C++ Coding Standards

defines testing result collector components

Defines class results_collector_t that is responsible for gathering test results and class test_results for presenting this information to end-user

namespace boost {
  namespace unit_test {
    class results_collector_t;
    class test_results;
  }
}