Method await_test_runners_completed

test/test.cpp:348–355

Wait for test-runners to be completed. * * Important: may only be called once by a single thread! */

     * Important: may only be called once by a single thread!
     */
    void await_test_runners_completed() {
#ifndef NDEBUG
      bool some_waiting =
#endif
        execution_done_wait_started.exchange(true);
      assert(some_waiting == false && "Only one thread is allowed to await the result");
      execution_done_event.wait();
    }
  private:
    /// Set flag that failure has occurred.
    void set_failure() {