Class test_exception

tests/BS_thread_pool_test.cpp:2158–2161

* @brief An exception class to be thrown when testing exception handling. */

 * @brief An exception class to be thrown when testing exception handling.
 */
struct test_exception : public std::runtime_error
{
    test_exception() : std::runtime_error("Exception thrown!") {};
};

/**
 * @brief A function that throws a `test_exception`.