compat.boost-asio

// Behavioral test for compat.boost-asio: a real steady_timer fires through a
// running io_context, post/defech queue in order, and the C++20 coroutine
// surface (co_spawn + awaitable) adds numbers. All offline, no sockets.
#include <boost/asio.hpp>

int main() {
    namespace asio = boost::asio;
    using asio::ip::tcp;
    bool ok = true;

    // 1. A steady_timer with a 1ms expiry actually wakes the io_context.
    {
        asio::io_context ctx;
        bool fired = false;
        asio::steady_timer timer(ctx, std::chrono::milliseconds(1));
        timer.async_wait([&](const boost::system::error_code& ec) {
            fired = !ec.failed();
        });
        ctx.run();
        ok = ok && fired;
    }

// …