cpp-rotor/tests/011-ping_pong.cpp

//
// Copyright (c) 2019 Ivan Baidakou (basiliscos) (the dot dmol at gmail dot com)
//
// Distributed under the MIT Software License
//

#include "catch.hpp"
#include "rotor.hpp"
#include "supervisor_test.h"

namespace r = rotor;
namespace rt = r::test;

struct ping_t {};
struct pong_t {};

static std::uint32_t destroyed = 0;

struct pinger_t : public r::actor_base_t {
    std::uint32_t ping_sent;
    std::uint32_t pong_received;

    explicit pinger_t(r::supervisor_t &sup) : r::actor_base_t{sup} { ping_sent = pong_received = 0; }
    ~pinger_t() override { destroyed += 1; }

    void set_ponger_addr(const r::address_ptr_t &addr) { ponger_addr = addr; }

    void init_start() noexcept override {
        subscribe(&pinger_t::on_pong);
        r::actor_base_t::init_start();
    }

    void on_start(r::message_t<r::payload::start_actor_t> &msg) noexcept override {
        ++ping_sent;
        r::actor_base_t::on_start(msg);
        send<ping_t>(ponger_addr);
    }

    void on_pong(r::message_t<pong_t> &) noexcept { ++pong_received; }

    r::address_ptr_t ponger_addr;
};

struct ponger_t : public r::actor_base_t {
    std::uint32_t ping_received;
    std::uint32_t pong_sent;

    explicit ponger_t(r::supervisor_t &sup) : r::actor_base_t{sup} { ping_received = pong_sent = 0; }
    ~ponger_t() override { destroyed += 3; }

    void set_pinger_addr(const r::address_ptr_t &addr) { pinger_addr = addr; }

    void init_start() noexcept override {
        subscribe(&ponger_t::on_ping);
        r::actor_base_t::init_start();
    }

    void on_ping(r::message_t<ping_t> &) noexcept {
        ++ping_received;
        send<pong_t>(pinger_addr);
        ++pong_sent;
    }

  private:
    r::address_ptr_t pinger_addr;
};

TEST_CASE("ping-pong", "[supervisor]") {
    r::system_context_t system_context;

    auto timeout = r::pt::milliseconds{1};
    rt::supervisor_config_test_t config(timeout, nullptr);
    auto sup = system_context.create_supervisor<rt::supervisor_test_t>(nullptr, config);
    auto pinger = sup->create_actor<pinger_t>(timeout);
    auto ponger = sup->create_actor<ponger_t>(timeout);

    pinger->set_ponger_addr(ponger->get_address());
    ponger->set_pinger_addr(pinger->get_address());

    sup->do_process();
    REQUIRE(pinger->ping_sent == 1);
    REQUIRE(pinger->pong_received == 1);
    REQUIRE(ponger->pong_sent == 1);
    REQUIRE(ponger->ping_received == 1);

    sup->do_shutdown();
    sup->do_process();
    REQUIRE(sup->get_state() == r::state_t::SHUTTED_DOWN);
    REQUIRE(sup->get_leader_queue().size() == 0);
    REQUIRE(sup->get_points().size() == 0);
    REQUIRE(sup->get_subscription().size() == 0);

    pinger.reset();
    ponger.reset();
    REQUIRE(destroyed == 4);
}