All-purpose-Connection-Pool/tests/adapter_tests.cpp at main · cpp-agan-team/All-purpose-Connection-Pool · GitHub

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#include "test_utils.hpp"

#include "universal_connection_pool/adapters/fake.hpp"
#include "universal_connection_pool/adapters.hpp"
#include "universal_connection_pool/connection_pool.hpp"

#include <atomic>
#include <chrono>
#include <string>

namespace {

struct adapter_client {
    std::string endpoint;
    bool healthy = true;
    int reset_count = 0;
};

struct adapter_traits {
    static adapter_client create(const ucp::endpoint_config& endpoint) {
        return adapter_client{endpoint.id, true, 0};
    }

    static void reset(adapter_client& client) {
        ++client.reset_count;
    }

    static void close(adapter_client& client) {
        client.healthy = false;
    }

    static ucp::health_result check(adapter_client& client) {
        return client.healthy ? ucp::health_result::healthy()
                              : ucp::health_result::broken("adapter client unhealthy");
    }

    static std::string describe(const adapter_client& client) {
        return "adapter@" + client.endpoint;
    }
};

} // namespace

UCP_TEST(AdapterTraits_CreateFactoryAndHealthChecker_WorkWithPool) {
    ucp::pool_options options;
    options.max_size = 1;
    options.reaper_interval = std::chrono::milliseconds(0);
    options.endpoints = {ucp::endpoint_config{.id = "adapter-endpoint"}};

    auto factory = ucp::make_adapter_factory<adapter_client, adapter_traits>();
    auto checker = ucp::make_adapter_health_checker<adapter_client, adapter_traits>();
    ucp::connection_pool<adapter_client> pool(factory, checker, options);

    {
        auto client = pool.borrow();
        UCP_EXPECT_EQ(client->endpoint, std::string("adapter-endpoint"));
        UCP_EXPECT_TRUE(client->healthy);
    }

    const auto stats = pool.stats();
    UCP_EXPECT_EQ(stats.returned_total, 1u);
    UCP_EXPECT_EQ(stats.idle_connections, 1u);
}

UCP_TEST(AdapterMetadata_RegistryGroupsAdaptersByKindAndMaturity) {
    const auto registry = ucp::adapters::fake::registry();

    const auto* database = registry.find("fake_database");
    UCP_EXPECT_TRUE(database != nullptr);
    UCP_EXPECT_EQ(database->name, std::string("fake_database"));
    UCP_EXPECT_EQ(static_cast<int>(database->kind), static_cast<int>(ucp::adapter_kind::database));
    UCP_EXPECT_EQ(static_cast<int>(database->maturity),
                  static_cast<int>(ucp::adapter_maturity::experimental));
    UCP_EXPECT_TRUE(database->contract.reusable);
    UCP_EXPECT_TRUE(database->contract.resettable);
    UCP_EXPECT_TRUE(!database->not_recommended_for.empty());

    const auto stable = registry.by_maturity(ucp::adapter_maturity::stable);
    UCP_EXPECT_EQ(stable.size(), 1u);
    UCP_EXPECT_EQ(stable.front().name, std::string("fake_http_keepalive"));

    const auto devices = registry.by_kind(ucp::adapter_kind::device);
    UCP_EXPECT_EQ(devices.size(), 1u);
    UCP_EXPECT_FALSE(devices.front().contract.reusable);
}

UCP_TEST(AdapterTraits_ApplyProtocolContractAndResetCallbacks) {
    using traits = ucp::adapters::fake::database_traits;
    auto options = ucp::apply_adapter_contract<traits>(ucp::pool_options{});
    options.max_size = 1;
    options.reaper_interval = std::chrono::milliseconds(0);
    options.endpoints = {ucp::endpoint_config{.id = "db-primary"}};

    auto factory = ucp::make_adapter_factory<ucp::adapters::fake::client, traits>();
    auto checker = ucp::make_adapter_health_checker<ucp::adapters::fake::client, traits>();
    ucp::connection_pool<ucp::adapters::fake::client> pool(factory, checker, options);

    {
        auto client = pool.borrow();
        client->transaction_open = true;
    }

    const auto stats = pool.stats();
    UCP_EXPECT_EQ(stats.protocol_reset_total, 1u);
    UCP_EXPECT_EQ(stats.idle_connections, 1u);

    auto reused = pool.borrow();
    UCP_EXPECT_FALSE(reused->transaction_open);
    UCP_EXPECT_EQ(reused->reset_count, 1);
}

UCP_TEST(AdapterTraits_InspectReturnCanQuarantineAdapterConnection) {
    using traits = ucp::adapters::fake::http_keepalive_traits;
    auto options = ucp::apply_adapter_contract<traits>(ucp::pool_options{});
    options.max_size = 1;
    options.reaper_interval = std::chrono::milliseconds(0);
    options.endpoints = {ucp::endpoint_config{.id = "api"}};

    auto factory = ucp::make_adapter_factory<ucp::adapters::fake::client, traits>();
    auto checker = ucp::make_adapter_health_checker<ucp::adapters::fake::client, traits>();
    ucp::connection_pool<ucp::adapters::fake::client> pool(factory, checker, options);

    {
        auto client = pool.borrow();
        client->pipeline_dirty = true;
    }

    const auto stats = pool.stats();
    UCP_EXPECT_EQ(stats.protocol_quarantine_total, 1u);
    UCP_EXPECT_EQ(stats.protocol_close_total, 1u);
    UCP_EXPECT_EQ(stats.idle_connections, 0u);
}