Function BOOST_FIXTURE_TEST_CASE

src/test/settings_tests.cpp:183–262

Regression test covering different ways config settings can be merged. The test parses and merges settings, representing the results as strings that get compared against an expected hash. To debug, the result strings can be dumped to a file (see comments below).

// compared against an expected hash. To debug, the result strings can be dumped
// to a file (see comments below).
BOOST_FIXTURE_TEST_CASE(Merge, MergeTestingSetup)
{
    CHash256 out_sha;
    FILE* out_file = nullptr;
    if (const char* out_path = getenv("SETTINGS_MERGE_TEST_OUT")) {
        out_file = fsbridge::fopen(out_path, "w");
        if (!out_file) throw std::system_error(errno, std::generic_category(), "fopen failed");
    }

    const std::string& network = CBaseChainParams::MAIN;
    ForEachMergeSetup([&](const ActionList& arg_actions, const ActionList& conf_actions, bool force_set,
                          bool ignore_default_section_config) {
        std::string desc;
        int value_suffix = 0;
        util::Settings settings;

        const std::string& name = ignore_default_section_config ? "wallet" : "server";
        auto push_values = [&](Action action, const char* value_prefix, const std::string& name_prefix,
                               std::vector<util::SettingsValue>& dest) {
            if (action == SET || action == SECTION_SET) {
                for (int i = 0; i < 2; ++i) {
                    dest.push_back(value_prefix + ToString(++value_suffix));
                    desc += " " + name_prefix + name + "=" + dest.back().get_str();
                }
            } else if (action == NEGATE || action == SECTION_NEGATE) {
                dest.push_back(false);
                desc += " " + name_prefix + "no" + name;
            }
        };

        if (force_set) {
            settings.forced_settings[name] = "forced";
            desc += " " + name + "=forced";
        }
        for (Action arg_action : arg_actions) {
            push_values(arg_action, "a", "-", settings.command_line_options[name]);
        }
        for (Action conf_action : conf_actions) {
            bool use_section = conf_action == SECTION_SET || conf_action == SECTION_NEGATE;
            push_values(conf_action, "c", use_section ? network + "." : "",
                settings.ro_config[use_section ? network : ""][name]);
        }

        desc += " || ";
        desc += GetSetting(settings, network, name, ignore_default_section_config, /* get_chain_name= */ false).write();
        desc += " |";
        for (const auto& s : GetSettingsList(settings, network, name, ignore_default_section_config)) {
            desc += " ";
            desc += s.write();
        }
        desc += " |";
        if (OnlyHasDefaultSectionSetting(settings, network, name)) desc += " ignored";
        desc += "\n";

        out_sha.Write(MakeUCharSpan(desc));
        if (out_file) {
            BOOST_REQUIRE(fwrite(desc.data(), 1, desc.size(), out_file) == desc.size());
        }