is-a-dev/tests/proxy.test.js

const t = require("ava");
const fs = require("fs-extra");
const path = require("path");

const requiredRecordsToProxy = new Set(["A", "AAAA", "CNAME"]);

const domainCache = {};

function getDomainData(file) {
    if (domainCache[file]) {
        return domainCache[file];
    }

    try {
        const data = fs.readJsonSync(path.join(domainsPath, file));
        domainCache[file] = data;
        return data;
    } catch (error) {
        throw new Error(`Failed to read JSON for ${file}: ${error.message}`);
    }
}

function validateProxiedRecords(t, data, file) {
    // Convert the Set to an array for message display (moved outside the loop to optimize performance)
    const recordTypes = Array.from(requiredRecordsToProxy).join(", ");

    if (data.proxied) {
        const hasProxiedRecord = Object.keys(data.record).some((key) =>
            requiredRecordsToProxy.has(key),
        );

        t.true(
            hasProxiedRecord,
            `${file}: Proxied is true but there are no records that can be proxied (${recordTypes} expected)`,
        );
    }
}

const domainsPath = path.resolve("domains");
const files = fs
    .readdirSync(domainsPath)
    .filter((file) => file.endsWith(".json"));

t(
    "Domains with proxy enabled must have at least one proxy-able record",
    (t) => {
        files.forEach((file) => {
            const domain = getDomainData(file);

            validateProxiedRecords(t, domain, file);
        });
    },
);