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

const R = require("ramda");
const fs = require("fs");
const { getDomains } = require("../utils/get-domain");
const { validateDomainData } = require("../utils/validations");
const { DOMAINS_PATH } = require("../utils/constants");

describe("Domains", () => {
    it("should all be json", async () => {
        const files = await fs.promises.readdir(DOMAINS_PATH, {});
        expect(files.filter((f) => !/\.json$/g.test(f)).length).toBe(0);
    });

    it("should be valid", (done) => {
        getDomains()
            .then(R.reject(R.propEq("name", "_psl")))
            .then(
                R.map((data) => {
                    const { errors } = validateDomainData(data);
                    if (errors.length) {
                        const message = errors
                            .map(
                                ([key, { reason }]) =>
                                    `[${data.name}.${key}]: ${reason}`,
                            )
                            .join("\n");
                        return `\nValidation errors in ${data.name}.json: \n${message}`;
                    }
                    return "";
                }),
            )
            .then(R.filter(R.complement(R.isEmpty)))
            .then((messages) =>
                messages.length ? done(messages.join("\n")) : done(),
            )
            .catch(done);
    });
});