cloudflare-domain-manager/packages/shared/test/subdomain.test.ts

import { describe, expect, it } from "vitest";
import {
  dnsRecordNamesMatch,
  dnsNameToSubdomainLabel,
  normalizeDnsRecordName,
} from "../src/subdomain.js";

const ZONE = "rkns.top";

describe("normalizeDnsRecordName", () => {
  it("normalizes short labels to FQDN", () => {
    expect(normalizeDnsRecordName("de", ZONE)).toBe("de.rkns.top");
    expect(normalizeDnsRecordName("mhome", ZONE)).toBe("mhome.rkns.top");
  });

  it("keeps FQDN unchanged", () => {
    expect(normalizeDnsRecordName("ihome.rkns.top", ZONE)).toBe(
      "ihome.rkns.top",
    );
  });

  it("maps apex forms to zone name", () => {
    expect(normalizeDnsRecordName("@", ZONE)).toBe("rkns.top");
    expect(normalizeDnsRecordName("rkns.top", ZONE)).toBe("rkns.top");
  });

  it("normalizes nested wildcard relative name to FQDN", () => {
    expect(normalizeDnsRecordName("*.mdns", ZONE)).toBe("*.mdns.rkns.top");
    expect(normalizeDnsRecordName("*.mdns.rkns.top", ZONE)).toBe(
      "*.mdns.rkns.top",
    );
  });
});

describe("dnsRecordNamesMatch", () => {
  it("matches short label and FQDN for the same host", () => {
    expect(dnsRecordNamesMatch("de", "de.rkns.top", ZONE)).toBe(true);
    expect(dnsRecordNamesMatch("mhome", "mhome.rkns.top", ZONE)).toBe(true);
  });

  it("does not match different hosts", () => {
    expect(dnsRecordNamesMatch("de", "mhome.rkns.top", ZONE)).toBe(false);
  });

  it("matches nested wildcard relative name and FQDN", () => {
    expect(dnsRecordNamesMatch("*.mdns", "*.mdns.rkns.top", ZONE)).toBe(true);
  });
});

describe("dnsNameToSubdomainLabel", () => {
  it("extracts label from FQDN", () => {
    expect(dnsNameToSubdomainLabel("de.rkns.top", ZONE)).toBe("de");
  });

  it("keeps nested wildcard relative names", () => {
    expect(dnsNameToSubdomainLabel("*.mdns", ZONE)).toBe("*.mdns");
    expect(dnsNameToSubdomainLabel("*.mdns.rkns.top", ZONE)).toBe("*.mdns");
  });
});