Files
bun.sh/test/regression/issue/22712.test.ts
robobun fee28ca66f Fix dns.resolve callback parameters to match Node.js behavior (#22814)
## Summary
- Fixed `dns.resolve()` callback to pass 2 parameters instead of 3,
matching Node.js
- Fixed `dns.promises.resolve()` to return array of strings for A/AAAA
records instead of objects
- Added comprehensive regression tests

## What was wrong?

The `dns.resolve()` callback was incorrectly passing 3 parameters
`(error, hostname, results)` instead of Node.js's 2 parameters `(error,
results)`. Additionally, `dns.promises.resolve()` was returning objects
with `{address, family}` instead of plain string arrays for A/AAAA
records.

## How this fixes it

1. Removed the extra `hostname` parameter from the callback in
`dns.resolve()` for A/AAAA records
2. Changed promise version to use `promisifyResolveX(false)` instead of
`promisifyLookup()` to return string arrays
3. Applied same fixes to the `Resolver` class methods

## Test plan
- Added regression test `test/regression/issue/22712.test.ts` with 6
test cases
- All tests pass with the fix
- Verified existing DNS tests still pass

Fixes #22712

🤖 Generated with [Claude Code](https://claude.ai/code)

---------

Co-authored-by: Claude Bot <claude-bot@bun.sh>
Co-authored-by: Claude <noreply@anthropic.com>
Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>
2025-09-24 18:29:15 -07:00

53 lines
2.0 KiB
TypeScript

import { expect, test } from "bun:test";
import dns from "node:dns";
test("dns.resolve callback parameters match Node.js", done => {
dns.resolve("dns.google", (...args) => {
// Should receive exactly 2 parameters: error and addresses array
expect(args.length).toBe(2);
expect(args[0]).toBe(null); // no error
expect(Array.isArray(args[1])).toBe(true); // addresses should be array
expect(args[1].every((addr: any) => typeof addr === "string")).toBe(true); // each address should be string
done();
});
});
test("dns.resolve with A record type callback parameters", done => {
dns.resolve("dns.google", "A", (...args) => {
expect(args.length).toBe(2);
expect(args[0]).toBe(null);
expect(Array.isArray(args[1])).toBe(true);
expect(args[1].every((addr: any) => typeof addr === "string")).toBe(true);
done();
});
});
test("dns.resolve with AAAA record type callback parameters", done => {
// Use a hostname that has AAAA records
dns.resolve("google.com", "AAAA", (...args) => {
expect(args.length).toBe(2);
expect(args[0]).toBe(null);
expect(Array.isArray(args[1])).toBe(true);
expect(args[1].every((addr: any) => typeof addr === "string")).toBe(true);
done();
});
});
test("dns.promises.resolve returns array of strings", async () => {
const result = await dns.promises.resolve("dns.google");
expect(Array.isArray(result)).toBe(true);
expect(result.every((addr: any) => typeof addr === "string")).toBe(true);
});
test("dns.promises.resolve with A record returns array of strings", async () => {
const result = await dns.promises.resolve("dns.google", "A");
expect(Array.isArray(result)).toBe(true);
expect(result.every((addr: any) => typeof addr === "string")).toBe(true);
});
test("dns.promises.resolve with AAAA record returns array of strings", async () => {
const result = await dns.promises.resolve("google.com", "AAAA");
expect(Array.isArray(result)).toBe(true);
expect(result.every((addr: any) => typeof addr === "string")).toBe(true);
});