gitfor/platform

import { describe, expect, test } from "bun:test";
import { ipBucket } from "./ip";

describe("ipBucket", () => {
  test("IPv4 and unknown stay exact", () => {
    expect(ipBucket("203.0.113.9")).toBe("203.0.113.9");
    expect(ipBucket("unknown")).toBe("unknown");
    expect(ipBucket("::ffff:203.0.113.9")).toBe("::ffff:203.0.113.9");
  });

  test("IPv6 addresses in one /64 share a key", () => {
    const key = ipBucket("2001:db8:1:2:aaaa:bbbb:cccc:dddd");
    expect(key).toBe("2001:db8:1:2::/64");
    expect(ipBucket("2001:0DB8:0001:0002::1")).toBe(key);
    expect(ipBucket("2001:db8:1:2::")).toBe(key);
    expect(ipBucket("2001:db8:1:3::1")).not.toBe(key);
  });

  test("compressed forms expand before bucketing", () => {
    expect(ipBucket("2001:db8::1")).toBe("2001:db8:0:0::/64");
    expect(ipBucket("::1")).toBe("0:0:0:0::/64");
  });

  test("malformed input is left as-is", () => {
    expect(ipBucket("1::2::3")).toBe("1::2::3");
    expect(ipBucket("fe80::1%eth0")).toBe("fe80::1%eth0");
    expect(ipBucket("12345::1")).toBe("12345::1");
  });
});