from-url.test.ts

import { describe, expect, test } from "vitest";
import { fromUrl, NO_HOSTNAME } from "./from-url.js";

describe(fromUrl.name, () => {
  test("it returns the hostname only", () => {
    expect(fromUrl("https://user@www.example.com:8080/path?query")).toBe(
      "www.example.com",
    );
  });

  test("it handles other protocols well", () => {
    expect(fromUrl("ftp://user@www.example.com:8080/path?query")).toBe(
      "www.example.com",
    );
  });

  test("it accepts incomplete URLs", () => {
    expect(fromUrl("//user@www.example.com:8080/path?query")).toBe(
      "www.example.com",
    );
    expect(fromUrl("user@www.example.com:8080/path?query")).toBe(
      "www.example.com",
    );
    expect(fromUrl("@www.example.com:8080/path?query")).toBe("www.example.com");
    expect(fromUrl("www.example.com:8080/path?query")).toBe("www.example.com");
    expect(fromUrl("com:8080/path?query")).toBe("com");
    expect(fromUrl("com/?query")).toBe("com");
    expect(fromUrl("com?query")).toBe("com");
  });

  test("it returns the root domain for URLs with just the root domain", () => {
    expect(fromUrl(".:8080/path?query")).toBe(".");
    expect(fromUrl("./?query")).toBe(".");
    expect(fromUrl(".?query")).toBe(".");
  });

  test("it returns a puny-encoded hostname", () => {
    expect(fromUrl("http://münchen.de")).toBe("xn--mnchen-3ya.de");
    expect(fromUrl("münchen.de")).toBe("xn--mnchen-3ya.de");
  });

  test("it handles already puny-encoded hostnames well", () => {
    expect(fromUrl("http://xn--mnchen-3ya.de")).toBe("xn--mnchen-3ya.de");
    expect(fromUrl("xn--mnchen-3ya.de")).toBe("xn--mnchen-3ya.de");
  });

  test("it handles URLs with IPv4", () => {
    expect(fromUrl("http://192.168.1.1/path?query")).toBe("192.168.1.1");
    expect(fromUrl("//192.168.1.1")).toBe("192.168.1.1");
    expect(fromUrl("192.168.1.1")).toBe("192.168.1.1");
  });

  test("it handles URLs with IPv6", () => {
    expect(fromUrl("http://[1:2:3:4:5:6:7:8]/path?query")).toBe(
      "[1:2:3:4:5:6:7:8]",
    );
    expect(fromUrl("//[1:2:3:4:5:6:7:8]")).toBe("[1:2:3:4:5:6:7:8]");
    expect(fromUrl("[1:2:3:4:5:6:7:8]")).toBe("[1:2:3:4:5:6:7:8]");
  });

  // https://github.com/peerigon/parse-domain/issues/114
  test("it handles URLs with invalid IPv6", () => {
    expect(fromUrl("http://1:2:3:4:5:6:7:8/path?query")).toBe(
      "[1:2:3:4:5:6:7:8]",
    );
    expect(fromUrl("//1:2:3:4:5:6:7:8")).toBe("[1:2:3:4:5:6:7:8]");
    expect(fromUrl("1:2:3:4:5:6:7:8")).toBe("[1:2:3:4:5:6:7:8]");
  });

  // https://github.com/peerigon/parse-domain/issues/140
  test("it doesn't get confused with other : characters", () => {
    expect(
      fromUrl(
        "http://www.example.com/search?updated-max=2020-04-16T09:14:00+10:00",
      ),
    ).toBe("www.example.com");
  });

  test("it returns the NO_HOSTNAME symbol for invalid URLs", () => {
    expect(fromUrl(":8080/path?query")).toBe(NO_HOSTNAME);
    expect(fromUrl("/path?query")).toBe(NO_HOSTNAME);
    expect(fromUrl("?query")).toBe(NO_HOSTNAME);
    expect(fromUrl("")).toBe(NO_HOSTNAME);
  });

  test("it handles different schemes", () => {
    expect(fromUrl("android-app://com.org.example")).toBe("com.org.example");
    expect(fromUrl("file://root/.config")).toBe("root");
    expect(fromUrl("mailto://person@mail.com")).toBe("mail.com");
    expect(fromUrl("coap+ws://example.com")).toBe("example.com");
  });

  test("it returns the NO_HOSTNAME symbol for invalid input types", () => {
    // @ts-expect-error This is a deliberate error just for the test
    expect(fromUrl(undefined)).toBe(NO_HOSTNAME);
    // @ts-expect-error This is a deliberate error just for the test
    // eslint-disable-next-line no-null/no-null
    expect(fromUrl(null)).toBe(NO_HOSTNAME);
    // @ts-expect-error This is a deliberate error just for the test
    expect(fromUrl(true)).toBe(NO_HOSTNAME);
    // @ts-expect-error This is a deliberate error just for the test
    expect(fromUrl(1)).toBe(NO_HOSTNAME);
  });
});