bun.sh/test/bun.js/web-globals.test.js

import { unsafe } from "bun";
import { expect, it, test } from "bun:test";
import { withoutAggressiveGC } from "gc";

test("exists", () => {
  expect(typeof URL !== "undefined").toBe(true);
  expect(typeof URLSearchParams !== "undefined").toBe(true);
  expect(typeof DOMException !== "undefined").toBe(true);
  expect(typeof Event !== "undefined").toBe(true);
  expect(typeof EventTarget !== "undefined").toBe(true);
  expect(typeof AbortController !== "undefined").toBe(true);
  expect(typeof AbortSignal !== "undefined").toBe(true);
  expect(typeof CustomEvent !== "undefined").toBe(true);
  expect(typeof Headers !== "undefined").toBe(true);
  expect(typeof ErrorEvent !== "undefined").toBe(true);
  expect(typeof CloseEvent !== "undefined").toBe(true);
  expect(typeof MessageEvent !== "undefined").toBe(true);
  expect(typeof TextEncoder !== "undefined").toBe(true);
  expect(typeof WebSocket !== "undefined").toBe(true);
  expect(typeof Blob !== "undefined").toBe(true);
});

test("CloseEvent", () => {
  var event = new CloseEvent("close", { reason: "world" });
  expect(event.type).toBe("close");
  const target = new EventTarget();
  var called = false;
  target.addEventListener("close", ({ type, reason }) => {
    expect(type).toBe("close");
    expect(reason).toBe("world");
    called = true;
  });
  target.dispatchEvent(event);
  expect(called).toBe(true);
});

test("MessageEvent", () => {
  var event = new MessageEvent("message", { data: "world" });
  expect(event.type).toBe("message");
  const target = new EventTarget();
  var called = false;
  target.addEventListener("message", ({ type, data }) => {
    expect(type).toBe("message");
    expect(data).toBe("world");
    called = true;
  });
  target.dispatchEvent(event);
  expect(called).toBe(true);
});

it("crypto.getRandomValues", () => {
  var foo = new Uint8Array(32);

  // run it once buffered and unbuffered
  {
    var array = crypto.getRandomValues(foo);
    expect(array).toBe(foo);
    expect(array.reduce((sum, a) => (sum += a === 0), 0) != foo.length).toBe(
      true,
    );
  }

  // disable it for this block because it tends to get stuck here running the GC forever
  withoutAggressiveGC(() => {
    // run it again to check that the fast path works
    for (var i = 0; i < 9000; i++) {
      var array = crypto.getRandomValues(foo);
      expect(array).toBe(foo);
    }
  });

  // run it on a large input
  expect(
    !!crypto.getRandomValues(new Uint8Array(8096)).find((a) => a > 0),
  ).toBe(true);

  {
    // any additional input into getRandomValues() makes it unbuffered
    var array = crypto.getRandomValues(foo, "unbuffered");
    expect(array).toBe(foo);
    expect(array.reduce((sum, a) => (sum += a === 0), 0) != foo.length).toBe(
      true,
    );
  }
});

// not actually a web global
it("crypto.timingSafeEqual", () => {
  const crypto = import.meta.require("node:crypto");
  var uuidStr = crypto.randomUUID();
  expect(uuidStr.length).toBe(36);
  expect(uuidStr[8]).toBe("-");
  expect(uuidStr[13]).toBe("-");
  expect(uuidStr[18]).toBe("-");
  expect(uuidStr[23]).toBe("-");
  const uuid = Buffer.from(uuidStr);

  expect(crypto.timingSafeEqual(uuid, uuid)).toBe(true);
  expect(crypto.timingSafeEqual(uuid, uuid.slice())).toBe(true);
  try {
    crypto.timingSafeEqual(uuid, uuid.slice(1));
    expect(false).toBe(true);
  } catch (e) {}

  try {
    crypto.timingSafeEqual(uuid, uuid.slice(0, uuid.length - 2));
    expect(false).toBe(true);
  } catch (e) {
    expect(e.message).toBe("Input buffers must have the same length");
  }

  try {
    expect(crypto.timingSafeEqual(uuid, crypto.randomUUID())).toBe(false);
    expect(false).toBe(true);
  } catch (e) {
    expect(e.name).toBe("TypeError");
  }

  var shorter = uuid.slice(0, 1);
  for (let i = 0; i < 9000; i++) {
    if (!crypto.timingSafeEqual(shorter, shorter)) throw new Error("fail");
  }
});

it("crypto.randomUUID", () => {
  var uuid = crypto.randomUUID();
  expect(uuid.length).toBe(36);
  expect(uuid[8]).toBe("-");
  expect(uuid[13]).toBe("-");
  expect(uuid[18]).toBe("-");
  expect(uuid[23]).toBe("-");

  withoutAggressiveGC(() => {
    // check that the fast path works
    for (let i = 0; i < 9000; i++) {
      var uuid2 = crypto.randomUUID();
      expect(uuid2.length).toBe(36);
      expect(uuid2[8]).toBe("-");
      expect(uuid2[13]).toBe("-");
      expect(uuid2[18]).toBe("-");
      expect(uuid2[23]).toBe("-");
    }
  });
});

it("URL.prototype.origin", () => {
  const url = new URL("https://html.spec.whatwg.org/");
  const { origin, host, hostname } = url;

  expect(hostname).toBe("html.spec.whatwg.org");
  expect(host).toBe("html.spec.whatwg.org");
  expect(origin).toBe("https://html.spec.whatwg.org");
});

test("navigator", () => {
  expect(globalThis.navigator !== undefined).toBe(true);
  const version = process.versions.bun;
  const userAgent = `Bun/${version}`;
  expect(navigator.hardwareConcurrency > 0).toBe(true);
  expect(navigator.userAgent).toBe(userAgent);
});