bun.sh/test/js/bun/util/BunObject.test.ts

import { env } from "bun";
import { hasNonReifiedStatic } from "bun:internal-for-testing";
import { expect, test } from "bun:test";
test("hasNonReifiedStatic", () => {
  expect(hasNonReifiedStatic(Bun), "do not eagerly initialize the Bun object. This will make Bun much slower.").toBe(
    true,
  );
  expect(env.a).toBeUndefined();
  expect(hasNonReifiedStatic(Bun), "do not eagerly initialize the Bun object. This will make Bun much slower.").toBe(
    true,
  );
  const a = { ...Bun };
  globalThis.a = a;
  expect(hasNonReifiedStatic(Bun)).toBe(false);
});

test("require('bun')", () => {
  const str = eval("'bun'");
  expect(require(str)).toBe(Bun);
});

test("await import('bun')", async () => {
  const str = eval("'bun'");
  const BunESM = await import(str);

  // console.log it so that we iterate through all the fields and crash if it's
  // in an unexpected state.
  console.log(BunESM);

  for (let property in Bun) {
    expect(BunESM).toHaveProperty(property);
    expect(BunESM[property]).toBe(Bun[property]);
  }
  expect(BunESM.default).toBe(Bun);
});