bun.sh/test/js/web/fetch/response.test.ts

import { describe, test, expect } from "bun:test";

test("zero args returns an otherwise empty 200 response", () => {
  const response = new Response();
  expect(response.status).toBe(200);
  expect(response.statusText).toBe("");
});

test("undefined args don't throw", () => {
  const response = new Response("", {
    status: undefined,
    statusText: undefined,
    headers: undefined,
  });
  expect(response.status).toBe(200);
  expect(response.statusText).toBe("");
});

test("1-arg form returns a 200 response", () => {
  const response = new Response("body text");

  expect(response.status).toBe(200);
  expect(response.statusText).toBe("");
});

describe("2-arg form", () => {
  test("can fill in status/statusText, and it works", () => {
    const response = new Response("body text", {
      status: 202,
      statusText: "Accepted.",
    });

    expect(response.status).toBe(202);
    expect(response.statusText).toBe("Accepted.");
  });
  test('empty object continues to return 200/""', () => {
    const response = new Response("body text", {});

    expect(response.status).toBe(200);
    expect(response.statusText).toBe("");
  });
});