bun.sh/test/js/node/parallel/test-http.js

const common = require('../common');
const assert = require('assert');
const http = require('http');
const url = require('url');

const expectedRequests = ['/hello', '/there', '/world'];

const server = http.Server(common.mustCall((req, res) => {
  assert.strictEqual(expectedRequests.shift(), req.url);

  switch (req.url) {
    case '/hello':
      assert.strictEqual(req.method, 'GET');
      assert.strictEqual(req.headers.accept, '*/*');
      assert.strictEqual(req.headers.foo, 'bar');
      assert.strictEqual(req.headers.cookie, 'foo=bar; bar=baz; baz=quux');
      break;
    case '/there':
      assert.strictEqual(req.method, 'PUT');
      assert.strictEqual(req.headers.cookie, 'node=awesome; ta=da');
      break;
    case '/world':
      assert.strictEqual(req.method, 'POST');
      assert.strictEqual(req.headers.cookie, 'abc=123; def=456; ghi=789');
      break;
    default:
      assert(false, `Unexpected request for ${req.url}`);
  }

  if (expectedRequests.length === 0)
    server.close();

  req.on('end', () => {
    res.writeHead(200, { 'Content-Type': 'text/plain' });
    res.write(`The path was ${url.parse(req.url).pathname}`);
    res.end();
  });
  req.resume();
}, 3));
server.listen(0);

server.on('listening', () => {
  const agent = new http.Agent({ port: server.address().port, maxSockets: 1 });
  const req = http.get({
    port: server.address().port,
    path: '/hello',
    headers: {
      Accept: '*/*',
      Foo: 'bar',
      Cookie: [ 'foo=bar', 'bar=baz', 'baz=quux' ]
    },
    agent: agent
  }, common.mustCall((res) => {
    const cookieHeaders = req._header.match(/^Cookie: .+$/img);
    assert.deepStrictEqual(cookieHeaders,
                           ['Cookie: foo=bar; bar=baz; baz=quux']);
    assert.strictEqual(res.statusCode, 200);
    let body = '';
    res.setEncoding('utf8');
    res.on('data', (chunk) => { body += chunk; });
    res.on('end', common.mustCall(() => {
      assert.strictEqual(body, 'The path was /hello');
    }));
  }));

  setTimeout(common.mustCall(() => {
    const req = http.request({
      port: server.address().port,
      method: 'PUT',
      path: '/there',
      agent: agent
    }, common.mustCall((res) => {
      const cookieHeaders = req._header.match(/^Cookie: .+$/img);
      assert.deepStrictEqual(cookieHeaders, ['Cookie: node=awesome; ta=da']);
      assert.strictEqual(res.statusCode, 200);
      let body = '';
      res.setEncoding('utf8');
      res.on('data', (chunk) => { body += chunk; });
      res.on('end', common.mustCall(() => {
        assert.strictEqual(body, 'The path was /there');
      }));
    }));
    req.setHeader('Cookie', ['node=awesome', 'ta=da']);
    req.end();
  }), 1);

  setTimeout(common.mustCall(() => {
    const req = http.request({
      port: server.address().port,
      method: 'POST',
      path: '/world',
      headers: [ ['Cookie', 'abc=123'],
                 ['Cookie', 'def=456'],
                 ['Cookie', 'ghi=789'],
                 ['Host', 'example.com'],
               ],
      agent: agent
    }, common.mustCall((res) => {
      const cookieHeaders = req._header.match(/^Cookie: .+$/img);
      assert.deepStrictEqual(cookieHeaders,
                             ['Cookie: abc=123',
                              'Cookie: def=456',
                              'Cookie: ghi=789']);
      assert.strictEqual(res.statusCode, 200);
      let body = '';
      res.setEncoding('utf8');
      res.on('data', (chunk) => { body += chunk; });
      res.on('end', common.mustCall(() => {
        assert.strictEqual(body, 'The path was /world');
      }));
    }));
    req.end();
  }), 2);
});