setup.js

var nock = require('nock');

nock.enableNetConnect('127.0.0.1');

function echoheaders(origin) {
  nock(origin)
    .persist()
    .get('/echoheaders')
    .reply(function() {
      var headers = this.req.headers;
      var excluded_headers = [
        'accept-encoding',
        'user-agent',
        'connection',
        // Remove this header since its value is platform-specific.
        'x-forwarded-for',
        'test-include-xfwd',
      ];
      if (!('test-include-xfwd' in headers)) {
        excluded_headers.push('x-forwarded-port');
        excluded_headers.push('x-forwarded-proto');
      }
      var response = {};
      Object.keys(headers).forEach(function(name) {
        if (excluded_headers.indexOf(name) === -1) {
          response[name] = headers[name];
        }
      });
      return response;
    });
}

nock('http://example.com')
  .persist()
  .get('/')
  .reply(200, 'Response from example.com')

  .post('/echopost')
  .reply(200, function(uri, requestBody) {
    return requestBody;
  })

  .get('/setcookie')
  .reply(200, '', {
    'Set-Cookie': 'x',
    'Set-Cookie2': 'y',
    'Set-Cookie3': 'z', // This is not a special cookie setting header.
  })

  .get('/redirecttarget')
  .reply(200, 'redirect target', {
    'Some-header': 'value',
  })

  .head('/redirect')
  .reply(302, '', {
    Location: '/redirecttarget',
  })

  .get('/redirect')
  .reply(302, 'redirecting...', {
    'header at redirect': 'should not be here',
    Location: '/redirecttarget',
  })

  .get('/redirectposttarget')
  .reply(200, 'post target')

  .post('/redirectposttarget')
  .reply(200, 'post target (POST)')

  .post('/redirectpost')
  .reply(302, 'redirecting...', {
    Location: '/redirectposttarget',
  })

  .post('/redirect307')
  .reply(307, 'redirecting...', {
    Location: '/redirectposttarget',
  })

  .get('/redirect2redirect')
  .reply(302, 'redirecting to redirect...', {
    Location: '/redirect',
  })

  .get('/redirectloop')
  .reply(302, 'redirecting ad infinitum...', {
    Location: '/redirectloop',
  })

  .get('/redirectwithoutlocation')
  .reply(302, 'maybe found')

  .get('/proxyerror')
  .replyWithError('throw node')
;

nock('https://example.com')
  .persist()
  .get('/')
  .reply(200, 'Response from https://example.com')
;

echoheaders('http://example.com');
echoheaders('http://example.com:1337');
echoheaders('https://example.com');
echoheaders('https://example.com:1337');

nock('http://robots.txt')
  .get('/')
  .reply(200, 'this is http://robots.txt');