text: var assert = require('assert');
  var express = require('express');
  var request = require('supertest');
  var proxy = require('../');
  
  describe('proxies headers', function() {
    'use strict';
    this.timeout(10000);
  
    var http;
  
    beforeEach(function() {
      http = express();
      http.use(proxy('http://httpbin.org', {
        headers: {
          'X-Current-president': 'taft'
        }
      }));
    });
  
    it('passed as options', function(done) {
      request(http)
        .get('/headers')
        .expect(200)
        .end(function(err, res) {
          if (err) { return done(err); }
          assert(res.body.headers['X-Current-President'] === 'taft');
          done();
        });
    });
  
    it('passed as on request', function(done) {
      request(http)
        .get('/headers')
        .set('X-Powerererer', 'XTYORG')
        .expect(200)
        .end(function(err, res) {
          if (err) { return done(err); }
          assert(res.body.headers['X-Powerererer']);
          done();
        });
    });
  
  });
  