supertest.js

'use strict';

const https = require('https');
let http2;
try {
  http2 = require('http2'); // eslint-disable-line global-require
} catch (_) {
  // eslint-disable-line no-empty
}
const fs = require('fs');
const path = require('path');
const should = require('should');
const express = require('express');
const bodyParser = require('body-parser');
const cookieParser = require('cookie-parser');
const nock = require('nock');
const request = require('../index.js');
const throwError = require('./throwError');

process.env.NODE_TLS_REJECT_UNAUTHORIZED = '0';

function shouldIncludeStackWithThisFile(err) {
  err.stack.should.match(/test\/supertest.js:/);
  err.stack.should.startWith(err.name + ':');
}

describe('request(url)', function () {
  it('should be supported', function (done) {
    const app = express();
    let server;

    app.get('/', function (req, res) {
      res.send('hello');
    });

    server = app.listen(function () {
      const url = 'http://localhost:' + server.address().port;
      request(url)
        .get('/')
        .expect('hello', done);
    });
  });

  describe('.end(cb)', function () {
    it('should set `this` to the test object when calling cb', function (done) {
      const app = express();
      let server;

      app.get('/', function (req, res) {
        res.send('hello');
      });

      server = app.listen(function () {
        const url = 'http://localhost:' + server.address().port;
        const test = request(url).get('/');
        test.end(function (err, res) {
          this.should.eql(test);
          done();
        });
      });
    });
  });
});

describe('request(app)', function () {
  it('should fire up the app on an ephemeral port', function (done) {
    const app = express();

    app.get('/', function (req, res) {
      res.send('hey');
    });

    request(app)
      .get('/')
      .end(function (err, res) {
        res.status.should.equal(200);
        res.text.should.equal('hey');
        done();
      });
  });

  it('should work with an active server', function (done) {
    const app = express();
    let server;

    app.get('/', function (req, res) {
      res.send('hey');
    });

    server = app.listen(function () {
      request(server)
        .get('/')
        .end(function (err, res) {
          res.status.should.equal(200);
          res.text.should.equal('hey');
          done();
        });
    });
  });

  it('should work with remote server', function (done) {
    const app = express();
    let server;

    app.get('/', function (req, res) {
      res.send('hey');
    });

    server = app.listen(function () {
      const url = 'http://localhost:' + server.address().port;
      request(url)
        .get('/')
        .end(function (err, res) {
          res.status.should.equal(200);
          res.text.should.equal('hey');
          done();
        });
    });
  });

  it('should work with a https server', function (done) {
    const app = express();
    const fixtures = path.join(__dirname, 'fixtures');
    const server = https.createServer({
      key: fs.readFileSync(path.join(fixtures, 'test_key.pem')),
      cert: fs.readFileSync(path.join(fixtures, 'test_cert.pem'))
    }, app);

    app.get('/', function (req, res) {
      res.send('hey');
    });

    request(server)
      .get('/')
      .end(function (err, res) {
        if (err) return done(err);
        res.status.should.equal(200);
        res.text.should.equal('hey');
        done();
      });
  });

  it('should work with .send() etc', function (done) {
    const app = express();

    app.use(bodyParser.json());

    app.post('/', function (req, res) {
      res.send(req.body.name);
    });

    request(app)
      .post('/')
      .send({ name: 'john' })
      .expect('john', done);
  });

  it('should work when unbuffered', function (done) {
    const app = express();

    app.get('/', function (req, res) {
      res.end('Hello');
    });

    request(app)
      .get('/')
      .expect('Hello', done);
  });

  it('should default redirects to 0', function (done) {
    const app = express();

    app.get('/', function (req, res) {
      res.redirect('/login');
    });

    request(app)
      .get('/')
      .expect(302, done);
  });

  it('should handle redirects', function (done) {
    const app = express();

    app.get('/login', function (req, res) {
      res.end('Login');
    });

    app.get('/', function (req, res) {
      res.redirect('/login');
    });

    request(app)
      .get('/')
      .redirects(1)
      .end(function (err, res) {
        should.exist(res);
        res.status.should.be.equal(200);
        res.text.should.be.equal('Login');
        done();
      });
  });

  it('should handle socket errors', function (done) {
    const app = express();

    app.get('/', function (req, res) {
      res.destroy();
    });

    request(app)
      .get('/')
      .end(function (err) {
        should.exist(err);
        done();
      });
  });

  describe('.end(fn)', function () {
    it('should close server', function (done) {
      const app = express();
      let test;

      app.get('/', function (req, res) {
        res.send('supertest FTW!');
      });

      test = request(app)
        .get('/')
        .end(function () {
        });

      test._server.on('close', function () {
        done();
      });
    });

    it('should wait for server to close before invoking fn', function (done) {
      const app = express();
      let closed = false;
      let test;

      app.get('/', function (req, res) {
        res.send('supertest FTW!');
      });

      test = request(app)
        .get('/')
        .end(function () {
          closed.should.be.true;
          done();
        });

      test._server.on('close', function () {
        closed = true;
      });
    });

    it('should support nested requests', function (done) {
      const app = express();
      const test = request(app);

      app.get('/', function (req, res) {
        res.send('supertest FTW!');
      });

      test
        .get('/')
        .end(function () {
          test
            .get('/')
            .end(function (err, res) {
              (err === null).should.be.true;
              res.status.should.equal(200);
              res.text.should.equal('supertest FTW!');
              done();
            });
        });
    });

    it('should include the response in the error callback', function (done) {
      const app = express();

      app.get('/', function (req, res) {
        res.send('whatever');
      });

      request(app)
        .get('/')
        .expect(function () {
          throw new Error('Some error');
        })
        .end(function (err, res) {
          should.exist(err);
          should.exist(res);
          // Duck-typing response, just in case.
          res.status.should.equal(200);
          done();
        });
    });

    it('should set `this` to the test object when calling the error callback', function (done) {
      const app = express();
      let test;

      app.get('/', function (req, res) {
        res.send('whatever');
      });

      test = request(app).get('/');
      test.expect(function () {
        throw new Error('Some error');
      }).end(function (err, res) {
        should.exist(err);
        this.should.eql(test);
        done();
      });
    });

    it('should handle an undefined Response', function (done) {
      const app = express();
      let server;

      app.get('/', function (req, res) {
        setTimeout(function () {
          res.end();
        }, 20);
      });

      server = app.listen(function () {
        const url = 'http://localhost:' + server.address().port;
        request(url)
          .get('/')
          .timeout(1)
          .expect(200, function (err) {
            err.should.be.an.instanceof(Error);
            return done();
          });
      });
    });

    it('should handle error returned when server goes down', function (done) {
      const app = express();
      let server;

      app.get('/', function (req, res) {
        res.end();
      });

      server = app.listen(function () {
        const url = 'http://localhost:' + server.address().port;
        server.close();
        request(url)
          .get('/')
          .expect(200, function (err) {
            err.should.be.an.instanceof(Error);
            return done();
          });
      });
    });
  });

  describe('.expect(status[, fn])', function () {
    it('should assert the response status', function (done) {
      const app = express();

      app.get('/', function (req, res) {
        res.send('hey');
      });

      request(app)
        .get('/')
        .expect(404)
        .end(function (err, res) {
          err.message.should.equal('expected 404 "Not Found", got 200 "OK"');
          shouldIncludeStackWithThisFile(err);
          done();
        });
    });
  });

  describe('.expect(status)', function () {
    it('should handle connection error', function (done) {
      const req = request.agent('http://localhost:1234');

      req
        .get('/')
        .expect(200)
        .end(function (err, res) {
          err.message.should.equal('ECONNREFUSED: Connection refused');
          done();
        });
    });
  });

  describe('.expect(status)', function () {
    it('should assert only status', function (done) {
      const app = express();

      app.get('/', function (req, res) {
        res.send('hey');
      });

      request(app)
        .get('/')
        .expect(200)
        .end(done);
    });
  });

  describe('.expect(statusArray)', function () {
    it('should assert only status', function (done) {
      const app = express();

      app.get('/', function (req, res) {
        res.send('hey');
      });

      request(app)
        .get('/')
        .expect([200, 404])
        .end(done);
    });

    it('should reject if status is not in valid statuses array', function (done) {
      const app = express();

      app.get('/', function (req, res) {
        res.send('hey');
      });

      request(app)
        .get('/')
        .expect([500, 404])
        .end(function (err, res) {
          err.message.should.equal('expected one of "500, 404", got 200 "OK"');
          shouldIncludeStackWithThisFile(err);
          done();
        });
    });
  });

  describe('.expect(status, body[, fn])', function () {
    it('should assert the response body and status', function (done) {
      const app = express();

      app.get('/', function (req, res) {
        res.send('foo');
      });

      request(app)
        .get('/')
        .expect(200, 'foo', done);
    });

    describe('when the body argument is an empty string', function () {
      it('should not quietly pass on failure', function (done) {
        const app = express();

        app.get('/', function (req, res) {
          res.send('foo');
        });

        request(app)
          .get('/')
          .expect(200, '')
          .end(function (err, res) {
            err.message.should.equal('expected \'\' response body, got \'foo\'');
            shouldIncludeStackWithThisFile(err);
            done();
          });
      });
    });
  });

  describe('.expect(body[, fn])', function () {
    it('should assert the response body', function (done) {
      const app = express();

      app.set('json spaces', 0);

      app.get('/', function (req, res) {
        res.send({ foo: 'bar' });
      });

      request(app)
        .get('/')
        .expect('hey')
        .end(function (err, res) {
          err.message.should.equal('expected \'hey\' response body, got \'{"foo":"bar"}\'');
          shouldIncludeStackWithThisFile(err);
          done();
        });
    });

    it('should assert the status before the body', function (done) {
      const app = express();

      app.set('json spaces', 0);

      app.get('/', function (req, res) {
        res.status(500).send({ message: 'something went wrong' });
      });

      request(app)
        .get('/')
        .expect(200)
        .expect('hey')
        .end(function (err, res) {
          err.message.should.equal('expected 200 "OK", got 500 "Internal Server Error"');
          shouldIncludeStackWithThisFile(err);
          done();
        });
    });

    it('should assert the response text', function (done) {
      const app = express();

      app.set('json spaces', 0);

      app.get('/', function (req, res) {
        res.send({ foo: 'bar' });
      });

      request(app)
        .get('/')
        .expect('{"foo":"bar"}', done);
    });

    it('should assert the parsed response body', function (done) {
      const app = express();

      app.set('json spaces', 0);

      app.get('/', function (req, res) {
        res.send({ foo: 'bar' });
      });

      request(app)
        .get('/')
        .expect({ foo: 'baz' })
        .end(function (err, res) {
          err.message.should.equal('expected { foo: \'baz\' } response body, got { foo: \'bar\' }');
          shouldIncludeStackWithThisFile(err);

          request(app)
            .get('/')
            .expect({ foo: 'bar' })
            .end(done);
        });
    });

    it('should test response object types', function (done) {
      const app = express();
      app.get('/', function (req, res) {
        res.status(200).json({ stringValue: 'foo', numberValue: 3 });
      });

      request(app)
        .get('/')
        .expect({ stringValue: 'foo', numberValue: 3 }, done);
    });

    it('should deep test response object types', function (done) {
      const app = express();
      app.get('/', function (req, res) {
        res.status(200)
          .json({ stringValue: 'foo', numberValue: 3, nestedObject: { innerString: '5' } });
      });

      request(app)
        .get('/')
        .expect({ stringValue: 'foo', numberValue: 3, nestedObject: { innerString: 5 } })
        .end(function (err, res) {
          err.message.replace(/[^a-zA-Z]/g, '').should.equal('expected {\n  stringValue: \'foo\',\n  numberValue: 3,\n  nestedObject: { innerString: 5 }\n} response body, got {\n  stringValue: \'foo\',\n  numberValue: 3,\n  nestedObject: { innerString: \'5\' }\n}'.replace(/[^a-zA-Z]/g, '')); // eslint-disable-line max-len
          shouldIncludeStackWithThisFile(err);

          request(app)
            .get('/')
            .expect({ stringValue: 'foo', numberValue: 3, nestedObject: { innerString: '5' } })
            .end(done);
        });
    });

    it('should support parsed response arrays', function (done) {
      const app = express();
      app.get('/', function (req, res) {
        res.status(200).json(['a', { id: 1 }]);
      });

      request(app)
        .get('/')
        .expect(['a', { id: 1 }], done);
    });

    it('should support empty array responses', function (done) {
      const app = express();
      app.get('/', function (req, res) {
        res.status(200).json([]);
      });

      request(app)
        .get('/')
        .expect([], done);
    });

    it('should support regular expressions', function (done) {
      const app = express();

      app.get('/', function (req, res) {
        res.send('foobar');
      });

      request(app)
        .get('/')
        .expect(/^bar/)
        .end(function (err, res) {
          err.message.should.equal('expected body \'foobar\' to match /^bar/');
          shouldIncludeStackWithThisFile(err);
          done();
        });
    });

    it('should assert response body multiple times', function (done) {
      const app = express();

      app.get('/', function (req, res) {
        res.send('hey tj');
      });

      request(app)
        .get('/')
        .expect(/tj/)
        .expect('hey')
        .expect('hey tj')
        .end(function (err, res) {
          err.message.should.equal("expected 'hey' response body, got 'hey tj'");
          shouldIncludeStackWithThisFile(err);
          done();
        });
    });

    it('should assert response body multiple times with no exception', function (done) {
      const app = express();

      app.get('/', function (req, res) {
        res.send('hey tj');
      });

      request(app)
        .get('/')
        .expect(/tj/)
        .expect(/^hey/)
        .expect('hey tj', done);
    });
  });

  describe('.expect(field, value[, fn])', function () {
    it('should assert the header field presence', function (done) {
      const app = express();

      app.get('/', function (req, res) {
        res.send({ foo: 'bar' });
      });

      request(app)
        .get('/')
        .expect('Content-Foo', 'bar')
        .end(function (err, res) {
          err.message.should.equal('expected "Content-Foo" header field');
          shouldIncludeStackWithThisFile(err);
          done();
        });
    });

    it('should assert the header field value', function (done) {
      const app = express();

      app.get('/', function (req, res) {
        res.send({ foo: 'bar' });
      });

      request(app)
        .get('/')
        .expect('Content-Type', 'text/html')
        .end(function (err, res) {
          err.message.should.equal('expected "Content-Type" of "text/html", '
            + 'got "application/json; charset=utf-8"');
          shouldIncludeStackWithThisFile(err);
          done();
        });
    });

    it('should assert multiple fields', function (done) {
      const app = express();

      app.get('/', function (req, res) {
        res.send('hey');
      });

      request(app)
        .get('/')
        .expect('Content-Type', 'text/html; charset=utf-8')
        .expect('Content-Length', '3')
        .end(done);
    });

    it('should support regular expressions', function (done) {
      const app = express();

      app.get('/', function (req, res) {
        res.send('hey');
      });

      request(app)
        .get('/')
        .expect('Content-Type', /^application/)
        .end(function (err) {
          err.message.should.equal('expected "Content-Type" matching /^application/, '
            + 'got "text/html; charset=utf-8"');
          shouldIncludeStackWithThisFile(err);
          done();
        });
    });

    it('should support numbers', function (done) {
      const app = express();

      app.get('/', function (req, res) {
        res.send('hey');
      });

      request(app)
        .get('/')
        .expect('Content-Length', 4)
        .end(function (err) {
          err.message.should.equal('expected "Content-Length" of "4", got "3"');
          shouldIncludeStackWithThisFile(err);
          done();
        });
    });

    describe('handling arbitrary expect functions', function () {
      let app;
      let get;

      before(function () {
        app = express();
        app.get('/', function (req, res) {
          res.send('hey');
        });
      });

      beforeEach(function () {
        get = request(app).get('/');
      });

      it('reports errors', function (done) {
        get
          .expect(throwError('failed'))
          .end(function (err) {
            err.message.should.equal('failed');
            shouldIncludeStackWithThisFile(err);
            done();
          });
      });

      it(
        'ensures truthy non-errors returned from asserts are not promoted to errors',
        function (done) {
          get
            .expect(function (res) {
              return 'some descriptive error';
            })
            .end(function (err) {
              should.not.exist(err);
              done();
            });
        }
      );

      it('ensures truthy errors returned from asserts are throw to end', function (done) {
        get
          .expect(throwError('some descriptive error'))
          .end(function (err) {
            err.message.should.equal('some descriptive error');
            shouldIncludeStackWithThisFile(err);
            (err instanceof Error).should.be.true;
            done();
          });
      });

      it("doesn't create false negatives", function (done) {
        get
          .expect(function (res) {
          })
          .end(done);
      });

      it("doesn't create false negatives on non error objects", function (done) {
        const handler = {
          get: function(target, prop, receiver) {
            throw Error('Should not be called for non Error objects');
          }
        };
        const proxy = new Proxy({}, handler); // eslint-disable-line no-undef
        get
          .expect(() => proxy)
          .end(done);
      });

      it('handles multiple asserts', function (done) {
        const calls = [];
        get
          .expect(function (res) {
            calls[0] = 1;
          })
          .expect(function (res) {
            calls[1] = 1;
          })
          .expect(function (res) {
            calls[2] = 1;
          })
          .end(function () {
            const callCount = [0, 1, 2].reduce(function (count, i) {
              return count + calls[i];
            }, 0);
            callCount.should.equal(3, "didn't see all assertions run");
            done();
          });
      });

      it('plays well with normal assertions - no false positives', function (done) {
        get
          .expect(function (res) {
          })
          .expect('Content-Type', /json/)
          .end(function (err) {
            err.message.should.match(/Content-Type/);
            shouldIncludeStackWithThisFile(err);
            done();
          });
      });

      it('plays well with normal assertions - no false negatives', function (done) {
        get
          .expect(function (res) {
          })
          .expect('Content-Type', /html/)
          .expect(function (res) {
          })
          .expect('Content-Type', /text/)
          .end(done);
      });
    });

    describe('handling multiple assertions per field', function () {
      it('should work', function (done) {
        const app = express();
        app.get('/', function (req, res) {
          res.send('hey');
        });

        request(app)
          .get('/')
          .expect('Content-Type', /text/)
          .expect('Content-Type', /html/)
          .end(done);
      });

      it('should return an error if the first one fails', function (done) {
        const app = express();
        app.get('/', function (req, res) {
          res.send('hey');
        });

        request(app)
          .get('/')
          .expect('Content-Type', /bloop/)
          .expect('Content-Type', /html/)
          .end(function (err) {
            err.message.should.equal('expected "Content-Type" matching /bloop/, '
              + 'got "text/html; charset=utf-8"');
            shouldIncludeStackWithThisFile(err);
            done();
          });
      });

      it('should return an error if a middle one fails', function (done) {
        const app = express();
        app.get('/', function (req, res) {
          res.send('hey');
        });

        request(app)
          .get('/')
          .expect('Content-Type', /text/)
          .expect('Content-Type', /bloop/)
          .expect('Content-Type', /html/)
          .end(function (err) {
            err.message.should.equal('expected "Content-Type" matching /bloop/, '
              + 'got "text/html; charset=utf-8"');
            shouldIncludeStackWithThisFile(err);
            done();
          });
      });

      it('should return an error if the last one fails', function (done) {
        const app = express();
        app.get('/', function (req, res) {
          res.send('hey');
        });

        request(app)
          .get('/')
          .expect('Content-Type', /text/)
          .expect('Content-Type', /html/)
          .expect('Content-Type', /bloop/)
          .end(function (err) {
            err.message.should.equal('expected "Content-Type" matching /bloop/, '
              + 'got "text/html; charset=utf-8"');
            shouldIncludeStackWithThisFile(err);
            done();
          });
      });
    });
  });
});

describe('request.agent(app)', function () {
  const app = express();
  const agent = request.agent(app)
    .set('header', 'hey');

  app.use(cookieParser());

  app.get('/', function (req, res) {
    res.cookie('cookie', 'hey');
    res.send();
  });

  app.get('/return_cookies', function (req, res) {
    if (req.cookies.cookie) res.send(req.cookies.cookie);
    else res.send(':(');
  });

  app.get('/return_headers', function (req, res) {
    if (req.get('header')) res.send(req.get('header'));
    else res.send(':(');
  });

  it('should save cookies', function (done) {
    agent
      .get('/')
      .expect('set-cookie', 'cookie=hey; Path=/', done);
  });

  it('should send cookies', function (done) {
    agent
      .get('/return_cookies')
      .expect('hey', done);
  });

  it('should send global agent headers', function (done) {
    agent
      .get('/return_headers')
      .expect('hey', done);
  });
});

describe('agent.host(host)', function () {
  it('should set request hostname', function (done) {
    const app = express();
    const agent = request.agent(app);

    app.get('/', function (req, res) {
      res.send({ hostname: req.hostname });
    });

    agent
      .host('something.test')
      .get('/')
      .end(function (err, res) {
        if (err) return done(err);
        res.body.hostname.should.equal('something.test');
        done();
      });
  });
});

describe('.<http verb> works as expected', function () {
  it('.delete should work', function (done) {
    const app = express();
    app.delete('/', function (req, res) {
      res.sendStatus(200);
    });

    request(app)
      .delete('/')
      .expect(200, done);
  });
  it('.del should work', function (done) {
    const app = express();
    app.delete('/', function (req, res) {
      res.sendStatus(200);
    });

    request(app)
      .del('/')
      .expect(200, done);
  });
  it('.get should work', function (done) {
    const app = express();
    app.get('/', function (req, res) {
      res.sendStatus(200);
    });

    request(app)
      .get('/')
      .expect(200, done);
  });
  it('.post should work', function (done) {
    const app = express();
    app.post('/', function (req, res) {
      res.sendStatus(200);
    });

    request(app)
      .post('/')
      .expect(200, done);
  });
  it('.put should work', function (done) {
    const app = express();
    app.put('/', function (req, res) {
      res.sendStatus(200);
    });

    request(app)
      .put('/')
      .expect(200, done);
  });
  it('.head should work', function (done) {
    const app = express();
    app.head('/', function (req, res) {
      res.statusCode = 200;
      res.set('Content-Encoding', 'gzip');
      res.set('Content-Length', '1024');
      res.status(200);
      res.end();
    });

    request(app)
      .head('/')
      .set('accept-encoding', 'gzip, deflate')
      .end(function (err, res) {
        if (err) return done(err);
        res.should.have.property('statusCode', 200);
        res.headers.should.have.property('content-length', '1024');
        done();
      });
  });
});

describe('assert ordering by call order', function () {
  it('should assert the body before status', function (done) {
    const app = express();

    app.set('json spaces', 0);

    app.get('/', function (req, res) {
      res.status(500).json({ message: 'something went wrong' });
    });

    request(app)
      .get('/')
      .expect('hey')
      .expect(200)
      .end(function (err, res) {
        err.message.should.equal('expected \'hey\' response body, '
          + 'got \'{"message":"something went wrong"}\'');
        shouldIncludeStackWithThisFile(err);
        done();
      });
  });

  it('should assert the status before body', function (done) {
    const app = express();

    app.set('json spaces', 0);

    app.get('/', function (req, res) {
      res.status(500).json({ message: 'something went wrong' });
    });

    request(app)
      .get('/')
      .expect(200)
      .expect('hey')
      .end(function (err, res) {
        err.message.should.equal('expected 200 "OK", got 500 "Internal Server Error"');
        shouldIncludeStackWithThisFile(err);
        done();
      });
  });

  it('should assert the fields before body and status', function (done) {
    const app = express();

    app.set('json spaces', 0);

    app.get('/', function (req, res) {
      res.status(200).json({ hello: 'world' });
    });

    request(app)
      .get('/')
      .expect('content-type', /html/)
      .expect('hello')
      .end(function (err, res) {
        err.message.should.equal('expected "content-type" matching /html/, '
          + 'got "application/json; charset=utf-8"');
        shouldIncludeStackWithThisFile(err);
        done();
      });
  });

  it('should call the expect function in order', function (done) {
    const app = express();

    app.get('/', function (req, res) {
      res.status(200).json({});
    });

    request(app)
      .get('/')
      .expect(function (res) {
        res.body.first = 1;
      })
      .expect(function (res) {
        (res.body.first === 1).should.be.true;
        res.body.second = 2;
      })
      .end(function (err, res) {
        if (err) return done(err);
        (res.body.first === 1).should.be.true;
        (res.body.second === 2).should.be.true;
        done();
      });
  });

  it('should call expect(fn) and expect(status, fn) in order', function (done) {
    const app = express();

    app.get('/', function (req, res) {
      res.status(200).json({});
    });

    request(app)
      .get('/')
      .expect(function (res) {
        res.body.first = 1;
      })
      .expect(200, function (err, res) {
        (err === null).should.be.true;
        (res.body.first === 1).should.be.true;
        done();
      });
  });

  it('should call expect(fn) and expect(header,value) in order', function (done) {
    const app = express();

    app.get('/', function (req, res) {
      res
        .set('X-Some-Header', 'Some value')
        .send();
    });

    request(app)
      .get('/')
      .expect('X-Some-Header', 'Some value')
      .expect(function (res) {
        res.headers['x-some-header'] = '';
      })
      .expect('X-Some-Header', '')
      .end(done);
  });

  it('should call expect(fn) and expect(body) in order', function (done) {
    const app = express();

    app.get('/', function (req, res) {
      res.json({ somebody: 'some body value' });
    });

    request(app)
      .get('/')
      .expect(/some body value/)
      .expect(function (res) {
        res.body.somebody = 'nobody';
      })
      .expect(/some body value/) // res.text should not be modified.
      .expect({ somebody: 'nobody' })
      .expect(function (res) {
        res.text = 'gone';
      })
      .expect('gone')
      .expect(/gone/)
      .expect({ somebody: 'nobody' }) // res.body should not be modified
      .expect('gone', done);
  });
});

describe('request.get(url).query(vals) works as expected', function () {
  it('normal single query string value works', function (done) {
    const app = express();
    app.get('/', function (req, res) {
      res.status(200).send(req.query.val);
    });

    request(app)
      .get('/')
      .query({ val: 'Test1' })
      .expect(200, function (err, res) {
        res.text.should.be.equal('Test1');
        done();
      });
  });

  it('array query string value works', function (done) {
    const app = express();
    app.get('/', function (req, res) {
      res.status(200).send(Array.isArray(req.query.val));
    });

    request(app)
      .get('/')
      .query({ 'val[]': ['Test1', 'Test2'] })
      .expect(200, function (err, res) {
        res.req.path.should.be.equal('/?val%5B%5D=Test1&val%5B%5D=Test2');
        res.text.should.be.equal('true');
        done();
      });
  });

  it('array query string value work even with single value', function (done) {
    const app = express();
    app.get('/', function (req, res) {
      res.status(200).send(Array.isArray(req.query.val));
    });

    request(app)
      .get('/')
      .query({ 'val[]': ['Test1'] })
      .expect(200, function (err, res) {
        res.req.path.should.be.equal('/?val%5B%5D=Test1');
        res.text.should.be.equal('true');
        done();
      });
  });

  it('object query string value works', function (done) {
    const app = express();
    app.get('/', function (req, res) {
      res.status(200).send(req.query.val.test);
    });

    request(app)
      .get('/')
      .query({ val: { test: 'Test1' } })
      .expect(200, function (err, res) {
        res.text.should.be.equal('Test1');
        done();
      });
  });

  it('handles unknown errors (err without res)', function (done) {
    const app = express();

    nock.disableNetConnect();

    app.get('/', function (req, res) {
      res.status(200).send('OK');
    });

    request(app)
      .get('/')
      // This expect should never get called, but exposes this issue with other
      // errors being obscured by the response assertions
      // https://github.com/visionmedia/supertest/issues/352
      .expect(200)
      .end(function (err, res) {
        should.exist(err);
        should.not.exist(res);
        err.should.be.an.instanceof(Error);
        err.message.should.match(/Nock: Disallowed net connect/);
        shouldIncludeStackWithThisFile(err);
        done();
      });

    nock.restore();
  });

  // this scenario should never happen
  // there shouldn't be any res if there is an err
  // meant for test coverage for lib/test.js#169
  // https://github.com/visionmedia/supertest/blob/5543d674cf9aa4547927ba6010d31d9474950dec/lib/test.js#L169
  it('handles unknown errors (err with res)', function (done) {
    const app = express();

    app.get('/', function (req, res) {
      res.status(200).send('OK');
    });

    const resError = new Error();
    resError.status = 400;

    const serverRes = { status: 200 };

    request(app)
      .get('/')
      // private api
      .assert(resError, serverRes, function (err, res) {
        should.exist(err);
        should.exist(res);
        err.should.equal(resError);
        res.should.equal(serverRes);
        // close the server explicitly (as we are not using expect/end/then)
        this.end(done);
      });
  });

  it('should assert using promises', function (done) {
    const app = express();

    app.get('/', function (req, res) {
      res.status(400).send({ promise: true });
    });

    request(app)
      .get('/')
      .expect(400)
      .then((res) => {
        res.body.promise.should.be.equal(true);
        done();
      });
  });
});

const describeHttp2 = (http2) ? describe : describe.skip;
describeHttp2('http2', function() {
  // eslint-disable-next-line global-require
  const proxyquire = require('proxyquire');

  const tests = [
    {
      title: 'request(app)',
      api: request,
      mockApi: proxyquire('../index.js', { http2: null })
    },
    {
      title: 'request.agent(app)',
      api: request.agent,
      mockApi: proxyquire('../lib/agent.js', { http2: null })
    }
  ];

  tests.forEach(({ title, api, mockApi }) => {
    describe(title, function () {
      const app = function(req, res) {
        res.end('hey');
      };

      it('should fire up the app on an ephemeral port', function (done) {
        api(app, { http2: true })
          .get('/')
          .end(function (err, res) {
            res.status.should.equal(200);
            res.text.should.equal('hey');
            done();
          });
      });

      it('should work with an active server', function (done) {
        const server = http2.createServer(app);

        server.listen(function () {
          api(server)
            .get('/')
            .http2()
            .end(function (err, res) {
              res.status.should.equal(200);
              res.text.should.equal('hey');
              // close the external server explictly
              server.close(done);
            });
        });
      });

      it('should throw error if http2 is not supported', function() {
        (function() {
          mockApi(app, { http2: true });
        }).should.throw('supertest: this version of Node.js does not support http2');
      });
    });
  });
});