res.send.js

var express = require('../')
  , request = require('supertest')
  , assert = require('assert');

describe('res', function(){
  describe('.send(null)', function(){
    it('should set body to ""', function(done){
      var app = express();

      app.use(function(req, res){
        res.send(null);
      });

      request(app)
      .get('/')
      .expect('Content-Length', '0')
      .expect('', done);
    })
  })

  describe('.send(undefined)', function(){
    it('should set body to ""', function(done){
      var app = express();

      app.use(function(req, res){
        res.send(undefined);
      });

      request(app)
      .get('/')
      .expect('', function(req, res){
        res.header.should.not.have.property('content-length');
        done();
      });
    })
  })

  describe('.send(code)', function(){
    it('should set .statusCode', function(done){
      var app = express();

      app.use(function(req, res){
        res.send(201).should.equal(res);
      });

      request(app)
      .get('/')
      .expect('Created')
      .expect(201, done);
    })
  })

  describe('.send(code, body)', function(){
    it('should set .statusCode and body', function(done){
      var app = express();

      app.use(function(req, res){
        res.send(201, 'Created :)');
      });

      request(app)
      .get('/')
      .expect('Created :)')
      .expect(201, done);
    })
  })

  describe('.send(body, code)', function(){
    it('should be supported for backwards compat', function(done){
      var app = express();

      app.use(function(req, res){
        res.send('Bad!', 400);
      });

      request(app)
      .get('/')
      .expect('Bad!')
      .expect(400, done);
    })
  })

  describe('.send(String)', function(){
    it('should send as html', function(done){
      var app = express();

      app.use(function(req, res){
        res.send('<p>hey</p>');
      });

      request(app)
      .get('/')
      .end(function(err, res){
        res.headers.should.have.property('content-type', 'text/html; charset=utf-8');
        res.text.should.equal('<p>hey</p>');
        res.statusCode.should.equal(200);
        done();
      })
    })

    it('should set ETag', function(done){
      var app = express();

      app.use(function(req, res){
        var str = Array(1024 * 2).join('-');
        res.send(str);
      });

      request(app)
      .get('/')
      .expect('ETag', 'W/"7ff-2796319984"')
      .end(done);
    })

    it('should not set ETag for non-GET/HEAD', function(done){
      var app = express();

      app.use(function(req, res){
        var str = Array(1024 * 2).join('-');
        res.send(str);
      });

      request(app)
      .post('/')
      .end(function(err, res){
        if (err) return done(err);
        assert(!res.header.etag, 'has an ETag');
        done();
      });
    })

    it('should not override Content-Type', function(done){
      var app = express();

      app.use(function(req, res){
        res.set('Content-Type', 'text/plain').send('hey');
      });

      request(app)
      .get('/')
      .expect('Content-Type', 'text/plain; charset=utf-8')
      .expect(200, 'hey', done);
    })

    it('should override charset in Content-Type', function(done){
      var app = express();

      app.use(function(req, res){
        res.set('Content-Type', 'text/plain; charset=iso-8859-1').send('hey');
      });

      request(app)
      .get('/')
      .expect('Content-Type', 'text/plain; charset=utf-8')
      .expect(200, 'hey', done);
    })

    it('should keep charset in Content-Type for Buffers', function(done){
      var app = express();

      app.use(function(req, res){
        res.set('Content-Type', 'text/plain; charset=iso-8859-1').send(new Buffer('hi'));
      });

      request(app)
      .get('/')
      .expect('Content-Type', 'text/plain; charset=iso-8859-1')
      .expect(200, 'hi', done);
    })
  })

  describe('.send(Buffer)', function(){
    it('should send as octet-stream', function(done){
      var app = express();

      app.use(function(req, res){
        res.send(new Buffer('hello'));
      });

      request(app)
      .get('/')
      .end(function(err, res){
        res.headers.should.have.property('content-type', 'application/octet-stream');
        res.text.should.equal('hello');
        res.statusCode.should.equal(200);
        done();
      })
    })

    it('should set ETag', function(done){
      var app = express();

      app.use(function(req, res){
        var str = Array(1024 * 2).join('-');
        res.send(new Buffer(str));
      });

      request(app)
      .get('/')
      .expect('ETag', 'W/"7ff-2796319984"')
      .end(done);
    })

    it('should not override Content-Type', function(done){
      var app = express();

      app.use(function(req, res){
        res.set('Content-Type', 'text/plain').send(new Buffer('hey'));
      });

      request(app)
      .get('/')
      .end(function(err, res){
        res.headers.should.have.property('content-type', 'text/plain; charset=utf-8');
        res.text.should.equal('hey');
        res.statusCode.should.equal(200);
        done();
      })
    })
  })

  describe('.send(Object)', function(){
    it('should send as application/json', function(done){
      var app = express();

      app.use(function(req, res){
        res.send({ name: 'tobi' });
      });

      request(app)
      .get('/')
      .expect('Content-Type', 'application/json; charset=utf-8')
      .expect(200, '{"name":"tobi"}', done)
    })
  })

  describe('when the request method is HEAD', function(){
    it('should ignore the body', function(done){
      var app = express();

      app.use(function(req, res){
        res.send('yay');
      });

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

  describe('when .statusCode is 204', function(){
    it('should strip Content-* fields, Transfer-Encoding field, and body', function(done){
      var app = express();

      app.use(function(req, res){
        res.status(204).set('Transfer-Encoding', 'chunked').send('foo');
      });

      request(app)
      .get('/')
      .end(function(err, res){
        res.headers.should.not.have.property('content-type');
        res.headers.should.not.have.property('content-length');
        res.headers.should.not.have.property('transfer-encoding');
        res.text.should.equal('');
        done();
      })
    })
  })

  describe('when .statusCode is 304', function(){
    it('should strip Content-* fields, Transfer-Encoding field, and body', function(done){
      var app = express();

      app.use(function(req, res){
        res.status(304).set('Transfer-Encoding', 'chunked').send('foo');
      });

      request(app)
      .get('/')
      .end(function(err, res){
        res.headers.should.not.have.property('content-type');
        res.headers.should.not.have.property('content-length');
        res.headers.should.not.have.property('transfer-encoding');
        res.text.should.equal('');
        done();
      })
    })
  })

  it('should always check regardless of length', function(done){
    var app = express();
    var etag = '"asdf"';

    app.use(function(req, res, next){
      res.set('ETag', etag);
      res.send('hey');
    });

    request(app)
    .get('/')
    .set('If-None-Match', etag)
    .expect(304, done);
  })

  it('should respond with 304 Not Modified when fresh', function(done){
    var app = express();

    app.use(function(req, res){
      var str = Array(1024 * 2).join('-');
      res.send(str);
    });

    request(app)
    .get('/')
    .set('If-None-Match', 'W/"7ff-2796319984"')
    .expect(304, done);
  })

  it('should not perform freshness check unless 2xx or 304', function(done){
    var app = express();
    var etag = '"asdf"';

    app.use(function(req, res, next){
      res.status(500);
      res.set('ETag', etag);
      res.send('hey');
    });

    request(app)
    .get('/')
    .set('If-None-Match', etag)
    .expect('hey')
    .expect(500, done);
  })

  it('should not support jsonp callbacks', function(done){
    var app = express();

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

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

  describe('"etag" setting', function(){
    describe('when enabled', function(){
      it('should send ETag', function(done){
        var app = express();

        app.use(function(req, res){
          res.send('kajdslfkasdf');
        });

        app.enable('etag');

        request(app)
        .get('/')
        .expect('etag', 'W/"c-1525560792"', done)
      })

      it('should send ETag for empty string response', function(done){
        var app = express()

        app.use(function(req, res){
          res.send('')
        });

        app.enable('etag')

        request(app)
        .get('/')
        .expect('etag', 'W/"0-0"', done)
      })

      it('should send ETag for long response', function(done){
        var app = express();

        app.use(function(req, res){
          var str = Array(1024 * 2).join('-');
          res.send(str);
        });

        app.enable('etag');

        request(app)
        .get('/')
        .expect('etag', 'W/"7ff-2796319984"', done)
      });

      it('should not override ETag when manually set', function(done){
        var app = express();

        app.use(function(req, res){
          res.set('etag', '"asdf"');
          res.send(200);
        });

        app.enable('etag');

        request(app)
        .get('/')
        .expect('etag', '"asdf"', done)
      });

      it('should not send ETag for res.send()', function(done){
        var app = express()

        app.use(function(req, res){
          res.send()
        });

        app.enable('etag')

        request(app)
        .get('/')
        .end(function(err, res){
          res.headers.should.not.have.property('etag');
          done();
        })
      })
    });

    describe('when disabled', function(){
      it('should send no ETag', function(done){
        var app = express();

        app.use(function(req, res){
          var str = Array(1024 * 2).join('-');
          res.send(str);
        });

        app.disable('etag');

        request(app)
        .get('/')
        .end(function(err, res){
          res.headers.should.not.have.property('etag');
          done();
        });
      });

      it('should send ETag when manually set', function(done){
        var app = express();

        app.disable('etag');

        app.use(function(req, res){
          res.set('etag', '"asdf"');
          res.send(200);
        });

        request(app)
        .get('/')
        .expect('etag', '"asdf"', done)
      });
    });

    describe('when "strong"', function(){
      it('should send strong ETag', function(done){
        var app = express()

        app.set('etag', 'strong');

        app.use(function(req, res){
          res.send('hello, world!');
        });

        request(app)
        .get('/')
        .expect('etag', '"Otu60XkfuuPskIiUxJY4cA=="', done)
      })
    })

    describe('when "weak"', function(){
      it('should send weak ETag', function(done){
        var app = express()

        app.set('etag', 'weak');

        app.use(function(req, res){
          res.send('hello, world!');
        });

        request(app)
        .get('/')
        .expect('etag', 'W/"d-1486392595"', done)
      })
    })

    describe('when a function', function(){
      it('should send custom ETag', function(done){
        var app = express()

        app.set('etag', function(body, encoding){
          body.should.equal('hello, world!')
          encoding.should.equal('utf8')
          return '"custom"'
        });

        app.use(function(req, res){
          res.send('hello, world!');
        });

        request(app)
        .get('/')
        .expect('etag', '"custom"', done)
      })

      it('should not send falsy ETag', function(done){
        var app = express()

        app.set('etag', function(body, encoding){
          return undefined
        });

        app.use(function(req, res){
          res.send('hello, world!');
        });

        request(app)
        .get('/')
        .end(function(err, res){
          res.headers.should.not.have.property('etag')
          done();
        })
      })
    })
  })
})