express/test/res.clearCookie.js

'use strict'

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

describe('res', function(){
  describe('.clearCookie(name)', function(){
    it('should set a cookie passed expiry', function(done){
      var app = express();

      app.use(function(req, res){
        res.clearCookie('sid').end();
      });

      request(app)
      .get('/')
      .expect('Set-Cookie', 'sid=; Path=/; Expires=Thu, 01 Jan 1970 00:00:00 GMT')
      .expect(200, done)
    })
  })

  describe('.clearCookie(name, options)', function(){
    it('should set the given params', function(done){
      var app = express();

      app.use(function(req, res){
        res.clearCookie('sid', { path: '/admin' }).end();
      });

      request(app)
      .get('/')
      .expect('Set-Cookie', 'sid=; Path=/admin; Expires=Thu, 01 Jan 1970 00:00:00 GMT')
      .expect(200, done)
    })

    it('should set expires when passed', function(done) {
      var expiresAt = new Date()
      var app = express();

      app.use(function(req, res){
        res.clearCookie('sid', { expires: expiresAt }).end();
      });

      request(app)
      .get('/')
      .expect('Set-Cookie', 'sid=; Path=/; Expires=' + expiresAt.toUTCString() )
      .expect(200, done)
    })

    it('should set both maxAge and expires when passed', function(done) {
      var maxAgeInMs = 10000
      var expiresAt = new Date()
      var expectedExpires = new Date(expiresAt.getTime() + maxAgeInMs)
      var app = express();

      app.use(function(req, res){
        res.clearCookie('sid', { expires: expiresAt, maxAge: maxAgeInMs }).end();
      });

      request(app)
      .get('/')
      // yes, this is the behavior. When we set a max-age, we also set expires to a date 10 sec ahead of expires
      // even if we set max-age only, we will also set an expires 10 sec in the future
      .expect('Set-Cookie', 'sid=; Max-Age=10; Path=/; Expires=' + expectedExpires.toUTCString())
      .expect(200, done)
    })
  })
})