overleaf/services/web/test/acceptance/src/UnsupportedBrowserTests.js

const { expect } = require('chai')
const User = require('./helpers/User')

describe('UnsupportedBrowsers', function () {
  beforeEach(function (done) {
    this.user = new User()
    this.user.login(done)
  })

  it('allows bots', function (done) {
    this.user.request(
      {
        url: '/project',
        headers: {
          // Googlebot user agent
          'user-agent':
            'Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)',
        },
      },
      (error, response) => {
        expect(error).to.not.exist
        expect(response.statusCode).to.equal(200)
        done()
      }
    )
  })

  it('allows supported browsers', function (done) {
    this.user.request(
      {
        url: '/project',
        headers: {
          // Chrome 90 user agent
          'user-agent':
            'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.4430.72 Safari/537.36',
        },
      },
      (error, response) => {
        expect(error).to.not.exist
        expect(response.statusCode).to.equal(200)
        done()
      }
    )
  })

  it('redirects unsupported browsers to unsupported page', function (done) {
    const url = '/project'
    this.user.request(
      {
        url,
        headers: {
          // IE11 user agent
          'user-agent':
            'Mozilla/5.0 (Windows NT 10.0; Trident/7.0; rv:11.0) like Gecko',
        },
      },
      (error, response) => {
        expect(error).to.not.exist
        expect(response.statusCode).to.equal(302)
        expect(response.headers.location).to.equal(
          '/unsupported-browser?fromURL=' + encodeURIComponent(url)
        )
        done()
      }
    )
  })

  it('shows the previous URL', function (done) {
    const url = '/project/60867f47174dfd13f1e00000'
    this.user.request(
      {
        url: '/unsupported-browser?fromURL=' + encodeURIComponent(url),
        headers: {
          // IE11 user agent
          'user-agent':
            'Mozilla/5.0 (Windows NT 10.0; Trident/7.0; rv:11.0) like Gecko',
        },
      },
      (error, response, body) => {
        expect(error).to.not.exist
        expect(response.statusCode).to.equal(200)
        expect(body).to.include('URL:')
        expect(body).to.include(url)
        done()
      }
    )
  })

  it('shows a sanitized URL', function (done) {
    const url = 'https://evil.com/the/pathname'
    this.user.request(
      {
        url: '/unsupported-browser?fromURL=' + encodeURIComponent(url),
        headers: {
          // IE11 user agent
          'user-agent':
            'Mozilla/5.0 (Windows NT 10.0; Trident/7.0; rv:11.0) like Gecko',
        },
      },
      (error, response, body) => {
        expect(error).to.not.exist
        expect(response.statusCode).to.equal(200)
        expect(body).to.include('URL:')
        expect(body).to.not.include('evil.com')
        expect(body).to.include('/the/pathname')
        done()
      }
    )
  })
})