const languages = require('../../lib/languages')

const robotsParser = require('robots-parser')

const robotsMiddleware = require('../../middleware/robots')

const { get } = require('../helpers/supertest')

const MockExpressResponse = require('mock-express-response')

describe('robots.txt', () => {

jest.setTimeout(5 * 60 * 1000)

let res, robots

beforeAll(async (done) => {

res = await get('/robots.txt')

robots = robotsParser('https://docs.github.com/robots.txt', res.text)

done()

})

it('allows indexing of the homepage and English content', async () => {

expect(robots.isAllowed('https://docs.github.com/')).toBe(true)

expect(robots.isAllowed('https://docs.github.com/en')).toBe(true)

expect(robots.isAllowed('https://docs.github.com/en/articles/verifying-your-email-address')).toBe(true)

})

it('allows indexing of generally available localized content', async () => {

Object.values(languages)

.filter(language => !language.wip)

.forEach(language => {

expect(robots.isAllowed(`https://docs.github.com/${language.code}`)).toBe(true)

expect(robots.isAllowed(`https://docs.github.com/${language.code}/articles/verifying-your-email-address`)).toBe(true)

})

})

it('disallows indexing of herokuapp.com domains', async () => {

const req = {

hostname: 'docs-internal-12345--my-branch.herokuapp.com',

path: '/robots.txt'

}

const res = new MockExpressResponse()

const next = () => { /* no op */ }

await robotsMiddleware(req, res, next)

expect(res._getString()).toEqual('User-agent: *\nDisallow: /')

})

it('does not have duplicate lines', () => {

const lines = new Set()

for (const line of res.text.split('\n')) {

if (/^\s*$/.test(line)) continue

expect(lines.has(line)).toBe(false)

lines.add(line)

}

})

})