import { expect } from 'chai'

import { createTestApp, cleanTestDir, createFile } from './helpers.js'

describe('Content Negotiation', () => {

let request, testDir

beforeEach(() => {

({ request, testDir } = createTestApp())

})

afterEach(() => cleanTestDir(testDir))

it('returns Turtle by default for .ttl', async () => {

createFile(testDir, 'data.ttl', '<http://example.org/s> <http://example.org/p> "o".')

const res = await request.get('/data.ttl').expect(200)

expect(res.headers['content-type']).to.match(/text\/turtle/)

})

it('converts Turtle to JSON-LD when requested', async () => {

createFile(testDir, 'data.ttl', '<http://example.org/s> <http://example.org/p> "o".')

const res = await request.get('/data.ttl')

.set('Accept', 'application/ld+json')

.expect(200)

expect(res.headers['content-type']).to.match(/application\/ld\+json/)

const json = JSON.parse(res.text)

expect(json).to.be.an('object')

})

it('converts Turtle to N-Triples', async () => {

createFile(testDir, 'data.ttl', '<http://example.org/s> <http://example.org/p> "o".')

const res = await request.get('/data.ttl')

.set('Accept', 'application/n-triples')

.expect(200)

expect(res.headers['content-type']).to.match(/application\/n-triples/)

})

it('returns 406 for incompatible Accept on non-RDF', async () => {

createFile(testDir, 'image.png', 'fake png data')

await request.get('/image.png')

.set('Accept', 'text/turtle')

.expect(406)

})

it('serves non-RDF files with their native type', async () => {

createFile(testDir, 'style.css', 'body { color: red }')

const res = await request.get('/style.css').expect(200)

expect(res.headers['content-type']).to.match(/text\/css/)

})

it('serves container as Turtle', async () => {

const fs = await import('fs-extra')

fs.mkdirpSync(testDir + '/box')

const res = await request.get('/box/').expect(200)

expect(res.headers['content-type']).to.match(/text\/turtle/)

})

})