const cds = require('@sap/cds/lib/cds')

describe('Bookshop: OData Protocol Level Testing', () => {
  const app = require('express')()
  const request = require('supertest')(app)
  
  it ('should serve BooksShop', async ()=>{
    await cds.deploy (__dirname+'/cat-service') .to ('sqlite::memory:')
    await cds.serve('CatalogService').from(__dirname+'/cat-service') .in (app)
    //await cds.serve('CatalogService').from(__dirname+'/../srv') .in (app)
  })

  it('Service $metadata document', async () => {
    //const response = await request(cds.serve.app)
    const response = await request
      .get('/browse/$metadata')
      .expect('Content-Type', /^application\/xml/)
      .expect(200)

    const expectedVersion = '<edmx:Edmx Version="4.0" xmlns:edmx="http://docs.oasis-open.org/odata/ns/edmx">'
    const expectedBooksEntitySet = '<EntitySet Name="Books" EntityType="CatalogService.Books">'
    expect(response.text.includes(expectedVersion)).toBeTruthy()
    expect(response.text.includes(expectedBooksEntitySet)).toBeTruthy()
  })


  it('Get with select, expand and localized', async () => {
    //const response = await request(cds.serve.app)
    const response = await request
      .get('/browse/Books?$select=title,author&$expand=currency&sap-language=de')
      .expect('Content-Type', /^application\/json/)
      .expect(200)

    expect(response.body.value).toEqual([
      {
        ID: 201,
        title: "Sturmhöhe",
        author: "Emily Brontë",
        currency: {
        name: "Pfund",
        descr: "Britische Pfund",
        code: "GBP",
        symbol: "£"
        }
        },
        {
        ID: 207,
        title: "Jane Eyre",
        author: "Charlotte Brontë",
        currency: {
        name: "Pfund",
        descr: "Britische Pfund",
        code: "GBP",
        symbol: "£"
        }
        },
        {
        ID: 251,
        title: "The Raven",
        author: "Edgar Allen Poe",
        currency: {
        name: "US-Dollar",
        descr: "United States Dollar",
        code: "USD",
        symbol: "$"
        }
        },
        {
        ID: 252,
        title: "Eleonora",
        author: "Edgar Allen Poe",
        currency: {
        name: "US-Dollar",
        descr: "United States Dollar",
        code: "USD",
        symbol: "$"
        }
        },
        {
        ID: 271,
        title: "Catweazle",
        author: "Richard Carpenter",
        currency: {
        name: "Euro",
        descr: "European Euro",
        code: "EUR",
        symbol: "€"
        }
        }
    ])
  }) 
})

describe('Bookshop: CDS Service Level Testing', () => {
  let srv, Books

    test('Should serve bookshop', async () => {
      srv = await cds.serve('CatalogService')
      .from(__dirname+'/cat-service')
    Books = srv.entities.Books
      expect(Books).toBeDefined()
    })

    test('GET all books', async () => {
      const books = await srv.read (
        //Books, b=>{ b.ID, b.title }
        Books, b=>{ b.title }
    )

        expect (books) .toMatchObject([
            { title: 'Wuthering Heights' },
            { title: 'Jane Eyre' },
            { title: 'The Raven' },
            { title: 'Eleonora' },
            { title: 'Catweazle' }
        ]) 
    })
})