const { GET, expect } = require('./cds').test('bookshop').in(__dirname,'..')

describe('OData Protocol', () => {

  it('serves $metadata documents in v4', async () => {
    const { headers, status, data } = await GET`/browse/$metadata`
    expect(status).to.equal(200)
    expect(headers).to.contain({
      'content-type': 'application/xml',
      'odata-version': '4.0',
    })
    expect(data).to.contain('<EntitySet Name="Books" EntityType="CatalogService.Books">')
    expect(data).to.contain('<Annotation Term="Common.Label" String="Currency"/>')
  })

  it('supports $search in multiple fields', async () => {
    const { data } = await GET(`/browse/Books`, {
      params: { $search: 'Po', $select: `title,author` },
    })
    expect(data.value).to.eql([
      { ID: 201, title: 'Wuthering Heights', author: 'Emily Brontë' },
      { ID: 207, title: 'Jane Eyre', author: 'Charlotte Brontë' },
      { ID: 251, title: 'The Raven', author: 'Edgar Allen Poe' },
      { ID: 252, title: 'Eleonora', author: 'Edgar Allen Poe' },
    ])
  })

  it('supports $select', async () => {
    const { data } = await GET(`/browse/Books`, {
      params: { $select: `ID,title` },
    })
    expect(data.value).to.eql([
      { ID: 201, title: 'Wuthering Heights' },
      { ID: 207, title: 'Jane Eyre' },
      { ID: 251, title: 'The Raven' },
      { ID: 252, title: 'Eleonora' },
      { ID: 271, title: 'Catweazle' },
    ])
  })

  it('supports $expand', async () => {
    const { data } = await GET(`/admin/Authors`, {
      params: {
        $select: `name`,
        $expand: `books($select=title)`,
      },
    })
    expect(data.value).to.containSubset([
      { name: 'Emily Brontë', books: [{ title: 'Wuthering Heights' }] },
      { name: 'Charlotte Brontë', books: [{ title: 'Jane Eyre' }] },
      { name: 'Edgar Allen Poe', books: [{ title: 'The Raven' }, { title: 'Eleonora' }] },
      { name: 'Richard Carpenter', books: [{ title: 'Catweazle' }] },
    ])
  })

  it('supports $value requests', async () => {
    const { data } = await GET`/admin/Books/201/stock/$value`
    expect(data).to.equal(12)
  })

  it('supports $top/$skip paging', async () => {
    const { data: p1 } = await GET`/browse/Books?$select=title&$top=3`
    expect(p1.value).to.eql([
      { ID: 201, title: 'Wuthering Heights' },
      { ID: 207, title: 'Jane Eyre' },
      { ID: 251, title: 'The Raven' },
    ])
    const { data: p2 } = await GET`/browse/Books?$select=title&$skip=3`
    expect(p2.value).to.eql([
      { ID: 252, title: 'Eleonora' },
      { ID: 271, title: 'Catweazle' },
    ])
  })
})