wopian/kitsu

import { filterIncludes } from './'

describe('kitsu-core', () => {
  describe('filterIncludes', () => {
    it('throws an error if included is not an array', () => {
      expect.assertions(1)
      expect(() => filterIncludes({}, { id: '1', type: 'anime' }))
        .toThrowError('included.filter is not a function')
    })

    it('returns id and type if included is empty', () => {
      expect.assertions(1)
      const response = filterIncludes([], { id: '1', type: 'comments' })
      expect(response).toEqual({ id: '1', type: 'comments' })
    })

    it('returns an empty object if id is undefined', () => {
      expect.assertions(1)
      const response = filterIncludes([], { })
      expect(response).toEqual({ })
    })

    it('filters included relationships', () => {
      expect.assertions(1)
      const includes = [
        {
          id: '1',
          type: 'users',
          attributes: {
            name: 'Emma'
          }
        },
        {
          id: '2',
          type: 'users',
          attributes: {
            name: 'Josh'
          }
        }
      ]
      const relationship = {
        id: '1',
        type: 'users'
      }
      const response = filterIncludes(includes, relationship)
      expect(response).toEqual({
        id: '1',
        type: 'users',
        attributes: {
          name: 'Emma'
        }
      })
    })
  })
})