import { expect } from 'chai'
import { arrayOrObj, findInstance, normalizeDelta } from '../lib/deltaUtils'

describe('deltaUtils', () => {
  describe('arrayOrObj', () => {
    it('should return same array if passed an array', () => {
      const arr = ['foo']
      expect(arrayOrObj(arr)).to.equal(arr)
    })
    it('should return an array containing obj', () => {
      const obj = {}
      expect(arrayOrObj(obj)[0]).to.equal(obj)
    })
  })
  describe('findInstance', () => {
    it('should return true if objects match', () => {
      const obj1 = { hostName: 'foo', port: { $: '6969' } }
      const obj2 = { hostName: 'foo', port: { $: '6969' } }
      expect(findInstance(obj1)(obj2)).to.equal(true)
    })
    it('should return false if objects do not match', () => {
      const obj1 = { hostName: 'foo', port: { $: '6969' } }
      const obj2 = { hostName: 'bar', port: { $: '1111' } }
      expect(findInstance(obj1)(obj2)).to.equal(false)
    })
  })
  describe('normalizeDelta', () => {
    it('should normalize nested objs to arrays', () => {
      const delta = {
        instance: {
          hostName: 'foo',
          port: { $: '6969' },
        },
      }
      const normalized = normalizeDelta(delta)
      expect(normalized).to.be.an('array')
      expect(normalized[0].instance).to.be.an('array')
    })
  })
})